We are offering shares of our common stock, par value $0.001 per share. The initial public offering price of our common stock will be $17.00 per share.

This is our initial public offering, and prior to this offering there has been no public market for our common stock. We have been approved to list our shares of common stock for trading on the Nasdaq Global Market under the symbol “TLS”.

We are an “emerging growth company,” as defined in Section 2(a) of the Securities Act of 1933, as amended, and will be subject to reduced public reporting requirements. This prospectus complies with the requirements that apply to an issuer that is an emerging growth company.

Investing in our common stock involves risk. See “Risk Factors” beginning on page 16.

We have granted to the underwriters an option to purchase up to 2,245,328 additional shares of common stock to cover overallotments, if any, exercisable at any time until 30 days after the date of this prospectus.

The underwriters have reserved 617,647 shares from this offering for sale, directly or indirectly, to our directors, officers, employees, and certain friends and family members of these persons, and certain clients and prospective clients, at the public offering price without payment of an underwriting discount or commission.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or determined if this prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

The underwriters expect to deliver the shares of common stock against payment on November 23, 2020.

Colliers Securities LLC

D.A. Davidson & Co.

Northland Capital Markets

Wedbush Securities

MKM Partners

The date of this prospectus is November 18, 2020.

You should rely only on the information contained in this prospectus or any information incorporated by reference herein or in any free writing prospectuses or amendments thereto that we may provide to you in connection with this offering. Neither we nor any of the underwriters have authorized anyone to provide you with information different from, or in addition to, that contained in this prospectus or incorporated by reference herein or in any such free writing prospectus. If anyone provides you with different or inconsistent information, you should not rely on it. We can provide no assurance as to the reliability of any other information that others may give to you. The information in this prospectus or incorporated by reference in this prospectus is accurate only as of the date on the front cover of this prospectus, and the information in any free writing prospectus that we may provide you in connection with this offering is accurate only as of the date of such free writing prospectus. Our business, financial condition, results of operations and prospects may have changed since those dates. Neither we nor any of the underwriters are making an offer to sell or seeking offers to buy these securities in any jurisdiction where or to any person to whom the offer or sale is not permitted.

Investing in our common stock involves a high degree of risk. Before making an investment decision with respect to our common stock, you should carefully consider the following risks and all of the other information contained or incorporated by reference in the prospectus. If any of the following risks were to occur, our business, financial condition, results of operations, cash flows or prospects could be materially and adversely affected. In that event, the trading price of our common stock could decline, and you could lose all or part of your investment in our common stock. Some statements in this prospectus, including such statements in the following risk factors, constitute forward-looking statements. See “Cautionary Note Regarding Forward-Looking Statements.”

The following risk factors in this section entitled “Risks Related to Our Business and Industry” are in addition to those risk factors disclosed in our Annual Report on Form 10-K, filed with the SEC on April 13, 2020, which are incorporated by reference herein.

We derive a substantial portion of our revenues from U.S. government contracting, and as a result, we are subject to the annual seasonality of the U.S. government purchasing. Because the U.S. government fiscal year ends on September 30, it is not uncommon for U.S. government agencies to award extra tasks in the weeks immediately prior to the end of its fiscal year in order to avoid the loss of unexpended fiscal year funds. As a result of this seasonality, we have historically experienced higher revenues in the third and fourth fiscal quarters, ending September 30 and December 31, respectively, with the pace of orders typically substantially reduced during the first and second fiscal quarters ending March 31 and June 30, respectively.

We expect that we may change our pricing model from time to time, including as a result of competition, global economic conditions, and general reductions in our customers’ spending levels, pricing studies, or changes in how our solutions are broadly consumed. Similarly, as we introduce new products and services, or as a result of the evolution of our existing solutions and services, we may have difficulty determining the appropriate price structure for our products and services. In addition, as new and existing competitors introduce new products or services that compete with ours, or revise their pricing structures, we may be unable to attract new customers at the same price or based on the same pricing model as we have used historically. Moreover, as we continue to target selling our solutions and services to larger organizations, these larger organizations may demand substantial price concessions. In addition, we may need to change pricing policies to accommodate government pricing guidelines for our contracts with federal, state, local, and foreign governments and government agencies. If we are unable to modify or develop pricing models and strategies that are attractive to existing and prospective customers, while enabling us to significantly grow our sales and revenue relative to our associated costs and expenses in a reasonable period of time, our business, financial condition, and results of operations may be adversely impacted.

We rely on the technology, infrastructure, and software applications, of certain third parties, such as AWS and Microsoft Azure, in order to host or operate some of certain key platform features or functions of our business. Additionally, we rely on computer hardware and cloud capabilities purchased in order to deliver our solutions and services. We do not have control over the operations of the facilities of the third parties that we use. If any of these third-party services experience errors, disruptions, security issues, or other performance deficiencies, if they are updated such that our solutions become incompatible, if these services, software, or hardware fail or become unavailable due to extended outages, interruptions, defects, or otherwise, or if they are no longer available on commercially reasonable terms or prices (or at all), these issues could result in errors or defects in our solutions, cause our solutions to fail, our revenue and margins could decline, or our reputation and brand to be damaged, we could be exposed to legal or contractual liability, our expenses could increase, our ability to

manage our operations could be interrupted, and our processes for managing our sales and servicing our customers could be impaired until equivalent services or technology, if available, are identified, procured, and implemented, all of which may take significant time and resources, increase our costs, and could adversely affect our business. Many of these third-party providers attempt to impose limitations on their liability for such errors, disruptions, defects, performance deficiencies, or failures, and if enforceable, we may have additional liability to our customers or third-party providers.

We have experienced, and may in the future experience, disruptions, failures, data loss, outages, and other performance problems with our infrastructure and cloud-based offerings due to a variety of factors, including infrastructure changes, introductions of new functionality, human or software errors, employee misconduct, capacity constraints, denial of service attacks, phishing attacks, computer viruses, malicious or destructive code, or other security-related incidents, and our disaster recovery planning may not be sufficient for all situations. If we experience disruptions, failures, data loss, outages, or other performance problems, our business, financial condition, and results of operations could be adversely affected.

Our systems and the third-party systems upon which we and our customers rely are also vulnerable to damage or interruption from catastrophic occurrences such as earthquakes, floods, fires, power loss, telecommunication failures, cybersecurity threats, terrorist attacks, natural disasters, public health crises such as the COVID-19 pandemic, geopolitical and similar events, or acts of misconduct. Despite any precautions we may take, the occurrence of a catastrophic disaster or other unanticipated problems at our or our third-party vendors’ hosting facilities, or within our systems or the systems of third parties upon which we rely, could result in interruptions, performance problems, or failure of our infrastructure, technology, or solutions, which may adversely impact our business. In addition, our ability to conduct normal business operations could be severely affected. In the event of significant physical damage to one of these facilities, it may take a significant period of time to achieve full resumption of our services, and our disaster recovery planning may not account for all eventualities. In addition, any negative publicity arising from these disruptions could harm our reputation and brand and adversely affect our business.

Furthermore, our solutions are in many cases important or essential to our customers’ operations, including in some cases, their cybersecurity or oversight and compliance programs, and subject to service level agreements (“SLAs”). Any interruption in our service, whether as a result of an internal or third-party issue, could damage our brand and reputation, cause our customers to terminate or not renew their contracts with us or decrease use of our solutions and services, require us to indemnify our customers against certain losses, result in our issuing credit or paying penalties or fines, subject us to other losses or liabilities, cause our solutions to be perceived as unreliable or unsecure, and prevent us from gaining new or additional business from current or future customers, any of which could harm our business, financial condition, and results of operations.

Moreover, to the extent that we do not effectively address capacity constraints, upgrade our systems as needed, and continually develop our technology and network architecture to accommodate actual and anticipated changes in technology, our business, financial condition, and results of operations could be adversely affected. The provisioning of additional cloud hosting capacity requires lead time. AWS, Microsoft Azure, and other third parties have no obligation to renew their agreements with us on commercially reasonable terms, or at all. If AWS, Microsoft Azure, or other third parties increase pricing terms, terminate or seek to terminate our contractual relationship, establish more favorable relationships with our competitors, or change or interpret their terms of service or policies in a manner that is unfavorable with respect to us, we may be required to transfer to other cloud providers or invest in a private cloud. If we are required to transfer to other cloud providers or invest in a private cloud, we could incur significant costs and experience possible service interruption in connection with doing so, or risk loss of customer contracts if they are unwilling to accept such a change.

A failure to maintain our relationships with our third-party providers (or obtain adequate replacements), and to receive services from such providers that do not contain any material errors or defects, could adversely affect our ability to deliver effective products and solutions to our customers and adversely affect our business and results of operations.

A small number of our large customer contracts, including the TSA PreCheck™ enrollment program and our program with CMS, are expected to comprise a significant portion of our future revenue. Our business will likely be harmed if any of our key customer contracts do not generate as much revenue as we forecast, and the termination or delay of a large contract or of multiple contracts could have a material adverse effect on our revenue and profitability. Adverse events affecting the programs subject to these contracts could also negatively affect our ability to process transactions under those contracts, which could adversely affect our revenue and results of operations. For example, the COVID-19 pandemic may adversely affect or disrupt the TSA PreCheck™ enrollment program, which could lead to delays in the implementation of that program and changes in demand for that program. In addition, if the COVID-19 pandemic and associated protective or preventative measures expand, we may experience a material adverse effect on our business operations, revenues, financial condition, and ability to execute on business or contract opportunities; however, the ultimate impact is highly uncertain and subject to change.

We plan to expand our operations in new commercial markets, including those where we may have limited operating experience, and may be subject to increased business, technology and economic risks that could affect our financial results. In recent periods, we have increased our focus on commercial customers. In the future, we may increasingly focus on such customers, including in the banking, financial services, healthcare, pharmaceutical, manufacturing, telecommunication, airlines and aerospace, insurance, retail, transportation, shipping and logistics, and energy industries, as well as other critical infrastructure industries. Entering new verticals and expanding in the verticals in which we are already operating will continue to require significant resources and there is no guarantee that such efforts will be successful or beneficial to us. Historically, sales to a new customer have often led to additional sales to the same customer or similarly situated customers. As we expand into and within new and emerging markets and heavily regulated industry verticals, we will likely face additional regulatory scrutiny, risks, and burdens from the governments and agencies which regulate those markets and industries. While this approach to expansion within new commercial markets and verticals has proven successful in the past, it is uncertain we will achieve the same penetration and organic growth in the future and our reputation, business, financial condition, and results of operations could be negatively impacted.

We may seek to enter into other credit facilities with third-party lenders to help fund our business. Such credit facilities will likely require us to pay a commitment fee on the undrawn amount and will likely contain a number of affirmative and restrictive covenants.

If we violate any such covenants, our lenders could accelerate the maturity of any debt outstanding and we may be prohibited from making any distributions to our stockholders. Such debt may be secured by our assets, including the stock we may own in subsidiaries and the rights we have under intercompany loan agreements that we may enter into in the future with our businesses. Our ability to meet our debt service obligations may be affected by events beyond our control and will depend primarily upon cash produced by our business. Any failure to comply with the terms of our indebtedness may have a material adverse effect on our financial condition.

In addition, we expect that such credit facilities will bear interest at floating rates which will generally change as interest rates change. We will bear the risk that the rates that we are charged by our lenders will increase faster than we can grow the cash flow from our businesses, which could reduce profitability, materially adversely affect our ability to service our debt and cause us to breach covenants contained in our third-party credit facilities.

We are subject to a variety of local, state, national, and international laws and directives and regulations in the United States and abroad that involve matters central to our business, including privacy and data protection, data security, data storage, retention, transfer and deletion, technology protection, and personal information. Foreign data protection, data security, privacy, and other laws and regulations can impose different obligations or be more restrictive than those in the United States. These U.S. federal and state and foreign laws and regulations, which, depending on the regime, may be enforced by private parties or government entities, are constantly evolving and can be subject to significant change, and they are likely to remain uncertain for the foreseeable future. In addition, the application, interpretation, and enforcement of these laws and regulations are often uncertain, and may be interpreted and applied inconsistently from country to country and inconsistently with our current policies and practices. A number of proposals are pending before U.S. federal, state, and foreign legislative and regulatory bodies that could significantly affect our business.

The overarching complexity of privacy and data protection laws and regulations around the world pose a compliance challenge that could manifest in costs, damages, or liability in other forms as a result of failure to implement proper programmatic controls, failure to adhere to those controls, or the malicious or inadvertent breach of applicable privacy and data protection requirements by us, our employees, our business partners, or our customers.

In addition to government regulation, self-regulatory standards and other industry standards may legally or contractually apply to us, be argued to apply to us, or we may elect to comply with such standards or to facilitate our customers’ compliance with such standards. Because privacy, data protection, and information security are critical competitive factors in our industry, we may make statements on our website, in marketing materials, or in other settings about our data security measures and our compliance with, or our ability to facilitate our customers’ compliance with, these standards. We also expect that there will continue to be new proposed laws and regulations concerning privacy, data protection, and information security, and we cannot yet determine the impact such future laws, regulations and standards, or amendments to or re-interpretations of existing laws and regulations, industry standards, or other obligations may have on our business. New laws, amendments to or re-interpretations of existing laws and regulations, industry standards, and contractual and other obligations may require us to incur additional costs and restrict our business operations. As these legal regimes relating to privacy, data protection, and information security continue to evolve, they may result in ever-increasing public scrutiny and escalating levels of enforcement and sanctions. Furthermore, because the interpretation and application of laws, standards, contractual obligations and other obligations relating to privacy, data protection, and information security are uncertain, these laws, standards, and contractual and other obligations may be interpreted and applied in a manner that is, or is alleged to be, inconsistent with our data management practices, our policies or procedures, or the features of our solutions. If so, in addition to the possibility of fines, lawsuits, and other claims, we could be required to fundamentally change our business activities and practices or modify our solutions, which could have an adverse effect on our business. We may be unable to make such changes and modifications in a commercially reasonable manner or at all, and our ability to fulfill existing obligations, make enhancements, or develop new solutions and features could be limited. Furthermore, the costs of compliance with, and other burdens imposed by, the laws, regulations, and policies that are applicable to the businesses of our customers may limit the use and adoption of, and reduce the overall demand for, our solutions.

These existing and proposed laws and regulations can be costly to comply with and can make our solutions and services less effective or valuable, delay or impede the development of new products, result in negative publicity, increase our operating costs, require us to modify our data handling practices, limit our operations, impose substantial fines and penalties, require significant management time and attention, or put our data or technology at risk. Any failure or perceived failure by us or our solutions to comply with U.S., or applicable foreign laws, regulations, directives, policies, industry standards, or legal obligations relating to privacy, data protection, or information security, or any security incident that results in loss of or the unauthorized access to, or acquisition, use, release, or transfer of, personal information, personal data, or other customer or sensitive data sensitive data or information may result in governmental investigations, inquiries, enforcement actions and prosecutions, private

claims and litigation, indemnification or other contractual obligations, other remedies, including fines or demands that we modify or cease existing business practices, or adverse publicity, and related costs and liabilities, which could significantly and adversely affect our business and results of operations.

We prepare consolidated financial statements in accordance with U.S. generally accepted accounting principles (“GAAP”). In particular, we make certain estimates and assumptions related to the adoption and interpretation of these principles including the recognition of our revenue and the accounting of our stock-based compensation expense with respect to our consolidated financial statements. If these assumptions turn out to be incorrect, our revenue or our stock-based compensation expense could materially differ from our expectations, which could have a material adverse effect on our financial results. A change in any of these principles or guidance, or in their interpretations or application to us, may have a significant effect on our reported results, as well as our processes and related controls, and may retroactively affect previously reported results or our forecasts, which may negatively impact our financial statements. For example, recent new standards issued by the Financial Accounting Standards Board could materially impact our consolidated financial statements. The adoption of these new standards may potentially require enhancements or changes in our processes or systems and may require significant time and cost on behalf of our financial management. This may in turn adversely affect our results of operations and growth prospects.

The preparation of our consolidated financial statements in conformity with GAAP requires management to make judgments, estimates, and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. We base our estimates on historical experience and on various other assumptions that we believe to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets, liabilities, and equity, and the amount of revenue and expenses that are not readily apparent from other sources. Our results of operations may be adversely affected if our assumptions change or if actual circumstances differ from those in our assumptions, which could cause our results of operations to fall below the expectations of securities analysts and investors, resulting in a decline in the trading price of our common stock. Significant judgments, estimates, and assumptions used in preparing our consolidated financial statements include, or may in the future include, those related to revenue recognition, stock-based compensation, common stock valuations, and income taxes.

In December 2019, an outbreak of COVID-19 was reported in Wuhan, China. On March 11, 2020, the World Health Organization declared COVID-19 a global pandemic and on March 13, 2020, President Donald J. Trump declared the virus a national emergency. This highly contagious disease has spread to most of the countries in the world and throughout the United States, creating a serious impact on customers, workforces, and suppliers, disrupting economies and financial markets, and potentially leading to a world-wide economic downturn. It has caused a disruption of the normal operations of many businesses, including the temporary closure or scale-back of business operations and/or the imposition of either quarantine or remote work or meeting requirements for employees, either by government order or on a voluntary basis. The pandemic may adversely affect our customers’ ability to perform their missions and is in many cases disrupting their operations. It may also impact the ability of our subcontractors, partners, and suppliers to operate and fulfill their contractual obligations, and result in an increase in their costs and cause delays in performance. These supply chain effects, and the direct effect of the virus and the disruption on our operations, may negatively impact both our ability to meet customer demand and our revenue and profit margins. Our employees, in some cases, are working remotely due either to safety concerns or to customer imposed limitations and using various technologies to perform their functions. We could see delays or changes in customer demand, particularly if government funding priorities change. Additionally, the disruption and volatility in the global and domestic capital markets may increase the cost of capital and limit our ability to access capital. Both the health and economic aspects of COVID-19 are highly fluid and the future course of each is uncertain. For these reasons and other reasons that may come to light if the

coronavirus pandemic and associated protective or preventative measures expand, we may experience a material adverse effect on our business operations, revenues and financial condition, and our ability to execute on business or contract opportunities, including the TSA PreCheck^TM enrollment program; however, its ultimate impact is highly uncertain and subject to change.

There has been no public market for our common stock prior to this offering. Although we have been approved to list our common stock on The Nasdaq Global Market, we cannot assure you that a trading market for our common stock will develop, or, if a trading market does develop, that it will be sustained or how liquid such trading market will become. The initial public offering price for our common stock was determined through negotiations between the underwriters and us and may not be indicative of prices that will prevail in the open market following this offering. You may have difficulty selling any shares of our common stock that you may purchase. The market price of shares of our common stock may decline below the initial public offering price, and you may not be able to resell your shares of our common stock at or above the initial public offering price. Accordingly, we cannot assure you of your ability to sell your common stock when desired, or at all, or the prices that you may obtain for such common stock.

Even if a trading market develops, the market price of our common stock may be highly volatile and could be subject to wide fluctuations. Volatility in the market price of our common stock, as well as general economic, market or political conditions, may prevent you from being able to sell your shares at or above the price you paid for your shares and may otherwise negatively affect the liquidity of our common stock. You may experience a decrease, which could be substantial, in the value of your stock, including decreases unrelated to our operating performance or prospects, and you could lose part or all of your investment. The price of our common stock could be subject to wide fluctuations in response to a number of factors, including those described elsewhere in this prospectus and others such as:

In response to any one or more of these events, the market price of shares of our common stock could decrease significantly. In the past, securities class action litigation has often been initiated against companies following

periods of volatility in their stock price. This type of litigation could result in substantial costs and divert our management’s attention and resources, and could also require us to make substantial payments to satisfy judgments or to settle litigation.

We are an “emerging growth company” under the federal securities laws. An emerging growth company may take advantage of certain reduced reporting and other requirements that are otherwise applicable to public companies. We currently intend to take advantage of these reporting exemptions until we are no longer an “emerging growth company.” We could be an emerging growth company until the last day of the fiscal year following the fifth anniversary of this offering. We cannot predict if investors will find our common stock less attractive because we will rely on these exemptions or if taking advantage of these exemptions would result in less active trading or more volatility in the price of our common stock and our trading price may be more volatile.

Our operating results have fluctuated from quarter to quarter at points in the past, and they may do so in the future. Therefore, results of any one quarter are not a reliable indication of results to be expected for any other quarter or for any year. If we fail to increase our results over prior periods, to achieve our projected results or to meet the expectations of securities analysts or investors, our stock price may decline, and the decrease in the stock price may be disproportionate to the shortfall in our financial performance. Results may be affected by various factors, including those described in these risk factors. We maintain a forecasting process that seeks to plan sales and align expenses. If we do not control costs or appropriately adjust costs to actual results, or if actual results differ significantly from our forecast, our financial performance could be materially adversely affected.

The initial public offering price of our common stock will be higher than the net tangible book value per share of outstanding common stock prior to completion of this offering. Based on our pro forma net tangible book value as of September 30, 2020 and upon the issuance and sale of shares of common stock by us at the initial public offering price of $17.00 per share if you purchase our common stock in this offering, you will suffer immediate dilution of approximately $15.59 per share in net tangible book value. Dilution is the amount by which the offering price paid by purchasers of our common stock in this offering will exceed the pro forma net tangible book value per share of our common stock upon completion of this offering. If the underwriters exercise their option to purchase additional shares, you will experience future dilution. A total of 7,459,913 shares of common stock have been reserved for future issuance under our stock-based compensation plans, including our 2016 Plan. You may experience additional dilution upon future equity issuances or the exercise of stock options to purchase common stock granted to our directors, officers and employees under our current and future stock-based compensation plans, including our 2016 Plan.

Our Second Amended and Restated Articles of Incorporation authorize us to issue up to 250 million shares of our common stock and up to 10 million shares of preferred stock with such rights and preferences as included in our Second Amended and Restated Articles of Incorporation. Subject to compliance with applicable rules and regulations, we may issue common stock or securities convertible into common stock from time to time in connection with a financing, acquisition, investment, our equity incentive plans or otherwise. Any such issuance could result in substantial dilution to our existing stockholders and cause the market price of our common stock to decline.

We currently intend to retain our future earnings, if any, for the foreseeable future, to fund the development and growth of our business. We do not intend or expect to pay any dividends to holders of our common stock in the foreseeable future. Any decision to declare or pay dividends in the future will be made at the discretion of our

Board of Directors, taking into account various factors, including our business, operating results and financial condition, current and anticipated cash needs, plans for expansion, and any legal or contractual limitations on our ability to pay dividends. As a result, if our Board of Directors does not declare and pay dividends, your only opportunity to achieve a return on your investment in our company, if any, may be if the market price of our common stock appreciates and you sell your shares at a profit. The market price for our common stock may never exceed, and may fall below, the price that you pay for such common stock.

We expect the trading market for our common stock to be influenced by the research and reports that industry or securities analysts publish about us, our business or our industry. We do not currently have and may never obtain research coverage by securities and industry analysts. If no securities or industry analysts commence coverage of our company, the trading price for our stock may be negatively affected. We do not control these analysts. If one or more of the analysts who do cover us downgrade our stock or our industry, or the stock of any of our competitors, or publish inaccurate or unfavorable research about our business or industry, the price of our stock could decline. If one or more of these analysts ceases coverage of us or fails to publish reports on us regularly, we could lose visibility in the market, which in turn could cause our stock price or trading volume to decline.

As of September 30, 2020, our directors, executive officers and holders of more than 5% of our common stock beneficially owned, as a group, 72.3% of our common stock. After this offering, our directors, executive officers and holders of more than 5% of our common stock, together with their affiliates, will beneficially own, in the aggregate, approximately 38.1% of our outstanding common stock, assuming no exercise of the underwriters’ option to purchase additional shares of our common stock in this offering. Our principal stockholders, in the aggregate, will continue to have substantial influence over the outcome of matters submitted to our stockholders for approval, including the election of directors and any merger, consolidation or sale of all or substantially all of our assets. In addition, these stockholders, in the aggregate, will continue to have significant influence over the management and affairs of our company. Accordingly, this concentration of ownership may have the effect of:

The interests of our principal stockholders may conflict with your interests as a stockholder. You should carefully consider these potential conflicts of interest before deciding whether to invest in shares of our common stock.

After this offering, the sale of shares of our common stock in the public market, or the perception that such sales could occur, could harm the prevailing market price of shares of our common stock. These sales, or the possibility that these sales may occur, also might make it more difficult for us to sell equity securities in the future at a time and at a price that we deem appropriate.

Upon consummation of this offering, we will have a total of 63.3 million fully diluted shares (or 62.4 million basic shares excluding the impact of the Warrants) of common stock outstanding. All shares sold in this offering or issued in connection with the ERPS Conversion will be freely tradable without restriction or further registration under the Securities Act of 1933, as amended, or the Securities Act, except that any shares held by our affiliates, as that term is defined under Rule 144 of the Securities Act, or Rule 144, including our directors, executive officers and other affiliates, may be sold only in compliance with the limitations described in “Shares Eligible for Future Sale.”

The shares held by certain directors and officers and their affiliates immediately following the consummation of this offering will represent approximately 18.3% of our total outstanding shares of common stock following this

offering, based on the number of shares outstanding as of September 30, 2020. Such shares will be “restricted securities” within the meaning of Rule 144 and subject to certain restrictions on resale following the consummation of this offering. Restricted securities may be sold in the public market only if they are registered under the Securities Act or are sold pursuant to an exemption from registration such as Rule 144, as described in “Shares Eligible for Future Sale.”

In connection with this offering, we, our directors and executive officers, and certain significant holders of our common stock prior to this offering have each agreed with the underwriters, subject to certain exceptions, not to dispose of or hedge any of our or their common stock or securities convertible into or exchangeable for shares of common stock during the period from the date of this prospectus continuing through the date 180 days after the date of this prospectus, except with the prior written consent of the representatives of the underwriters. See “Underwriting” for a description of these lock-up agreements.

Upon the expiration of the contractual lock-up agreements pertaining to this offering, up to an additional 34.3 million shares that are held by directors, executive officers, and other significant stockholders will be eligible for sale in the public market and will be subject to volume, manner of sale and other limitations under Rule 144. See “Shares Eligible for Future Sale.”

As restrictions on resale end, the market price of our shares of common stock could drop significantly if the holders of these shares sell them or are perceived by the market as intending to sell them. These factors could also make it more difficult for us to raise additional funds through future offerings of our shares of common stock or other securities.

In addition, the shares of our common stock reserved for future issuance under our 2016 Plan will become eligible for sale in the public market once those shares are issued, subject to provisions relating to various vesting agreements, lock-up agreements and Rule 144, as applicable. A total of 7,459,913 shares of our common stock have been reserved for future issuance under our 2016 Plan.

In the future, we may also issue our securities in connection with investments or acquisitions. The amount of shares of our common stock issued in connection with an investment or acquisition could constitute a material portion of our then-outstanding shares of our common stock. Any issuance of additional securities in connection with investments or acquisitions may result in additional dilution to you.

We may incur costs in connection with the defense or settlement of any lawsuits filed by holders of our Exchangeable Redeemable Preferred Stock in connection with the offering described in this prospectus, the consent solicitation to amend the terms of the Exchangeable Redeemable Preferred Stock, or other matters. Such litigation could have an adverse effect on our financial condition and results of operations and could prevent or delay the consummation of the offering. If a lawsuit is filed, the defense or settlement of such lawsuit or claim that remains unresolved at the time this prospectus is deemed to be effective may adversely affect our business, financial condition, results of operations and cash flow.

The Maryland General Corporation Law (MGCL), our charter and our bylaws contain provisions that may discourage, delay or make more difficult a change in control or the removal of our directors. We are subject to Subtitle 6 of Title 3 of the MGCL, the Maryland Business Combination Act. The Business Combination Act may discourage third parties from trying to acquire control of us and increase the difficulty of consummating such an offer. We are subject to Subtitle 7 of Title 3 of the MGCL, the Maryland Control Share Acquisition Act. Our bylaws exempt from the Maryland Control Share Acquisition Act acquisitions of our common stock by any person. If we amend our bylaws to repeal the exemption from the Control Share Acquisition Act, the Control Share Acquisition Act also may make it more difficult for a third party to obtain control of us and increase the difficulty of consummating such an offer.

We have also adopted other measures that may make it difficult for a third party to obtain control of us, including provisions of our charter authorizing our Board of Directors to classify or reclassify shares of our stock

in one or more classes or series, to cause the issuance of additional shares of our stock, and to amend our charter without stockholder approval to increase or decrease the number of shares of stock that we have authority to issue. These provisions, as well as other provisions of our charter and bylaws, may delay, defer or prevent a transaction or a change in control that might otherwise be in the best interests of our stockholders. See “Description of Our Capital Stock.”

Our charter will authorize us to issue one or more series of preferred stock. Our Board of Directors, without the approval of our stockholders, will have the authority to issue shares of our preferred stock, subject to limitations prescribed by applicable law, rules and regulations and the provisions of our charter, in series, to establish from time to time the number of shares to be included in each such series and to fix the designation, powers, preferences and rights of the shares of each such series and the qualifications, limitations or restrictions thereof. Our preferred stock could be issued with voting, liquidation, dividend and other rights superior to the rights of our common stock. The potential issuance of preferred stock may delay or prevent a change in control of us, discourage bids for our common stock at a premium to the market price, and materially and adversely affect the market price and the voting and other rights of the holders of our common stock, which may reduce its value.

This prospectus and the documents incorporated herein by reference contain expressions of our opinions, expectations, beliefs, plans, objectives, assumptions, or projections regarding future events or future results and therefore are, or may be deemed to be, “forward-looking statements.” All statements, other than statements of historical fact, included or incorporated herein regarding our strategy, future operations, financial position, future revenues, projected costs, plans, prospects and objectives are forward-looking statements. Words such as “expect,” “anticipate,” “intend,” “plan,” “believe,” “seek,” “estimate,” “think,” “may,” “could,” “will,” “would,” “should,” “continue,” “potential,” “likely,” “opportunity” and similar expressions or variations of such words are intended to identify forward-looking statements, but are not the exclusive means of identifying forward-looking statements. These statements are based on our management’s current beliefs, expectations and assumptions about future events, conditions and results and on information currently available to us. Discussions containing these forward-looking statements may be found, among other places, in the Sections entitled “Business,” “Risk Factors” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations” incorporated by reference from our most recent Annual Report on Form 10-K and our Quarterly Reports on Form 10-Q, as well as any amendments thereto, filed with the SEC.

In this prospectus, forward-looking statements include statements concerning matters such as our anticipated expenditures, anticipated contract revenues, development and/or expansion of our products in commercial markets, our plans to grow our business in foreign markets, the success of our sales and marketing efforts to develop other business channels, our plans for potential acquisitions or investments, expectations as to the development of our public trading market, stock price, operating results, including our projections, and our plans for any future issuances or distributions.

By their nature, forward-looking statements involve risks and uncertainties because they relate to events and depend on circumstances that may or may not occur in the future. We believe that these risks and uncertainties include, but are not limited to, those described in the “Risk Factors” section of this prospectus, which include, but are not limited to, the following:

Although we base these forward-looking statements on assumptions that we believe are reasonable when made, we caution you that forward-looking statements are not guarantees of future performance and that our actual results of operations, financial condition and liquidity, and industry developments may differ materially from statements made in or suggested by the forward-looking statements contained in or incorporated by reference into this prospectus. Given these risks, uncertainties and other factors, many of which are beyond our control, we caution you not to place undue reliance on these forward-looking statements. Any forward-looking statement that we make in this prospectus speaks only as of the date of such statement and, except as required by law, we undertake no obligation to update any forward-looking statement publicly, or to revise any forward-looking statement to reflect events or developments occurring after the date of this prospectus, even if new information becomes available in the future. Comparisons of results for current and any prior periods are not intended to express any future trends or indications of future performance, unless specifically expressed as such, and should only be viewed as historical data.

We estimate that we will receive net proceeds of approximately $235.8 million (or approximately $271.3 million if the underwriters’ option to purchase additional shares is exercised in full) from the sale of approximately 14.97 million shares of common stock offered by us in this offering, based on the initial public offering price of $17.00 per share, and after deducting underwriting discounts and commissions and estimated offering expenses payable by us.

We expect to use approximately $109.1 million of the net proceeds we receive from this offering in connection with the ERPS Conversion, as described in the section entitled “Exchangeable Redeemable Preferred Stock Conversion.” In addition, we expect to use approximately $30 million of the net proceeds from this offering to fund our acquisition of the outstanding Class B Units of Telos ID, as described in the section entitled “Purchase of Telos ID.”

We also intend to use approximately $20.9 million of the net proceeds to repay our outstanding senior term loan and subordinated debt. Our senior term loan has a maturity date of January 15, 2021 and accrues interest at the rate of 13% per annum. Our subordinated debt has a maturity date of July 25, 2022 and accrues interest at the rate of 6% per annum.

We intend to use the remaining net proceeds for general corporate purposes. We also may use a portion of the net proceeds to acquire complementary businesses, products, services, or technologies. However, we do not have agreements, commitments, or plans for any specific acquisitions at this time.

The amounts and timing of our actual use of the net proceeds will vary depending on numerous factors. As a result, our management will have broad discretion in the application of the net proceeds, and investors will be relying on our judgment regarding the application of the net proceeds of this offering. Proceeds held by us will be invested in short-term investments until needed for the uses described above.

We currently anticipate that we will retain all available funds for use in the operation and expansion of our business, and we do not anticipate paying any cash dividends on our common stock in the foreseeable future.

The following table presents our cash and cash equivalents and capitalization as of September 30, 2020:

You should read this information together with our consolidated financial statements and related notes included in this prospectus and the sections titled “Selected Financial Data” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations” in this prospectus and incorporated by reference in this prospectus. The following amounts are in thousands.

If you invest in our common stock in this offering, your interest will be diluted to the extent of the difference between the initial public offering price per share of our common stock and the pro forma as adjusted net tangible book value per share of our common stock immediately after the closing of this offering.

Our pro forma net tangible book value of our common stock as of September 30, 2020 was ($129.5) million, or ($2.68) per share, based on the number of shares of our common stock outstanding as of September 30, 2020 and after giving effect to (i) the ERPS Conversion, (ii) the purchase of Telos ID, (iii) the repayment of outstanding senior and subordinated debt, and (iv) the issuance of 812,462 shares of common stock upon the cashless exercise of the Warrants. Pro forma net tangible book value per share represents our total tangible assets less our total liabilities, divided by the number of outstanding shares of common stock, and after giving effect to the ERPS Conversion.

After giving effect to the receipt of the net proceeds from our sale of approximately 14.97 million shares of common stock in this offering at the initial public offering price of $17.00 per share after deducting underwriting discounts and commissions and estimated offering expenses payable by us, our pro forma as adjusted net tangible book value as of September 30, 2020, would have been $89.1 million, or $1.41 per share. This represents an immediate increase in pro forma as adjusted net tangible book value of $4.09 per share to our existing shareholders and an immediate dilution of $15.59 per share to investors purchasing common stock in this offering.

We calculate dilution per share to new investors by subtracting the pro forma net tangible book value per share from the initial public offering price paid by the new investor. The following table illustrates the dilution to new investors on a per share basis:

If the underwriters’ option to purchase additional shares to cover over-allotments is exercised in full, the pro forma as adjusted net tangible book value per share after giving effect to this offering would be $1.89 per share, representing an immediate increase to existing shareholders of $4.57 per share, and immediate dilution to new investors in this offering of $15.11 per share.

The foregoing calculations exclude 7,459,913 shares of common stock reserved for future issuance pursuant to our 2016 Plan.

Telos Corporation offers technologically advanced, software-based security solutions that empower and protect the world’s most security-conscious organizations against rapidly evolving, sophisticated and pervasive threats. Our portfolio of security products, services and expertise empower our customers with capabilities to reach new markets, serve their stakeholders more effectively, and successfully defend the nation or their enterprise. We protect our customers’ people, information, and digital assets so they can pursue their corporate goals and conduct their global missions with confidence in their security and privacy.

Our customer base consists of the U.S. federal government, large commercial businesses, state and local governments, as well as international customers. Our federal government customers include the Department of Defense (“DoD”), the Central Intelligence Agency (the (“CIA’’) and multiple other agencies within the Intelligence Community (“IC”), and multiple civilian agencies, including the Department of Homeland Security (“DHS”), U.S. Department of State (“DoS”), and the Federal Bureau of Investigation (“FBI”). Our commercial customers include Fortune 500 enterprises such as Amazon.com, Inc., Citigroup Inc., Microsoft Corporation, and salesforce.com, inc. We have conducted business with over 350 customers in each of the last three years. For the nine months ended September 30, 2020, approximately 50% of our revenue was derived from sole source contracts or contracts for which we had limited competition. Our customers are highly targeted by cyber attackers and require continuous real-time insights to make informed decisions about how to effectively balance the constraints of security risk with the freedom to act and decide in the best interests of the organization and the greater good of the public. Our advanced security solutions help protect and ensure confidence in the information that is vital to the world’s most important commercial and governmental organizations, national security, and mission success for the warfighter.

Our revenue growth trajectory began to accelerate in 2018 as we increased our investment into new products and solutions. Our security solutions are the ultimate product of the investment of approximately 3,000 man-years developing our intellectual property and highly sophisticated software technology. These investments helped us expand with commercial customers, as well as win additional contracts within the military and the IC. Revenue grew from $107.7 million in 2017 to $138.0 million in 2018 and to $159.2 million in 2019, representing annual growth rates of 28.1% and 15.4%, respectively. Once our security solutions are imbedded in our customers’ technology infrastructure, these customer relationships often expand and lead to us providing additional security solutions. As a consequence, we believe that our customer turnover is low and, based on historical experience, approximately 85% of our revenue is recurring, as discussed further below.

Our business consists of solution sales that generally are renewed on an annual basis and large programs that are executed through long-term contracts, often five to ten years in duration. We believe that the nature of our work lends itself to trusted and long-term relationships with our customers, which results in a high recurrence of ongoing customer revenue streams. As a result, much of our revenue is highly predictable.

We develop our annual budgeted revenue by estimating for the upcoming year our continuing business from existing customers and active contracts. We consider backlog, both funded and unfunded (as explained below), other expected annual renewals, and expansion planned by our current customers. In the context of our current customer portfolio, we view “recurring revenue” as revenue that occurs often and repeatedly. In each of the last three years, recurring revenue has exceeded 85% of our annual revenue. Our total budgeted revenue is the combination of recurring revenue and a forecast of new business.

Total backlog, a component of recurring revenue, consists of the aggregate contract revenues remaining to be earned by us at a given time over the life of our contracts, whether funded or unfunded. Funded backlog consists of the aggregate contract revenues remaining to be earned at a given time, which, in the case of U.S. government contracts, means that they have been funded by the procuring agency. Unfunded backlog is the difference between total backlog and funded backlog and includes potential revenues that may be earned if customers exercise delivery orders and/or renewal options to continue these contracts. Based on historical experience, we generally assume option year renewals to be exercised. Most of our customers fund contracts on a basis of one year or less and, as a result, funded backlog is generally expected to be earned within one year from any point in time, whereas unfunded backlog is expected to be earned over a longer period.

We expect our growth to accelerate beginning in 2021 and 2022 due to, among other factors, recent contract awards that are significant to our business. Notable recent awards include an expanded contract with a U.S.

government agency for our Telos Ghost® managed intelligence support solution and contract wins under the Transportation Security Administration (“TSA”) PreCheck™ enrollment program and a program with The Centers for Medicare and Medicaid Services (“CMS”). We believe the Telos Ghost contract will generate approximately $4 million to $5 million of incremental revenue in 2021 and represents a platform for potential further growth through military and civilian government units during and after 2021. The TSA PreCheck™ enrollment program – a 10-year contract on which we are one of three vendors – is expected to launch in early 2021. TSA estimates the market for TSA PreCheck™ enrollments is 2 million to 5 million travelers annually over the term of the contract, and we believe that the share of those enrollments we may secure on an average annual basis over that term should grow to approximately 30% to 40% of those travelers. We anticipate charging $85 for each TSA PreCheck™ membership transaction, with the possibility that additional revenue may be generated from co-marketing efforts. The CMS program – a 10-year indefinite delivery/indefinite quantity contract under which we anticipate providing services beginning in 2021 – involves our FBI-certified biometric enrollment solution. CMS estimates that approximately 1.5 million healthcare workers will obtain background checks annually under the program, and we believe we are well-positioned to secure this work over the 10-year contract term. Based on these and other assumptions, we believe these programs collectively may grow from a base of approximately $11 million in revenue in 2020 to between $75 million and $80 million in revenue and in excess of $135 million in revenue in 2021 and 2022, respectively. For these reasons, we anticipate these recent contract awards, combined with our organic growth as well as other opportunities for business expansion, to contribute to rapidly accelerating revenue growth beginning in 2021 and 2022.

With the proceeds from this offering, we intend to pursue additional opportunities to grow revenue, expand margins, simplify our capital structure, and repay our outstanding senior and subordinated debt. Specifically, we intend to expand our internal direct sales force, build sales and distribution channels for our products, and continue to invest in research and development. We also intend to repurchase the non-controlling interest in Telos ID for $30 million in cash and 7.3 million shares of our common stock, convert our Exchangeable Redeemable Preferred Stock (with accrued principal and dividends of approximately $142.6 million) for $109.1 million of cash and approximately 1.1 million shares of common stock, and repay $20.9 million of debt.

Our mission is to protect our customers’ people, systems, and vital information assets with offerings for cybersecurity, cloud security, and enterprise security. In the current global environment, our mission is more critical than ever. The emergence of each new ICT introduces new vulnerabilities, as security is still too often overlooked in solution development. Networks and applications meant to enhance productivity and profitability often jeopardize an organization due to poor planning, misconfiguration, or an unknown gap in security. Ransomware, insider threats, cybercrime, and advanced persistent threats continue to menace public and private enterprises across all industries.

Cybersecurity, cloud security, and enterprise security of the modern organization share much in common, yet also call for a diverse range of skills, capabilities, and experience in order to meet the requirements of security-conscious customers. Decades of experience in developing, orchestrating, and delivering solutions across these three domains gives us the vision and the confidence to provide solutions that empower and protect the enterprise at an integrated, holistic level. Our experience in addressing challenges in one area of an enterprise helps us meet requirements in others. We understand that a range of complementary capabilities may be needed to solve a single challenge, and we also recognize when a single solution might address multiple challenges.

Our security solutions span across the following domains:

Our market includes organizations in business across industry verticals, government, and the military. We believe that digital transformation is a reality for these organizations and that the ICT systems they depend on for their success and security are subject to unprecedented levels of stress, threat, and attack. Market-disrupting technologies, a global pandemic, and economic uncertainty make it difficult for customers to plan for business expansion, develop new programs in service to the public, or prepare military forces for the nation’s defense. Public and private enterprises alike face the following dynamic challenges that threaten their security:

The networked nature of enterprise technologies and the ability to work outside the organizational perimeter result in increased risk and the constant threat of attack. In particular, the cloud adds new complexities due to the shared responsibility of cloud security and the need to manage and maintain the compliance of cloud-based resources.

Our solutions across a wide variety of use cases are designed to address our customers’ proliferating need to understand and address cybersecurity risk, reduce organizational attack surface, enhance enterprise mobility, expand adoption of cloud computing, and manage and protect identities in an increasingly dynamic and intensifying threat landscape. By addressing the breadth of our customers’ complex and evolving needs, we believe that our total addressable market in 2021 for the security services and products that we provide is over $80 billion.

We refer to our cyber and cloud applications as Security Solutions, which includes Information Assurance / Xacta® (previously referred to as Cyber & Cloud Solutions), Secure Communications (previously referred to as Secure Communications Cyber and Enterprise Solutions), and Telos ID (previously referred to as Telos ID Enterprise Solutions). We refer to our offerings for enterprise security as Secure Networks (previously referred to as Secure Mobility and Network Management/Defense Enterprise Solutions).

Security Solutions revenue was $101.9 million and $86.6 million in 2019 and 2018, respectively. This increase in 2019 of approximately 18% is primarily attributable to a $10.1 million increase in sales of offerings in Telos ID on a contract with the U.S. Census Bureau and a $6.3 million increase in sales of offerings related to a contract with a U.S. government agency for our Telos Ghost managed intelligence support solution in Secure Communications. For the nine months ended September 30, 2020 and 2019, Security Solutions revenue was $92.6 million and $71.6 million, respectively. Improved performance was driven primarily by an increase of $16.5 million in sales of offerings in Telos ID on the contract with the U.S. Census Bureau and $6.5 million in sales of offerings related to the contract with a U.S. government agency for our Telos Ghost managed intelligence support solution in Secure Communications. For the nine months ended September 30, 2020 and 2019, Security Solutions gross profit was $38.8 million and $28.9 million, respectively.

Secure Networks revenue was $57.3 million in 2019 and $51.4 million in 2018. The sales increase in 2019 is the result of various DoD contracts around our Secure Mobility as well as our Network Management and Defense offerings. For the nine months ended September 30, 2020, Secure Networks revenue was $42.4 million, up 3% from $41.1 million over the same period in 2019. The year-over-year improvement for the interim period in 2020 resulted from various DoD contracts, primarily in our Secure Mobility offerings. For the nine months ended September 30, 2020 and 2019, Secure Networks gross profit was $7.6 million and $6.4 million, respectively.

Xacta delivers automated cyber risk and compliance management solutions to large commercial and government enterprises. Xacta is sold as a solution, which includes Xacta technology and Xacta subject matter experts (“SMEs”) to help with deployment, on-going support, and training to ensure rapid and long-term customer success. Our solution-based business model provides predictable, recurring, and growing revenue year-on-year.

Xacta disrupted the cyber risk and compliance management industry 20 years ago. When it was first introduced, Xacta represented a new way of doing business that challenged the inefficient labor-intensive business models of traditional consultants and government contractors who charge by the hour.

We have developed and evolved Xacta over the past two decades to make security risk and compliance activities more efficient through workflow-based automation. Many cyber risk and compliance management activities can

be automated, which greatly reduces the need for inefficient Time and Materials (“T&M”) services. More importantly, we believe that certain critical capabilities like continuous monitoring are effectively impossible without automation.

Xacta is the de facto commercial cyber risk and compliance management solution across the U.S. federal government. Noteworthy U.S. government enterprise customers include DoD, multiple agencies within the IC (including the CIA), and civilian agencies such as DHS, DoS and the FBI. Xacta cloud security is also being adopted by very large commercial organizations like Amazon Web Services (“AWS”) and Microsoft Azure.

Across these government and commercial customers, we currently have hundreds of Xacta deployments used to manage tens of thousands of mission critical/national security systems that are comprised of millions of critical information technology (“IT”) assets and cloud resources. There are also more than 20,000 cyber security professionals who actively use Xacta to manage cyber risk for a wide range of IT/information systems in warfighting, intelligence, business/financial, and healthcare applications.

 

In 2016, at the request of the CIA, we evolved Xacta from an on-premises cyber risk and compliance management solution, used to manage traditional IT assets, to a solution that also manages cloud resources. As a result, we believe that Xacta is unique in its ability to manage complex hybrid IT environments that span on-premises, cloud, and multi-cloud. Our cloud focus has attracted the attention of the largest cloud and cloud service providers in the world, many of which are now our partners and customers. These partnerships have greatly increased our market opportunity, as many organizations look to migrate to the cloud. Security compliance remains a major inhibitor to cloud adoption. Xacta addresses this issue by automating and accelerating security compliance activities allowing organizations to migrate to the cloud more quickly and securely.

Recognizing these advantages, the two largest cloud providers in the world, AWS and Microsoft Azure, have partnered with Telos to use Xacta to accelerate security compliance activities in their air-gapped and global sovereign cloud environments to help hundreds of thousands of regulated organizations address security risk and compliance much more efficiently.

We collaborated with the CIA and AWS on a case study titled: The Quest for Continuous Authority to Operate, to describe the benefits of Xacta. The following statements were made in the case study:

 

Rick Trinidad, Worldwide Public Sector, AWS

 

Carl J. “CJ” Moses, Deputy CISO, AWS

 

John Nicely, C2S Sponsor, US Government

And, we have become integrated into the Microsoft Azure cloud in order to speed the compliance process that will accelerate our mutual customers’ ability to move their workloads to Microsoft Azure:

 

Tom Keane, corporate vice president, Azure Global at Microsoft Corporation

 

Lily Kim, General Manager, Azure Global at Microsoft Corporation

Our cloud focus has also resulted in significant partnerships with other cloud organizations, such as Rackspace Technology, Inc., which are helping SaaS vendors address cloud compliance requirements, including the Federal Risk and Authorization Management Program (“FedRAMP”), which is required by the federal government for all SaaS solutions. There are thousands of potential SaaS applications needed by the federal government. These organizations understand that Xacta’s ability to reduce the security compliance burden helps accelerate cloud adoption and generates cloud usage and revenue more quickly. To this end, Xacta’s capabilities are viewed as a strategic advantage by these cloud-centric organizations.

Managing cyber risk is top-of-mind for many organizations today. There is an increasing number of security standards and regulations with which global organizations must comply. The National Institute of Standards and Technology (NIST) is the source for many security standards that are being adopted globally. Telos, using Xacta, has specialized in supporting NIST-based standards for nearly 20 years. We have been considered by a leading, third-party consultancy to be NIST-based cybersecurity domain experts. These trends, coupled with our technology leadership and experience over the past 20 years, significantly expand our near-term addressable market.

Xacta offers a number of critical and differentiated capabilities that support a wide range of cyber risk and compliance management use cases, such as:

Many of these features are not available with our traditional competitors’ solutions.

Xacta was launched in August 2000 and was the first automated solution of its kind. Xacta was initially created to help U.S. government organizations satisfy demanding security risk and compliance management requirements. Over the years, commercial and international demand for the solutions provided by Xacta has grown rapidly.

In 2004, Xacta was enhanced to provide industry-first automated continuous monitoring functionality.

Between 2002 and 2005, Telos was issued five patents in the area of security risk and compliance management, including one patent for what is now known as continuous monitoring. Since then, numerous technical enhancements have been made to Xacta, some of which are described above in “Xacta’s Critical Capabilities.”

 

Xacta supports other NIST frameworks such as the NIST Cybersecurity Framework (“CSF”), which was established in 2014 via Executive Order 13636 to help commercial organizations in the 16 DHS-defined critical infrastructure sectors improve their cyber risk posture. Executive Order 13800, issued in 2017, requires federal agencies to adopt the CSF, and it is also being adopted by many countries as a national cybersecurity standard.

Xacta also currently supports various vendor/supply chain risk management standards such as NIST Special Publication 800-161 and NIST Special Publication 800-171. NIST 800-171 is a contractual requirement for approximately 70,000 commercial companies that support the U.S. federal government.

Xacta will also support an emerging standard called Cybersecurity Maturity Model Certification, which will soon be required by approximately 300,000 commercial organizations that support DoD.

Xacta has highly customizable workflows that can be configured to support most any cybersecurity/risk and compliance management frameworks. To that end, Xacta can support national and international security compliance standards such as HIPAA, PCI-DSS, ISO 27000, and many others.

Xacta does not require a customer to abandon (i.e. rip and replace) its existing solutions – rather it works with the customer’s prior software choices and uses those software choices as data feeds so that Xacta can perform automated (and continuous) security compliance validation.

Our goal is to make Xacta the default security risk and compliance management solution of choice for commercial and government entities across the globe that seek continuous compliance with cybersecurity and risk management frameworks and standards.

As set forth in the table below, the segment of the security industry where Xacta competes is estimated to be $37 billion in 2021 and is forecasted to grow at a compound annual growth rate of 13.4% from 2020 to 2025. We believe that there is significant opportunity for Xacta to grow market share within this segment over that time.

Xacta use cases include audit management, compliance management, inventory management, vulnerability management, continuous compliance monitoring, vendor/supply chain risk management, cyber risk management, risk remediation management, and security authorizations. These use cases are broadly applicable across industry verticals globally and help explain the large and expanding market in which Xacta participates.

 

As cyber threats have increased in scope and scale and the consequences of hacks and breaches have grown, we have developed a solution that enables organizations to work on the internet without being detected. In 2019, we introduced Telos Ghost, which allows our customers to shield communications, transactions, and even their very presence on the web from the view of cyber adversaries.

Conceived on the notion that “you can’t exploit what you can’t see,” Telos Ghost provides organizations a virtually anonymous way to do business, connect with global resources, and conduct research online. Telos Ghost is a virtual obfuscation network-as-a-service that:

 

Telos Ghost seeks to eliminate cyber-attack surfaces by obfuscating and encrypting data, masking user identity and location, and hiding network resources. It provides the additional layers of security and privacy needed for intelligence gathering, cyber threat protection, securing critical infrastructure, and protecting communications and applications when operations, property, and even lives can be jeopardized by a single error in security.

Telos Ghost is currently utilized by DoD, the IC, and commercial organizations for supply chain security, cyber threat intelligence, cybersecurity red teaming, and investigation and recovery services.

Other emerging markets and use cases for Telos Ghost include protecting systems, records, transactions, and personnel in industries and applications such as remote workforce protection; law enforcement; banking and financial services; healthcare; industrial control systems/IoT; video surveillance networks; and others.

Key differentiators that we believe set Telos Ghost apart in the market include that it:

We believe, based on a use case model of targets that would benefit from Telos Ghost, that the total addressable market for Telos Ghost will be over $13 billion in 2021, with a compound annual growth rate estimated at 17.2% through 2025.¹

Telos AMHS is used by military field operatives for critical communications on the battlefield. Since 1999, it has been one of our signature security solutions and has been one of the most widely used organizational messaging products in DoD and other agencies charged with defending U.S. national security.

Telos AMHS is designed to support a range of secure messaging services to a worldwide community of U.S. military, government, and allied customers operating in both strategic and tactical environments. It is used to securely transmit messages that provide direction and establish a formal position, commitment, or response requiring the authority of an organization, rather than an individual, including:

Because Telos AMHS supports timely and reliable delivery for authoritative communications, its uses include terrorist warnings, “eyes-only” messages, military execution orders, intelligence information, overflight clearances, and Emergency Action Messages for nuclear command and control. Information exchange at this level and for these purposes requires operational requirements for time-sensitive, guaranteed delivery, precedence, high availability, and reliability.

Telos AMHS is the only web-based solution for assured messaging and directory services using the Defense Information System Agency’s (“DISA”) Organizational Messaging Service and its specialized communications protocols. With Telos AMHS, users are able to send and receive rich-text messages across security domains and in different formats using plain language addressing. Users can search messages, archive messages, and send attachments up to 200MB to accommodate photos and videos, including those of terrorists, most wanted notices, maps, and satellite images.

More than fifty organizations around the world depend on Telos AMHS, including the Joint Staff, combatant commands, military services, defense agencies, federal agencies, and the IC. AMHS provides a proven return on investment over alternative organizational messaging offerings and has been implemented on a SaaS basis by an increasing number of organizations. We are planning for market expansion of Telos AMHS to NATO and allied member nations across the globe.

We believe that the AMHS offering has expansion possibility and an addressable market consisting of the U.S. government and NATO allies around the world.

Telos ID provides trusted identity and digital services that are critical for the delivery of vital citizen services that millions of Americans rely on each year. Access to these vital services requires a robust and reliable infrastructure comprised of advanced technologies, facilities, and professional staff members that can effectively deliver these services around the world.

We have transformed the Telos ID business model by leveraging a SaaS approach. We utilize our partnerships with AWS and ServiceNow, and we have fully integrated a robust suite of customer service, cybersecurity, and performance monitoring tools that align with DHS’s CDM Program that are designed to enable us to quickly deliver SaaS or turn-key solutions to our federal customers. Our digital platform extends web, mobile, and client applications that also drive professional services and product licensing opportunities. Our services are differentiated because our back-end system is intended to interface with critical homeland security and law enforcement systems and are tightly coupled with a mature, modern cloud-based platform that can scale to support large federal, state, local, and commercial programs.

We maintain government certifications and designations that distinguish Telos ID, including TSA PreCheck™ enrollment provider, Designated Aviation Channeling provider, FBI-approved Channeler, and the Financial Industry Regulatory Authority (“FINRA”) Electronic Fingerprint Submission provider. We are the only commercial entity in our industry designated as a Secure Flight Services provider for terrorist watchlist checks.

Our strategic partners offer retail and on-demand service channels that further differentiate our offerings. Our established global logistics infrastructure provides responsive supply chain support. We operate a full-service call center with chat-bots, AI, and virtual agent support, all of which contribute to scalability. Our network and security operations centers align with U.S. Computer Emergency Readiness Team and CDM best practices.

 

Telos ID's digital trusted identity platform — IDTrust360® — is a leading, fully integrated suite containing Internet of Things (IoT), Machine Learning (ML), Artificial Intelligence (AI), and other advanced cloud-hosted products and services that deliver identity trust, multi-modal biometric capture and matching, identity assurance, identity vetting, document validation, credentialing, personnel security, case management, call center support, cyber security, network and security operations, service management, integrated logistics, and numerous other features and functions. Its open architecture is supported by a flexible API gateway and a robust workflow engine that can efficiently extend individual services or offer the entire platform as a SaaS or turn-key solution for our customers. IDTrust360® is the only commercially owned and operated platform on the market with direct interfaces to the FBI's criminal records, DHS's terrorist watch list service, Treasury's pay.gov, other government identity risk management systems, and numerous commercial identity, intelligence, and risk-based data sources. We are actively engaged with federal customers to integrate vital event records, government identification document records, and other fingerprint-based biometric records hosted across multiple agencies. This enables Telos ID exclusively to offer NIST-compliant digital identity services aligned with federal security mandates. IDTrust360® extends web, mobile, and client applications within a fully-integrated low-code development environment for rapid application development. The environment meets FISMA High certification standards and is NIST 800-53 certified within multiple federal agencies, while boasting 99.998% availability performance and enterprise-level scalability. IDTrust360 leverages leading cyber security and network monitoring tools aligned with DHS Continuous Diagnostics & Mitigation and industry best practices for strengthening network defense and enhancing the resiliency of our infrastructure necessary for managing and protecting millions of identity records, sensitive information, and end-point hardware components deployed across thousands of sites around the world for customers operating within defense, homeland security and law enforcement, financial, health, commerce, transportation, retail, and other market segments.

In sum, we believe that our identity solutions are uniquely positioned to disrupt the market. Our technology stack is fully integrated and leverages cloud, mobility, AI, machine learning, and other capabilities. We have the necessary certifications, experience, contracts, and government system interfaces. Additionally, our systems are accredited against stringent government security requirements across multiple government agencies.

We believe that our identity offerings and capabilities transcend several addressable market sectors that include digital identity, biometrics, identity and access management, identity verification, and employment screening for a total addressable market of over $30 billion in 2021, with an average annual growth rate through 2025 of 12.9%.

Nearly 20 years ago, we were the first non-government solutions provider to receive approval to design and deliver secure wireless solutions to DoD. That authorization to operate enabled us to build a very large footprint within DoD and the U.S. Air Force. As a result, we have a long track record of enabling our customers to work remotely and securely. Given the depth of our relationships, when one of our customers elects to modernize its remote mobility infrastructure, it frequently chooses to work with us. Within the U.S. Air Force and supporting DoD communities, we have designed and delivered enterprise-level secure mobile networks on every active duty, Air National Guard, and Air Force Reserve site worldwide.

Our secure mobility team brings credentials to every engagement, supplying deep expertise and experience as well as highly desirable clearances and industry recognized certifications for network engineering, mobility, and security. We also foster and maintain key industry partnerships, offering insight into technology advances and early access to new secure mobility solutions.

On a managed basis, we offer a broad suite of services needed to operate, administer, and defend complex enterprise networks, giving our customers the benefit of these capabilities without having to commit to the cost

and burden of providing the services for themselves. We have the expertise to manage and defend large-scale enterprises and have been successful at hiring and retaining personnel with the necessary key skills and security clearances.

Our diverse portfolio of capabilities addresses common and uncommon requirements in many industries and disciplines, ranging from the military and government agencies to Fortune 500 companies. Our offerings enable our customers to:

We estimate that the total addressable market for our offerings for enterprise security within Secure Networks is approximately $10 billion per year.

We are pursuing multiple strategies in order to grow the company, in both our commercial and government business end markets in the United States and abroad. Our key strategies are:

We typically focus on large government and commercial organizations that have demanding security requirements and/or complex cyber security risk and compliance management objectives.

Customer acquisition often involves extensive interaction at all levels of the organizations from users to executives and decision makers. We seek to forge relationships throughout an organization in an effort to obtain broad consensus as part of the sales process. Currently, the customer acquisition process is largely driven by direct sales activity.

As a result of the long tenure of many of our employees, many of our sales and business development executives have trusted relationships that have developed over many years. We augment these trusted relationships with senior leaders who have retired from the military, civil service, and various related industries. Many of these individuals are our employees. Additionally, we recently established an Advisory Board, which is led by General (USA Ret.) Keith Alexander (see “Management”). These leaders provide our sales team with access to high level contacts that would be difficult to achieve otherwise.

Our sales executives are supported by an inside sales team that works with the Telos marketing team on various awareness campaigns where sales leads are obtained, vetted, and pursued via proactive outreach (calls, email, etc.).

Metrics are tracked using a formal CRM process and used to equip the sales executives with useful sales data. Our sales team works hand in hand with our marketing team and various subject matter experts to develop target awareness campaigns for our various solutions that generate valuable leads and contacts.

Our sales strategy is to establish a customer-foothold with one of our solutions and work to achieve rapid success. We then leverage this customer relationship to expand usage of other Telos solutions. We have a variety of upsell opportunities that allow us to expand our presence within a customer account. For example, there are various complementary Xacta features that build on each other and are sold separately. Additionally, our sales team is responsible for selling all Telos solutions. This allows a sales executive to quickly identify demand for other Telos solutions in existing accounts.

Our sales team also works with partner organizations like AWS, Microsoft Azure, and Rackspace Technology, Inc. to pursue mutual customers. These relationships represent our current channel sales strategy that we are in the process of expanding. We are also actively working with Singapore Technologies Engineering, Limited, which is helping us gain access to the Asian market for cyber security solutions.

We plan to expand our direct sales capability for markets in which we are well-known, such as the U.S. government, certain critical infrastructure sectors, and certain commercial verticals like healthcare and financial services. We also plan to expand our channel sales capability to gain rapid access to other commercial verticals and international markets.

We will be increasing our investment in sales and marketing with the goal of increasing sales of our security solutions, and acquiring customers in a variety of verticals. In 2021, we are planning on implementing an approximate 300% increase from our 2020 sales and marketing investment. We currently have less than 10 salespeople at Telos who carry quotas that they are expected to meet. We plan on adding direct, quota-driven, in-house sales assets to focus on commercial accounts. We will focus Xacta and Telos Ghost sales efforts in the banking/financial services and insurance sector, healthcare, energy, and other critical infrastructure protection markets. We will also be investing in additional lead generation tools, financial incentives and marketing programs.

Our partner program will include a variety of channels, including resellers, technical/integrators, and consulting partners to help us accelerate access and implementations in new markets, particularly commercial and international. Currently, we participate in Microsoft and AWS partner programs, which incentivize their respective sellers to promote Telos security solutions (e.g. Xacta and Telos Ghost).

As part of the sales and channel program investment, we are also making corporate investments in functional areas such as contracts, solution architects and operations.

Much of our business is awarded through submission of formal competitive bids, though about 50% is awarded through limited competition or sole source contracts.

We build market awareness of Telos and our solutions through a variety of marketing programs, including regular briefings with industry analysts, public relations activities, government relations initiatives, web seminars, trade show exhibitions, speaking engagements and web site marketing. We will be making additional investments in these types of activities and targeting additional vertical specific content creation, targeted advertising and brand awareness campaigns, social media campaigns, and search engine marketing. When appropriate, we will engage in joint marketing activities with our channel, technology and consulting partners.

We operate in a highly competitive marketplace. There are other companies that provide solutions similar to ours. Although these companies provide offerings that overlap with some of our solutions, we are not aware of any single company that provides competitive solutions in all of the areas where we compete. The primary companies with which our solutions compete range from security solutions and software organizations such as CLEAR (operated by Alclear, LLC), Cutting Edge, IDEMIA, MetricStream Inc., Palantir Technologies Inc., RSA Archer, ServiceNow, Inc., and Unisys Corporation, to more traditional government services integrators that provide products and services such as Booz Allen Hamilton Inc., General Dynamics Corporation, Lockheed Martin Corporation, Northrop Grumman Corporation, and Science Applications International Corporation.

The majority of our business is in response to competitive requests from potential and current customers. Decisions regarding contract awards by our customers typically are based upon an assessment of the quality of our past performance, responsiveness to proposal requirements, uniqueness of the offering itself, price, and other competitive factors.

Aside from other companies that compete in our space, we sometimes face indirect competition from solutions that are developed “in-house” by some of our customers.

As September 30, 2020, we had 808 employees, of which approximately 60% held security clearances.

Our people are proficient in a wide variety of fields such as computer science, information security and vulnerability testing, networking technologies, physics, engineering, operations research, mathematics, economics, and business administration, and more than 75% of our employees have technical backgrounds. We place a high value on our people. As a result, we seek to remain competitive in terms of salary structures, incentive compensation programs, fringe benefits, opportunities for growth, and individual recognition and award programs.

Our management team is committed to maintaining a corporate culture that fosters mutual respect and job satisfaction for our people, while delivering innovation and value to customers and shareholders. This commitment is reflected in our core values:

Always with integrity, at Telos we:

These values are woven throughout the fabric of Telos. They are reflected in our hiring practices, reinforced regularly, and reviewed during appraisals. They are written into annual and quarterly objectives for staff and managers alike, as well as department and company business goals. Employees are encouraged to challenge themselves and each other to exhibit the core values in everyday activities.

Our employees also are given avenues of communication and interaction should they observe activities that are inconsistent with our core values. Encouraged first to speak openly about any issues, a hotline provides an opportunity to express concerns anonymously.

We consider the foundational value of integrity to be a non-negotiable requirement of employment, and an expectation of suppliers, partners, and our customers. We guard our reputation and will take aggressive action to protect it. An essential part of our brand promise is that we always engage employees, customers, partners, suppliers, and investors with integrity.

The following table provides information regarding our executive officers and directors as of the filing of this prospectus:

John B. Wood - Mr. Wood joined the Company in 1992 as Executive Vice President and Chief Operating Officer (“COO”) and in 1994 was named President and Chief Executive Officer (“CEO”) until March 2000, when he was appointed to the newly created position of Executive Chairman of the Board. In 2002, he became Chairman of the Board subsequent to a restructuring of the Board of Directors. In January 2003, Mr. Wood resumed the positions of President and CEO. Mr. Wood also holds the position of Chairman of the Board for Telos Identity Management Solutions, LLC (“Telos ID”) at the request of the Company. Prior to joining the Company, Mr. Wood worked on Wall Street for Dean Witter Reynolds, UBS Securities, and his own boutique investment bank. Mr. Wood graduated from Georgetown University where he earned a Bachelor of Science in Business Administration in finance and computer science. Mr. Wood also serves on several advisory boards and one foundation board. Mr. Wood is the brother of Mr. Emmett J. Wood, the Executive Vice President, Marketing & Strategy, of the Company.

As the Chief Executive Officer of the Company, Mr. Wood provides the Board with not only the knowledge of the daily workings of the Company, but also with the essential experience and expertise that can be provided

only by a person who is intimately involved in running the Company. Mr. Wood’s broad knowledge and experience with the Company, its stockholders, partners, customers, and vendors resulting from his long tenure with the Company are invaluable to the Board.

Michele Nakazawa - Ms. Nakazawa joined the Company in March 2004 as Vice President and Controller. Ms. Nakazawa was promoted to Senior Vice President and appointed to serve as CFO in January 2005, and promoted to Executive Vice President in 2008. Ms. Nakazawa also serves as Treasurer for Telos ID at the request of the Company. Ms. Nakazawa has over 30 years’ experience in finance and accounting. Prior to joining the Company, she held various positions, including CFO of Ubizen, Inc., a U.S. subsidiary of a publicly held Belgian company, from 1999 to 2003; Controller and Treasurer of National Security Analysts, Inc. from 1991 to 1997; and financial analyst for Federal Systems Division of IBM, Inc. from 1983 to 1990. Ms. Nakazawa is also a former Director and Treasurer for HealthWorks for Northern Virginia, a non-profit community health center. Ms. Nakazawa is a Certified Public Accountant and holds a Master’s of Science in Accounting from American University and a Bachelor of Arts in Chemistry from Goucher College.

Edward L. Williams - Mr. Williams joined the Company in 1993 as a Senior Vice President responsible for finance, pricing, purchasing, and Defense Contract Audit Agency compliance. In 1994, his responsibilities were expanded to include accounting and business development. In 1996, Mr. Williams was assigned to manage the Company’s networking business unit. In 2000, his responsibilities were expanded to include management of the Company’s operations. Mr. Williams was named Executive Vice President and COO in 2003 and Interim CFO from October 2003 until January 2005. Prior to joining the Company, Mr. Williams was the CFO for Centel Federal Systems and M/A.com Information Systems, both of which are U.S. government contractors. Mr. Williams has a Bachelor of Science in Finance from the University of Maryland.

Jefferson V. Wright - Mr. Wright joined the Company on December 31, 2012 as Executive Vice President and General Counsel. Prior to joining the Company, Mr. Wright was a principal at Miles & Stockbridge P.C., a leading Mid-Atlantic regional law firm with its principal office in Baltimore, Maryland, where he practiced law for approximately 31 years and served on its leadership team and as general counsel to the firm. Mr. Wright was admitted to practice in the State of Maryland in 1981 and as a Virginia Corporate Counsel in the Commonwealth of Virginia in 2013. He is a member of the Bars of various courts, including the United States District Court for the District of Maryland, the United States Court of Appeals for the Fourth Circuit, and the Supreme Court of the United States, among others, and the Maryland State Bar Association, the Virginia State Bar, the American Bar Association, and the Federal Bar Association. Prior to joining Miles & Stockbridge in 1981, Mr. Wright clerked for J. Dudley Digges, Associate Judge on the Court of Appeals of Maryland, that State’s highest court. Mr. Wright was educated at Georgetown University Law Center in Washington, D.C. (J.D., 1980, with Honors), Tufts University in Medford, Massachusetts (B.A., 1977, Magna Cum Laude), and Landon School in Bethesda, Maryland.

Emmett J. Wood - Mr. Wood joined the Company in 1996 and worked in various roles at the Company in both a marketing and business development capacity. He worked on the federal sales team, commercial and partner/channel groups and served as director of commercial and channel sales. In January 2010, Mr. Wood was promoted to Vice President, Marketing and then to his current position in April 2013. He is responsible for brand management, marketing communications, sponsorships and events, media and analyst relations, government relations, employee communications and corporate community relations. In addition to his duties related to marketing, Mr. Wood works with senior management in developing the overall corporate strategy and planning. Previously, he also worked in the sales and marketing groups at Dow Jones, Inc. and The Wall Street Journal. Mr. Wood is a graduate of Georgetown University, with a Bachelor of Arts in political science. Mr. Wood is the brother of Mr. John B. Wood, the President, Chief Executive Officer and Chairman of the Board of the Company.

Brendan D. Malloy - Mr. Malloy joined the Company in 1996, serving initially as a senior account executive before being promoted to director of Department of Defense (“DoD”) Sales, and later to Vice President of DoD Sales. In January 2005, he was appointed Senior Vice President of Sales. He currently leads the Information Assurance/Xacta organization, in support of opportunities in the DoD, federal agencies, and the intelligence community. Mr. Malloy is a member of the Armed Forces Communications and Electronics Association (AFCEA) and the Association of the United States Army (AUSA). He previously held sales positions with QMS Federal and Printer Plus. Mr. Malloy is a 1988 graduate of Curry College.

Richard P. Tracy - Mr. Tracy joined the Company in October 1986 and held a number of management positions. In February 1996, he was promoted to Vice President of the Telos information security group and in this capacity established a formidable information security consulting practice. In February 2000, Mr. Tracy was promoted to Senior Vice President for operations and helped launch the Xacta network business lines, the Company’s segment focusing on information security. Since that time, Mr. Tracy has pioneered the development of innovative and highly scalable enterprise risk management technologies that have become industry-leading solutions within the federal government and the financial services verticals. He is the principal inventor listed on five patents for the Xacta software. Mr. Tracy also served as Chief Technology Officer from 2005 to 2014.

Kenneth F. Fagan, Jr. - Mr. Fagan leads the Secure Communications division, which supports military messaging programs with the Defense Information Systems Agency (DISA), Joint Staff, Combatant Commands, Military Services, Homeland Defense, Intelligence Community (IC), and other Department of Defense (DoD) and IC clients. Previously, he held the position of Senior Program Manager and Program Manager, with on-site responsibility for the Army Information Technology Agency’s organizational messaging service and application management contract at the Pentagon Telecommunication Center. Mr. Fagan’s experience ranges from materiel management and operations research to information technology acquisition and program management. He is intimately familiar with DoD and IC acquisition program policies and procedures and holds an Acquisition Level III Certification in Program Management from Defense Acquisition University. Before joining Telos in February 2012, Mr. Fagan spent almost 35 years serving in increasingly responsible management positions within the DoD, including DISA, Office of the Assistant Secretary of Defense (Production and Logistics), United States Army Communications and Electronics Command, and Tobyhanna Army Depot. Mr. Fagan earned a Bachelor’s Degree in Business Administration from Lemoyne College (1975) and a Master of Business Administration in Management (1982) from Fairleigh Dickinson University. He is a graduate of the Leadership for a Democratic Society course at the Federal Executive Institute and a Federal Computer Week Federal 100 Award Winner.

Rinaldi Pisani - Mr. Pisani leads the Company’s corporate sales team and is responsible for selling Telos-branded solutions, such as Xacta, and services into federal, commercial and global markets. He is also responsible for supporting strategic partnerships and alliances. From December 2013 to December 2014, Mr. Pisani held the position of Senior Vice President, Strategic Business Development, where he was responsible for overseeing Telos’ corporate level business development and capture activities as well as the integration of new partners and technologies. Mr. Pisani joined Telos in 2000 and served as senior Army account manager and team lead and director of Army and DoD sales. He was later appointed vice president of business development for information assurance solutions and in 2010 became vice president and general manager of the information assurance solution area. Mr. Pisani was then vice president of cyber application solutions, providing oversight and management for a broad range of cybersecurity solutions, including the Xacta IA Manager and SE7EN systems, for customers in the DoD, federal agencies, and the intelligence community. Before joining Telos, Mr. Pisani held several positions with Westwood Computer, leaving as national government sales manager. Mr. Pisani is a graduate of the Georgetown University School of Foreign Service, with a Bachelor of Science in International Economics.

David S. Easley - Mr. Easley joined the Company in April 2005 as Director of Finance & Accounting. In October 2005, Mr. Easley was promoted to Controller. Mr. Easley also serves as President and Treasurer of Teloworks, Inc. at the request of the Company. Prior to joining the Company, Mr. Easley held various positions, including Controller, for Applied Predictive Technologies, Inc., a software and consulting company (since acquired by MasterCard), and Senior Accountant with Beers & Cutler PLLC (now part of Baker Tilly Virchow Krause LLP) in Washington, D.C. Mr. Easley is a Certified Public Accountant and holds a Bachelor of Science in Accounting from the University of Kentucky.

Mark Griffin - Mr. Griffin joined the Company in 1984 as program manager. He was promoted to vice president for the Company’s traditional business division in January 2004 and to Vice President, Identity Management, effective January 2007. In April 2007, he was appointed to head the newly formed Telos ID. In November 2017, Mr. Griffin joined the board of the Federation for Identity and Cross-Credentialing Systems (“FiXs”) in Fairfax, Virginia, a coalition of commercial companies, government contractors, and not-for-profit entities that have established and maintained a worldwide, interoperable identity and cross-credentialing network built on security, trust, privacy, standard operating rules, policies and technical standards. Mr. Griffin has over 30 years’ experience in government IT contracting, materials management and systems integration projects in the electronics and communications fields. He has been involved in day-to-day operations of and has had overall management

responsibility for many of Telos’ most critical programs for the Army, Navy, Federal Aviation Administration, Transportation Security Administration, DMDC, General Services Administration, Centers for Medicare and Medicaid, the U.S. Census Bureau and Immigration and Naturalization Services. Mr. Griffin holds a Bachelor of Science in Engineering from Virginia Polytechnic Institute and State University.

Bernard C. Bailey - President, Paraquis Solutions, LLC, a strategy and corporate governance consulting firm. Since 2012, Dr. Bailey has served as Chairman of the Board of Authentix, Inc., a private authentication company. From October 2012 to May 2018, he also served as President and CEO of Authentix. From September 2018 to December 2019, Dr. Bailey served as President, Committee for Economic Development (CED) of The Conference Board.

Dr. Bailey’s career spans over three decades of management experience in the high technology and security industries. Prior to Authentix Dr. Bailey ran his own consulting company, Paraquis Solutions, LLC. From August 2002 to September 2006 he served as President and CEO of Viisage Technology, Inc. (NASDAQ:VISG), a leading provider of advanced technology identity solutions. Under his four years of leadership, Viisage’s market capitalization grew from $60 million to over $1 billion. During that period, the company executed nine acquisitions, eventually culminating in the formation of L1 Identity Solutions, a NYSE listed company (NYSE:ID). Prior to Viisage, from January 2001 to August 2002, Dr. Bailey served in various executive roles, including COO at Art Technology Group, a leading provider of e-commerce software. From 1984 to 2001, Dr. Bailey held a variety of finance, sales, marketing, and operations positions at IBM, where he also served in executive roles involved in the growth and development of IBM Global Services’ systems integration and consulting business lines. Dr. Bailey has been a member of the Company’s Board of Directors since October 2006. Dr. Bailey also serves on the board of Telos ID at the request of Telos. In addition to these responsibilities, Dr. Bailey serves as an Advisory Board Member for Egis Capital Partners, a private equity investment fund focused on the security industry; as a director for Mission Critical Partners (MCP), a private company providing solutions across the entire emergency communications ecosystem; on the Board of Advisors for the U.S. Naval Academy Athletic and Scholarship Foundation; as Chairman of the Board of Trustees for Trout Unlimited; and is an adjunct faculty member in the Weatherhead School of Management at Case Western Reserve University.

Dr. Bailey has significant experience in finance matters and within the Company’s industry. He has served as a financial expert witness in Delaware’s Court of Chancery and holds a PhD in Management, having completed his dissertation on corporate governance. He has written and spoken extensively on corporate governance issues. He has also served on a number of boards of public companies. Dr. Bailey’s executive and board experience make him a valuable resource for the Board and the Company.

David Borland - President, Borland Group, an information technology consulting company, since January 2004. Mr. Borland was elected to the Board of Directors in March 2004 after retiring as Deputy Chief Information Officer (“CIO”) of the U.S. Army with more than 30 years of experience in the U.S. government. Mr. Borland’s U.S. Army career experience also includes serving as Vice Director of Information Systems for Command, Control, Communications, and Computers; Director of the Information Systems Selection and Acquisition Agency; and numerous other positions. From 1966 through 1970, Mr. Borland served in the U.S. Air Force. Mr. Borland received numerous awards, including the Meritorious Presidential Rank Award for Senior Executive Service Members (1996 and 2003), the Distinguished Presidential Rank Award (2000), and the U.S. Army Decoration for Exceptional Civilian Service (1998 and 2003). Mr. Borland holds a Master’s Degree in Finance from George Washington University.

Mr. Borland’s industry experience and extensive service with the U.S. Army and the U.S. Air Force make him a valuable member of the Board of Directors.

Bonnie Carroll – President and Founder, Tragedy Assistance Program for Survivors (TAPS), a non-profit organization that provides comfort, case, and resources to family members grieving the death of a member of the military, since 1994. Ms. Carroll was elected to our Board of Directors on September 21, 2020. Ms. Carroll also has held appointments in the government, including White House Liaison at the Department of Veterans Affairs (VA) under President George W. Bush, Executive Assistant to the President for Cabinet Affairs under President Reagan, and the Senior Advisor to the Iraqi Ministry of Communications during Operation Iraqi Freedom.

Ms. Carroll retired as a Major in the Air Force Reserve following 31 years of service, where her career included serving as Chief, Casualty Operations, HQ USAF. Prior to joining the USAFR, Maj. Carroll served 16 years as both a noncommissioned officer and then a commissioned officer in the Air National Guard as a Transportation Officer, Logistics Officer, and Executive Officer.

Ms. Carroll holds a degree in Public Administration and Political Science from American University and has completed Harvard University John F. Kennedy School of Government’s Executive Leadership Program on International Conflict Resolution. She is a graduate of several military service schools, including the USAF Logistics Officer Course, Squadron Officers School, Defense Equal Opportunity Management Institute, Academy of Military Science and USAF Basic Training (Honor Graduate). Ms. Carroll received the Presidential Medal of Freedom from President Barack Obama and the Zachary and Elizabeth Fisher Distinguished Civilian Humanitarian Award from the DoD.

Ms. Carroll’s extensive experience and relationships with the military and her philanthropic endeavors make her a valuable member of the Board of Directors.

Fredrick D. Schaufeld – Co-Founder and Managing Director of SWaN & Legend Venture Partners (SWaN) since 2006. Mr. Schaufeld was elected to the Board of Directors on November 8, 2020. Mr. Schaufeld is a Partner in Monumental Sports and Entertainment, which owns the Washington Capitals (NHL), Wizards (NBA), Mystics (WNBA), Capital City Go-Go (NBA-G) and the Capital One Arena. He is a Partner in the Washington Nationals (MLB), Team Liquid (e-Sports), the Professional Fighters League (PFL) and the Hill Top House Hotel, Harpers Ferry. Prior to SWaN, Mr. Schaufeld founded and led NEW Corp. (NEW), which was acquired by Asurion in 2008 (now NEW Asurion). Mr. Schaufeld currently sits on the boards of several private companies. Mr. Schaufeld received his BA in Government from Lehigh University.

Mr. Schaufeld’s experience as a founder and chief executive officer of a fast growing company make him a valuable member of the Board of Directors.

Major General John W. Maluda (USAF, Ret.) - Retired, U.S. Air Force Major General. General Maluda was elected to the Board in October 2009. He retired from the U.S. Air Force in September 2009 after more than 34 years of continuous active duty. At the time of his retirement, General Maluda was Director of Cyberspace Transformation and Strategy, in the Office of the Secretary of the Air Force, and Chief Information Officer. In that capacity, he shaped doctrine, strategy, and policy for communications and information activities and served as the functional advocate for 30,000 personnel. Prior to that, General Maluda was Vice Commander, 8th Air Force, Barksdale Air Force Base, Louisiana. General Maluda enlisted in the Air Force in 1973 and received his commission in 1978 as a distinguished graduate of the ROTC program at Troy State University in Alabama. His career highlights include serving at three major commands, with unified combatant commands, a defense agency, the White House and the Air Staff. General Maluda’s staff experience included positions at Headquarters U.S. Air Force, Air Combat Command, U.S. Air Force in Europe, Air Force Special Operations Command, U.S. Space Command and the White House Communications Agency. General Maluda holds a Bachelor of Science in Electrical Engineering from Auburn University, a Master’s Degree in Systems Management from the University of Southern California, and Master’s Director Certification from the American College of Corporate Directors, a public company director education and credentialing organization.

General Maluda’s comprehensive experience with the U.S. Air Force and broad industry insight make him a valuable member of the Board of Directors.

Robert J. Marino - Retired, Executive Vice President, Special Projects for the Company until February 2013. Mr. Marino joined the Company in 1988 as Senior Vice President of Sales and Marketing. In 1990, his responsibilities were expanded to include Program Management in addition to Sales and Marketing. In January 1994, Mr. Marino was appointed President of Telos Systems Integration, and in January 1998, he was appointed Chief Sales and Marketing Officer of the Company, a position he held until June 2004 at which time he was appointed Executive Vice President for Special Projects. Prior to joining the Company in February 1988, Mr. Marino held the position of Senior Vice President of Sales and Marketing with Centel Federal Systems and M/A.com Information Systems, both of which are U.S. government contractors. Mr. Marino was elected to the Board of Directors in June 2004.

Mr. Marino served the Company for 25 years and remains a valuable advisor to the Company’s various business lines. His extensive experience with the Company, and its employees, vendors and customers, makes him a valuable member of the Board of Directors. Mr. Marino has informed the Company that he will resign from his position on the Board of Directors effective upon the completion of the offering described in this prospectus.

At any time that dividends on the Exchangeable Redeemable Preferred Stock are in arrears and unpaid for three consecutive full semi-annual periods, the holders of the Exchangeable Redeemable Preferred Stock are entitled to elect two members to the Company’s Board of Directors. Accordingly, on June 18, 2007, the holders of the Exchangeable Redeemable Preferred Stock elected Seth W. Hamot and Andrew R. Siegel to the Company’s Board of Directors. On March 9, 2018, Mr. Hamot notified the Company of his resignation from the Board, effective immediately. In accordance with the Company’s charter, Mr. Siegel appointed Mr. William H. Alderman on March 21, 2018 to fill the vacancy created by Mr. Hamot’s resignation. Subject to the following sentence, each of the terms of Messrs. Siegel and Alderman, as Class D Directors, will continue until his respective successor is elected and qualified. Upon the completion of the offering described in this prospectus and the conversion of the Exchangeable Redeemable Preferred Stock into shares of common stock and the right to receive cash, William H. Alderman and Andrew R. Siegel will be automatically removed from the Board of Directors and from their positions as Class D Directors and the two Class D Director positions on the Board of Directors will be automatically eliminated.

William H. Alderman - Founder and President, Alderman & Company®, founded in 2001, and its affiliate, Alderman & Company Capital, LLC, founded in 2005, a registered broker-dealer providing management consulting and investment banking services, specializing in sell-side M&A services, to the aerospace and defense industry. Mr. Alderman has been a director of the Company since March 21, 2018. Prior to holding his current position, Mr. Alderman held a number of senior positions in corporate development, finance, and banking, such as General Electric Company (NYSE: GE), Aviation Sales Company (NYSE: AVS), and Fieldstone Private Capital Group. Mr. Alderman has also served on several corporate boards of publicly-held and private companies: DLH Holdings Corp. (NASDAQ: DLHC), a services supplier to the U.S. Department of Defense and the U.S. Department of Veterans Affairs, from 2007 to 2019; and of Breeze-Eastern Corporation (AMEX: BZC), a helicopter winch and aircraft linear actuation systems supplier, from 2007 to 2012. In the past, Mr. Alderman also served on the corporate boards of the following privately-held entities: HM Bullard Company, a retail business; UFC Aerospace Corp., a provider of aerospace logistics/integrated supply chain solutions; and Cox & Co., an ESOP-owned provider of ice protection and temperature control systems to the aerospace industry. He also held a number of non-profit board positions. Mr. Alderman earned an MBA from the J.L. Kellogg Graduate School of Management (1989) and a Bachelor of Arts degree from Kenyon College (1984). He also holds numerous securities industry licenses, including series 7, 24, 63 and 65.

Mr. Alderman was appointed to the Board pursuant to the Company’s governing documents by Mr. Siegel to fill the vacancy created by Mr. Hamot’s resignation and his appointment is not subject to any recommendations for election by the Board. Mr. Siegel has not advised the Company of the specific experience, qualifications, attributes or skills that led to the conclusion that Mr. Alderman should serve as a director.

Mr. Alderman is paid through a compensation arrangement with Wynnefield Partners Small Cap Value, L.P. (“Wynnefield”), one of the holders of the Exchangeable Redeemable Preferred Stock. For each full 30-day period of service as a Board member, Mr. Alderman shall receive $5,000.00. In addition, Wynnefield will reimburse Mr. Alderman for all necessary and reasonable travel and related expenses incurred in connection with Board meeting attendance or other required Board activities.

Andrew R. Siegel - Managing Member, White Bay Capital Management, LLC. Mr. Siegel has been a director of the Company since June 18, 2007. Mr. Siegel was nominated by Costa Brava, a holder of the Exchangeable Redeemable Preferred Stock. Mr. Siegel was a Senior Vice President of RRHCM from 2005 to December 2008. Prior to joining RRHCM, from July 2003 to February 2004, Mr. Siegel was a member of DebtTraders Ltd. Previously, Mr. Siegel served on the Board of TechTeam Global, Inc. Mr. Siegel received a Bachelor’s Degree from American University and a Master’s Degree in Business Administration from the University of Maryland.

Mr. Siegel was elected pursuant to the Company’s governing documents by the holders of the Exchangeable Redeemable Preferred Stock and his election is not subject to any recommendations for election by the Board. The holders of the Exchangeable Redeemable Preferred Stock have not advised the Company of the specific experience, qualifications, attributes or skills that led to the conclusion that Mr. Siegel should serve as a director.

Each of our officers and directors is a United States citizen.

On May 13, 2020, we formed the Advisory Board of Telos (the “Advisory Board”), which serves as advisors to the Company’s management team and the Board of Directors in the conduct of the Company’s business and the pursuit of its strategic objectives. Membership of the Advisory Board is determined by the Board of Directors, and once appointed to the Advisory Board, members of the Advisory Board serve until the earlier of their resignation, removal, or the appointment of their replacement.

The Board of Directors has delegated to the Management Development and Compensation Committee (“Compensation Committee”) the responsibility to evaluate potential candidates for the Advisory Board. The Compensation Committee has also been delegated the responsibility of reviewing the terms upon which such candidates would serve and be compensated for their service, and recommend both appropriate candidates and terms for approval by the Board of Directors.

Responsibilities of members of the Advisory Board include:

The Advisory Board meets periodically pursuant to the needs or opportunities of the business of the Company. The chairperson of the Board of Advisors is responsible for calling and convening such meetings. All members of the Advisory Board serve as independent contractors engaged solely to consult with the Company’s management team, with no duties with respect to the management of the company or authority to bind the Company or act on its behalf. All members of the Advisory Board enter into an agreement with the Company to govern the relationship between the Company and such member. We expect to appoint additional Advisory Board members over the next year.

On May 13, 2020, the Company appointed General (Ret.) Keith Alexander to the Advisory Board as its inaugural member. General Alexander will serve as a strategic partner and provide the Company with advice on key cybersecurity objectives and initiatives. General Alexander is the Founder and Co-CEO of IronNet Cybersecurity, a global cybersecurity leader that is revolutionizing how organizations secure their networks by delivering the first-ever Collective Defense platform allowing real-time threat intelligence sharing. General Alexander previously served as director of the National Security Agency, chief of the Central Security Service and commander of the United States Cyber Command, where he led DoD agencies during the conflicts in Afghanistan and Iraq at a time when cyber-attacks against the United States were on the rise. General Alexander was recently appointed to serve on the board of directors of Amazon.com, Inc.

As discussed in our proxy statement for the annual meeting held on May 13, 2020, the Compensation Committee is primarily responsible for the development, execution and adherence to our compensation philosophy. In anticipation of the offering described in this prospectus, on November 5, 2020, the Compensation Committee implemented a new compensation plan for the senior executive officers, which was reviewed and approved by the Board of Directors on November 8, 2020. The senior executive team consists of the eleven (11) officers (“senior officers”), including our five named executive officers. This compensation program is designed to fully

align with and support the achievement of our business and financial goals, to be competitive in the intense market for talent in which we compete, and to conform our compensation plan generally to plans typically utilized by companies in our peer group and industry.

We are a high-performance, results driven organization made up of talented people. In general, our compensation system is designed to engage, motivate and challenge our employees to continuously develop to meet their full potential, to align their individual efforts to our business and strategic objectives, and to reward our employees for contributions to the achievement of those objectives. More specifically, the primary objectives of the compensation program are:

The individual components of the compensation program — consisting of base salary, annual incentive cash compensation or bonus (which we now call the Annual Incentive Program (or “AIP”)), equity incentive compensation (called the Long Term Incentive Program or “LTIP”), and perquisites — are designed to meet these objectives and together are intended to be competitive in the marketplace. The overall compensation package is based on the following considerations:

The Compensation Committee has engaged Lockton Companies, LLC (“Lockton”) as an independent executive compensation advisor. Lockton advises the Compensation Committee on matters relating to benchmarking compensation and designing appropriate compensation programs. As part of its consultation with the Compensation Committee, Lockton provides the Compensation Committee with peer group comparisons. The Compensation Committee has direct access to Lockton and control over its engagement, although our executive management may interact with Lockton for the purpose of facilitating the flow of information between the Compensation Committee and Lockton and assisting the Compensation Committee in its work. The Compensation Committee has determined that the work of Lockton and its employees as compensation consultants to the Compensation Committee has not created any conflict of interest.

In the fall of 2020, Lockton conducted an assessment of our named executive officer compensation packages and the compensation paid to certain other senior officers to determine how the total compensation compared to those of our peers and a market median. The market median was comprised of a combination of market compensation data from peer company proxy statements as well as published industry sources utilizing companies that operate in the software and services sector (the “external market”). The following companies, selected because of the

nature of their business and their level of revenues (which generally were under $1 billion), were included in the peer group: Fireye, Okta, Inc., Ping Identity, Proofpoint, Qualys, Zix, Zscaler. The analysis prepared by Lockton analyzed compensation paid to our named executive officers and other senior officers in 2020, and Lockton provided substantive input to the Compensation Committee with respect to salaries, the AIP and the LTIP. While the data and input provided by Lockton is a factor in its analysis of various compensation elements and has been relied upon by the Compensation Committee, the Compensation Committee makes the final determination on all compensation decisions.

We provide each of our executive officers and other employees with a base salary to compensate them for services rendered during the fiscal year. The relative levels of base salary for executive officers are designed to reflect each executive officer’s professional expertise and scope of responsibility and accountability within the Company, our financial performance, and the executive officer’s individual performance. Base salaries generally are established at levels sufficient to attract and retain an effective management team when considered in connection with the performance-based components of our overall compensation program. In 2020, the Compensation Committee made adjustments in the base salary of the named executive officers for the first time in approximately seven years. No adjustments to the salaries of the named executive officers are currently contemplated to be made during 2021. The current annual base salaries of the named executive officers are reflected below:

Annual Incentive Program The senior officers, including the named executive officers, are eligible for incentive cash bonus awards under our AIP. The purpose of the AIP is to provide each of our senior executive officers the opportunity annually to earn a cash bonus as an incentive to put forth maximum efforts for both our short-term and long-term success and to drive achievement of our long-term growth and profitability objectives. The AIP is based upon one or more financial performance targets as determined by the Compensation Committee on an annual basis. Awards under the AIP are an integral component of compensation that link and reinforce executive decision-making and performance with the annual objectives of the Company. The AIP is administered by the Compensation Committee, and determinations by the Compensation Committee are final, conclusive and binding on all parties. The Compensation Committee has the discretion to determine the appropriate performance targets, the amount of the awards, and the leverage features described below. The amount of the awards, performance targets, and leverage features generally are established in writing prior to or during the first quarter of each year.

On November 5, 2020, the Compensation Committee approved, and, on November 8, 2020, the Board reviewed and approved, the AIP applicable for 2021. The Compensation Committee selected an aggressive earnings target based on the Company achieving Adjusted EBITDA of $33.9 million during 2021. We define Adjusted EBITDA as net income (loss), adjusted for interest expense, loss on extinguishment of debt, (benefit) provision for income taxes, depreciation and amortization, stock-based compensation expense, acquisition-related expense, and other (income) expense, net. For purposes of the AIP, the Compensation Committee has the authority to exclude non-recurring, irregular and one-time items when determining Adjusted EBITDA.

The amounts of the potential AIP awards to the senior executives range from 40% to a maximum of 100% of the annual salaries of the various senior executives (with the CEO set at 100% of his annual salary and all other senior officers set at lower percentages of each of their salaries), subject to leveraging in accordance with an AIP Award Leverage Schedule. The amount of leverage ranges from a low of 0% (in the event performance falls below 100% of the performance target), in which case no AIP award would be earned, to a high of 200% (in the event performance is achieved equal to or higher than 120% of the performance target), with the performance at target set to a leverage amount of 100% of the senior officer’s potential AIP award. The performance targets are subject to equitable adjustment, in the discretion of the Compensation Committee, in the event of significant transactions such as corporate acquisitions or dispositions.

The AIP and the annual cash incentives potentially payable under it for our senior officers are generally competitive with similar annual incentive compensation earned by senior executives at our peer companies, as evaluated by Lockton and reported to the Compensation Committee.

The Board adopted the Telos Corporation 2016 Omnibus Long-Term Incentive Plan (“2016 Plan”) on August 12, 2016. The 2016 Plan was amended in 2020, and such amendments were approved by the Board on September 11, 2020 and submitted to and approved by the common stockholders at a meeting held on October 26, 2020. The amendments to the 2016 Plan reserved an additional 8,392,258 shares of common stock under the 2016 Plan (prior to the contemplated reverse stock split) and established a new 10-year term for the 2016 Plan effective October 26, 2020.

The purpose of the 2016 Plan is to enhance our ability to attract, motivate and retain highly qualified employees, to improve our business results and earnings by providing such persons an opportunity to acquire or increase a direct proprietary interest through ownership of equity in the operations and future success of the Company, and to align the employees’ interests and efforts with the interests of our stockholders. The 2016 Plan allows for the award of a number of types of equity or equity-based incentives, including stock options, restricted stock, and restricted share units, among others, and the incentives can be structured to be either time-based or performance-based. The Compensation Committee decides what form of incentive to use on a grant-by-grant basis, depending on the circumstances. When approving an incentive for a senior officer, the Compensation Committee considers the senior officer’s current role and contribution to the Company, the anticipated role and contribution of the senior officer to the Company’s long-term financial and performance goals, the senior officer’s performance and achievements, and the industry practices and norms as evidenced by our peer group of companies. The Compensation Committee also takes into account the amount of long-term incentives granted in prior years, existing levels of stock ownership by senior officers, and the aggregate grants of incentives to all senior officers. The Compensation Committee also considers the other elements of incentive compensation available to senior officers and the performance metrics associated with those incentives, with a view toward providing an appropriately diverse set of performance criteria and objectives to incent both service to the Company over time and performance and to avoid or minimize multiple forms of compensation for the same achievement. In general, the senior officers with higher levels and amounts of responsibility are eligible to receive larger equity awards. Finally, the Compensation Committee reviews proposed equity awards to senior officers against benchmarking and peer group data and utilizes that data to ensure that the level of equity awards to our senior officers generally are competitive and in alignment with our peer group companies and industry expectations.

For 2021, the Compensation Committee determined, at a meeting held on November 5, 2020, and our Board reviewed at meeting on November 8, 2020, that our senior executives will be eligible to receive long-term incentives split equally between two components: restricted stock awards with time-based vesting (“RSAs”) and restricted share units with performance-based vesting (“PSUs”). Time-based incentives encourage retention and provide for incremental recognition of equity compensation over the vesting period. Performance-based incentives allow for additional awards based on over-achievement, while also withholding compensation for under-performance, of defined objective performance criteria. The time-based RSAs, assuming the continued service of the senior officer, would vest in three annual installments from the date of the award, with 30% vesting on each of the first and second anniversaries and 40% vesting on the third anniversary of the effective date of the grant of the awards. The PSUs, if the performance criteria are satisfied while the senior officer continues in service, would settle in our common stock of the Company. For 2021, the Compensation Committee established a single, aggressive performance criterion equal to appreciation in the per share price of our common stock in an amount equal to 2.5 times the price set in the initial public offering described in this prospectus, measured at any time during the period from the date of the initial public offering through the end of calendar year 2023. To meet the performance criterion, our common stock must trade (a) at or above that appreciated price for 20 of 30 consecutive trading days or (ii) the weighted average of the price over any 30 day trading period must equal that appreciated price. This performance criterion was selected because it represents an expression by the investing public indicative of our financial performance. The Compensation Committee believes that this performance factor drives the senior officers toward the goals of sustainable quality growth, as measured by the market’s perception of our performance.

The target amounts of the potential awards of PSUs to the senior executives range from 125% to a maximum of 700% of the annual salaries of the various senior executives (with the CEO set at 700% of his annual salary and all other senior officers set at percentages ranging from 125% to 400% each of their salaries). There is no leveraging of the awards in the event of achievement or over-achievement of the target, although upon achievement of the indicated appreciated share price and vesting of the PSUs, the Compensation Committee will grant additional replacement equity awards to our executives in an amount to be equitably determined, outside of the normal annual equity award grant cycle. The Compensation Committee expects to award these RSAs or PSUs during the fourth quarter of 2020 or the first quarter of 2021.

Generally, at the start of the three-year performance cycle, the Compensation Committee sets the percentage of annual salary for each senior executive, the performance criteria as well as the threshold, target and maximum performance levels and corresponding payouts. When establishing these various figures, the Compensation Committee considers, among other things, the position and responsibilities of the senior officers, projected performance of our long-term strategic growth objectives, business outlook, and market growth forecasts. As the goals are established for future performance, outcomes are by definition uncertain. As indicated, for 2021, the vesting criteria for 50% of the long-term incentive for all of our senior executives is performance-based, and the vesting criteria for remaining 50% of such incentives is time-based.

All of our named executive officers will receive the majority of their compensation from long-term awards, assuming such awards are earned. The highest level of concentration of long-term compensation is set for the CEO and the COO, based on the CEO’s role as the steward of our long-term success and the COO’s responsibility to deliver on our business strategies and meet the targeted financial goals.

Subject to approval by the Compensation Committee (and, in the case of members of our Board of Directors, the Company’s Audit Committee), we expect to issue equity awards for up to 2.4 million shares of our common stock to employees, which could include senior officers and named executive officers, and members of our board of directors under the 2016 Plan during the fourth quarter of 2020 or the first quarter of 2021. These awards are in addition to the RSAs and PSUs described above for 2021 and would have time-based vesting criteria.

We provide certain perquisites to our senior officers in order to allow the senior officers to work more efficiently and to help us remain competitive by retaining talented and dedicated executives. These perquisites are limited to reimbursement for golf club membership, home office expenses, and, in certain circumstances, commuting costs. The Compensation Committee believes that the perquisites are consistent with our overall compensation program, although Lockton has advised us that our perquisites in certain respects are below market. No changes to our perquisites are currently contemplated by the Compensation Committee or the senior executive team.

The Exchangeable Redeemable Preferred Stock is quoted as “TLSRP” on the OTCQB marketplace and the OTC Bulletin Board. There currently is limited liquidity in the trading of the Exchangeable Redeemable Preferred Stock, which trades at a substantial discount to its redemption and liquidation value.

Upon the consummation of the offering described in this prospectus, which will constitute a qualified initial public offering for the purposes of the terms of the Exchangeable Redeemable Preferred Stock, each issued and outstanding share of Exchangeable Redeemable Preferred Stock will automatically be converted in an “ERPS Conversion” into the right to receive (i) an amount of cash equal to (I) the ERPS Liquidation Value; multiplied by (II) 0.90; multiplied by (III) 0.85 and (ii) that number of shares of common stock (valued at the initial offering price to the public) equal to (I) the ERPS Liquidation Value; multiplied by (II) 0.90; multiplied by (III) 0.15. No fractional shares of common stock, however, will be issued upon an ERPS Conversion Event but, in lieu thereof, the holder shall be entitled to receive an amount of cash equal to the fair market value of a share of common stock (valued at the initial offering price to the public) at the time of such ERPS Conversion Event multiplied by such fractional amount (rounded to the nearest cent). “ERPS Liquidation Value” means, per each share of Exchangeable Redeemable Preferred Stock, $10 together with all accrued and unpaid dividends (whether or not earned or declared) thereon calculated as of the actual date of an ERPS Conversion Event without interest, which, for the avoidance of doubt, was approximately $142.1 million as of September 30, 2020.

All shares of common stock issued upon an ERPS Conversion shall be validly issued, fully paid and non-assessable. We have applied to issue the shares of common stock issued upon conversion of the

Exchangeable Redeemable Preferred Stock on the Nasdaq Global Market. Upon an ERPS Conversion Event, holders of Exchangeable Redeemable Preferred Stock will receive that number of shares of our common stock described above with terms applicable to all other shares of common stock described in “Description of Our Capital Stock.”

On the closing date of the offering described in this prospectus, the aggregate cash portion of the payment due to holders of Exchangeable Redeemable Preferred Stock upon an ERPS Conversion Event as calculated and set forth above shall be deposited with a third-party exchange agent selected by us (the “Exchange Agent”). As soon as practicable after the closing of the offering, but in no event later than 10 days thereafter, the Exchange Agent will provide to each holder of Exchangeable Redeemable Preferred Stock a letter of transmittal and instructions advising such holder of the effectiveness of the offering and the procedure for surrendering to the Exchange Agent certificates or book-entry shares of Exchangeable Redeemable Preferred Stock in exchange for the consideration allotted to them in the ERPS Conversion.

Holders of Exchange Redeemable Preferred Stock who surrender their Exchangeable Redeemable Preferred Stock in accordance with the instructions that will be set forth in the letter of transmittal, will, upon the Exchange Agent's acceptance of such certificates or book-entry shares and transmittal materials or evidence, be entitled to receive (i) a certificate (or evidence of shares in book-entry form, as applicable) representing the number of shares of our common stock that such holder is entitled to receive pursuant to the ERPS Conversion, and (ii) a check or wire transfer in the amount (after giving effect of any tax withholding as described below) equal to the amount of any cash that such holder is entitled to receive pursuant to the ERPS Conversion, including any cash payment in lieu of fractional shares of our common stock. No interest will accrue or be paid with respect to any cash paid in lieu of fractional shares of our common stock.

We own 50% of Telos ID, are entitled to receive 50% of the profits of Telos ID, and may appoint three (3) members of the Telos ID Board. Hoya ID Fund A, LLC (“Hoya”) owns 50% of Telos ID, is entitled to receive 50% of the profits of Telos ID, and may appoint two (2) members of the Telos ID Board.

For more than 25 years, Telos ID’s identity trust services have provided access to health care, commissary services, and critical defense resources for more than two million military members, their dependents, and civilian employees through the use of the CAC. In addition, Telos ID, as one of only two authorized aviation channeling providers in the market, offers its aviation partners innovative biometric, identity trust, and customer service technologies that are critical to the operation of more than half of the largest airports in the nation. For the 2020 U.S. Census, Telos ID is extending digital identity verification, fingerprinting, and photo services across the nation in support of the 2020 Census hiring initiatives.

Telos ID was recently awarded a 10-year contract to provide enrollment services in support of the TSA PreCheck™ Enrollment Program. This high-profile opportunity will use Telos ID’s service to engage with the world’s leading airline, hospitality, credit card, ride share, and other Fortune 500 businesses to provide consumer marketing and loyalty program tie-ins to promote the PreCheck™ program.

Telos ID also was recently awarded a 10-year contract by The Centers for Medicare & Medicaid Services to provide technology and service solutions that detect, prevent, and proactively deter fraud, waste and abuse in the Medicare and Medicaid programs. Telos ID’s digital identity trust platform and digital services is expected to offer critical technology necessary to identify and mitigate fraud across the United States. Each year, approximately 1,500,000 health care providers are required to undergo FBI-based non-criminal history checks requiring identity trust services, including identity verification, fingerprinting, and continuous monitoring.

On October 5, 2020, we entered into a Membership Interest Purchase Agreement between the Company and Hoya to purchase all of the Class B Units of Telos ID (“Telos ID Units”) owned by Hoya (the “Telos ID Purchase”). Upon the closing of the Telos ID Purchase, Telos ID will become our wholly owned subsidiary. The successful consummation of the offering described in this prospectus is a condition to the closing of the Telos ID Purchase. If the offering described in this prospectus is not consummated, the Telos ID Purchase will not occur. We have agreed with Hoya that the number of shares received in the transaction will be 7,278,030.

As consideration for the Telos ID Units, we will pay a purchase price to Hoya or its members consisting of (a) the payment to Hoya of $30.0 million in cash and (b) the issuance to Hoya or its members of 7,278,030 shares of our common stock.

The following table sets forth the beneficial ownership of our common stock immediately prior to and immediately after the completion of this offering by:

To our knowledge, each person named in the table has sole voting and investment power with respect to all of the securities shown as beneficially owned by such person, except as otherwise set forth in the notes to the table. The number of securities shown represents the number of securities the person “beneficially owns,” as determined by the rules of the SEC. The SEC has defined “beneficial” ownership of a security to mean the possession, directly or indirectly, of voting power and/or investment power. A security holder is also deemed to be, as of any date, the beneficial owner of all securities that such security holder has the right to acquire within 60 days after such date through (i) the exercise of any option, warrant or right, (ii) the conversion of a security, (iii) the power to revoke a trust, discretionary account or similar arrangement or (iv) the automatic termination of a trust, discretionary account or similar arrangement.

The percentages reflect beneficial ownership immediately prior to and immediately after the completion of this offering and are based on 39.9 million shares of our common stock outstanding as of November 10, 2020 and 62.4 million shares of our common stock outstanding after the completion of this offering (which includes 1.1 million shares of common stock issuable upon the ERPS Conversion as a result of this offering and includes 7.3 million shares of common stock to be issued to Hoya or its members as a result of the purchase of Telos ID) after taking into account the stock split described below. The percentages assume the underwriters do not exercise their option to purchase any additional shares. Unless otherwise noted, the address for each stockholder listed on the table below is: c/o Telos Corporation, 19866 Ashburn Road, Ashburn, Virginia 20147. The information in the table gives effect to the approximate 0.794-for-1 stock split with respect to our common stock, which took effect November 12, 2020.

The table below does not reflect any shares of common stock our directors and officers may purchase through the Directed Share Program. See “Underwriting—Directed Share Program.”

The following description summarizes the most important terms of our capital stock. This summary does not purport to be complete and is qualified in its entirety by the provisions of our Second Amended and Restated Articles of Incorporation, a copy of which has been incorporated by reference or filed as exhibits to the registration statement of which this prospectus is a part. For a complete description of our capital stock, you should refer to our Second Amended and Restated Articles of Incorporation and to the applicable provisions of Maryland law.

Our authorized capital stock consists of 250,000,000 shares of common stock, $0.001 par value per share, and 10,000,000 shares of preferred stock, $0.01 par value per share. Our Second Amended and Restated Articles of Incorporation authorize our Board of Directors to classify or reclassify shares of our stock in one or more classes or series, to cause the issuance of additional shares of our stock, and to amend our charter without stockholder approval to increase or decrease the number of shares of stock that we have authority to issue. As of November 12, 2020, there were 39,062,238 shares of our common stock issued and outstanding, 7,459,913 shares of common stock reserved for issuance for future grants under the Telos Corporation 2016 Omnibus Long-Term Incentive Plan, and 900,970 shares issuable upon the exercise of the Warrants, after giving effect to the 0.794-for-1 stock split. Upon completion of this offering, there will be 63,340,189 shares (or 62,439,219 basic shares excluding the impact of the Warrants) of common stock outstanding and no shares of preferred stock outstanding.

Subject to preferences that may apply to any shares of preferred stock outstanding at the time, the holders of our common stock will be entitled to receive dividends out of funds legally available if our Board of Directors, in its discretion, determines to issue dividends and then only at the times and in the amounts that our Board of Directors may determine.

Holders of our common stock are entitled to one vote for each share held on all matters properly submitted to a vote of stockholders on which holders of common stock are entitled to vote. We have not provided for cumulative voting for the election of directors in our Second Amended and Restated Articles of Incorporation. The directors will be elected by a plurality of the outstanding shares entitled to vote on the election of directors.

Our common stock is not entitled to preemptive rights, and is not subject to conversion, redemption or sinking fund provisions. Upon the consummation of the offering described in this prospectus, holders of our common stock will not be entitled to exercise any rights of an objecting stockholder under Title 3, Subtitle 2 of the MGCL, or any successor statute, unless otherwise determined by the Board of Directors.

If we become subject to a liquidation, dissolution or winding-up, the assets legally available for distribution to our stockholders would be distributable ratably among the holders of our common stock and any participating preferred stock outstanding at that time, subject to prior satisfaction of all outstanding debt and liabilities and the preferential rights of and the payment of liquidation preferences, if any, on any outstanding shares of preferred stock.

We are subject to Subtitle 6 of Title 3 of the MGCL, the Maryland Business Combination Act. The Business Combination Act may discourage third parties from trying to acquire control of us and increase the difficulty of consummating such an offer.

We are subject to Subtitle 7 of Title 3 of the MGCL, the Maryland Control Share Acquisition Act. Our bylaws exempt from the Maryland Control Share Acquisition Act acquisitions of our common stock by any person. If we amend our bylaws to repeal the exemption from the Control Share Acquisition Act, the Control Share Acquisition Act also may make it more difficult for a third party to obtain control of us and increase the difficulty of consummating such an offer.

Our Board of Directors is authorized, subject to limitations prescribed by Maryland law, to issue preferred stock in one or more series, to establish from time to time the number of shares to be included in each series, and to fix the designation, powers, preferences and rights of the shares of each series and any of its qualifications, limitations or restrictions, in each case without further vote or action by our stockholders. Our Board of Directors can also increase or decrease the number of shares of any series of preferred stock, without any further vote or action by our stockholders. Our Board of Directors may authorize the issuance of preferred stock with voting or conversion rights that could adversely affect the voting power or other rights of the holders of our common stock or other series of preferred stock. The issuance of preferred stock, while providing flexibility in connection with possible financings, acquisitions and other corporate purposes, could, among other things, have the effect of delaying, deferring or preventing a change in our control of our company and might adversely affect the market price of our common stock and the voting and other rights of the holders of our common stock.

Sales of substantial numbers of shares of our common stock or the perception of such sales could adversely affect the market price of our common stock prevailing from time to time. As described below, only a limited number of shares will be available for sale shortly after the completion of this offering due to contractual and legal restrictions on resale. There may nevertheless be sales of substantial amounts of our common stock in the public market before (to the extent permitted) or after such restrictions lapse. This may adversely affect the prevailing market price at such time and our ability to raise equity capital in the future.

Upon completion of this offering, we will have a total of 63.3 million shares (or 62.4 million basic shares excluding the impact of the Warrants) of common stock outstanding (or a maximum of 65.6 million fully diluted shares if the underwriters exercise in full their option to purchase additional shares). Of these outstanding shares, all the shares of common stock sold in this offering, plus any shares sold upon exercise of the underwriters’ option to purchase additional shares, as well as the shares of common stock issuable in connection with the ERPS Conversion will be freely tradable without restrictions or further registration under the Securities Act, unless the shares are (i) owned by our “affiliates” as that term is defined in Rule 144 under the Securities Act or (ii) subject to the lock-up agreements described below or in “Purchase of Telos ID.”

Our officers, directors and other significant holders of our capital stock, including Hoya or its members, have entered into or will enter into lock-up agreements with the underwriters, subject to certain exceptions more fully described in “Underwriting,” not to dispose of or hedge any of their common stock or securities convertible into or exchangeable for shares of common stock during the period from the date of this prospectus continuing through the date 180 days after the date of this prospectus, except with the prior consent of B. Riley Securities, Inc. Holders of approximately 34.3 million shares of our common stock are subject to these lock-up agreements. See “Underwriting” for additional information.

In general, under Rule 144 as currently in effect, because we have been subject to the public company reporting requirements of Section 13 or Section 15(d) of the Exchange Act for at least 90 days, a person who has beneficially owned restricted shares of our common stock for at least six months (including the holding period of any prior owner other than one of our affiliates) is entitled to sell those shares without complying with any of the other provisions of Rule 144, subject to our being current in our Exchange Act reporting requirements. If such a person has beneficially owned the shares proposed to be sold for at least one year, including the holding period of any prior owner other than our affiliates, then that person would be entitled to sell those shares without complying with any of the requirements of Rule 144.

In general, under Rule 144, as currently in effect, and upon expiration of the lock-up agreements described above, our affiliates or persons selling shares on behalf of our affiliates are entitled to sell within any three-month period, a number of shares that does not exceed the greater of:

provided, in each case, that we have been subject to the Exchange Act periodic reporting requirements for at least 90 days before the sale. Sales under Rule 144 by our affiliates or persons selling shares on behalf of our affiliates are also subject to certain manner of sale, current public information and notice provisions of Rule 144. In addition, if an affiliate, during any three-month period, sells more than 5,000 shares or shares with an aggregate sale price in excess of $50,000, the seller also must file a notice on Form 144 with the SEC and Nasdaq concurrently with either the placing of a sale order with the broker or the execution directly with a market maker.

We are unable to estimate the number of shares that will be sold under Rule 144 since this will depend on the market price for our common stock, the personal circumstances of the stockholder and other factors.

Rule 701 generally allows a stockholder who purchased shares of our common stock pursuant to a written compensatory plan or contract and who is not deemed to have been an affiliate of our company during the immediately preceding 90 days to sell these shares in reliance upon Rule 144, but without being required to comply with the public information, holding period, volume limitation or notice provisions of Rule 144. Rule 701 also permits affiliates of our company to sell their Rule 701 shares under Rule 144 without complying with the holding period requirements of Rule 144.

Following the completion of this offering, we intend to file a registration statement on Form S-8 under the Securities Act to register shares of our common stock issued or reserved for issuance under our 2016 Plan. The registration statement on Form S-8 will become effective immediately upon filing, and shares covered by that registration statement will thereupon be eligible for sale in the public markets, subject to vesting restrictions, the lock-up agreements described above and Rule 144 limitations applicable to affiliates.

The following is a summary of the material U.S. federal income tax consequences relating to the acquisition, ownership, and disposition of common stock acquired pursuant to this offering by non-U.S. holders (as defined below). This summary deals only with common stock held as a capital asset (within the meaning of Section 1221 of the Code) and does not discuss the U.S. federal income tax consequences applicable to a non-U.S. holder that is subject to special treatment under U.S. federal income tax laws, including, but not limited to: a dealer in securities or currencies; a broker-dealer; a financial institution; a qualified retirement plan, individual retirement plan, or other tax-deferred account; a regulated investment company; a real estate investment trust; a tax-exempt organization; an insurance company; a person holding common stock as part of a hedging, integrated, conversion, or straddle transaction or a person deemed to sell common stock under the constructive sale provisions of the Code; a trader in securities that has elected the mark-to-market method of tax accounting; an accrual method taxpayer subject to special tax accounting rules under Section 451(b) of the Code; an entity that is treated as a partnership for U.S. federal income tax purposes; a person that received such common stock in connection with services provided; a corporation that accumulates earnings to avoid U.S. federal income tax; a corporation organized outside the United States, any state thereof or the District of Columbia that is nonetheless treated as a U.S. taxpayer for U.S. federal income tax purposes; a person that is not a non-U.S. holder; a “controlled foreign corporation;” a “passive foreign investment company;” or a U.S. expatriate.

This summary is based upon provisions of the Code, its legislative history, applicable U.S. Treasury regulations promulgated thereunder, published rulings, and judicial decisions, all as in effect as of the date hereof. We have not sought, and will not seek, any ruling from the Internal Revenue Service, or IRS, with respect to the tax consequences discussed herein, and there can be no assurance that the IRS will not take a position contrary to the tax consequences discussed below or that any position taken by the IRS would not be sustained. Those authorities may be repealed, revoked, or modified, perhaps retroactively, or may be subject to differing interpretations, which could result in U.S. federal income tax consequences different from those discussed below. This summary does not address all aspects of U.S. federal income tax, does not deal with all tax considerations that may be relevant to stockholders in light of their personal circumstances, and does not address any state, local, foreign, gift, estate (except to the limited extent set forth herein), or alternative minimum tax considerations.

For purposes of this discussion, a “U.S. holder” is a beneficial holder of common stock that is for U.S. federal income tax purposes: an individual citizen or resident of the United States; a corporation (or any other entity treated as a corporation for U.S. federal income tax purposes) created or organized in or under the laws of the United States, any state thereof or the District of Columbia; an estate the income of which is subject to U.S. federal income taxation regardless of its source; or a trust if it (1) is subject to the primary supervision of a court within the United States and one or more U.S. persons have the authority to control all substantial decisions of the trust, or (2) was in existence on August 20, 1996 and has a valid election in effect under applicable U.S. Treasury regulations to be treated as a U.S. person.

For purposes of this discussion, a “non-U.S. holder” is a beneficial owner of common stock that is neither a U.S. holder nor a partnership (or any other entity or arrangement that is treated as a partnership) for U.S. federal income tax purposes regardless of its place of organization or formation. If a partnership (or an entity or arrangement that is treated as a partnership for U.S. federal income tax purposes) holds common stock, the tax treatment of a partner will generally depend upon the status of the partner and the activities of the partnership. A partner of a partnership holding common stock is urged to consult its own tax advisors.

PROSPECTIVE INVESTORS ARE URGED TO CONSULT THEIR OWN TAX ADVISORS CONCERNING THE U.S. FEDERAL INCOME, ESTATE, AND OTHER TAX CONSEQUENCES OF ACQUIRING, OWNING, AND DISPOSING OF OUR COMMON STOCK IN LIGHT OF THEIR SPECIFIC SITUATIONS, AS WELL AS THE TAX CONSEQUENCES ARISING UNDER ANY STATE, LOCAL, OR NON-U.S. TAX LAWS AND ANY OTHER U.S. FEDERAL TAX LAWS (INCLUDING THE U.S. FEDERAL ESTATE AND GIFT TAX LAWS).

Distributions with respect to common stock, if any, generally will constitute dividends for U.S. federal income tax purposes to the extent paid out of current or accumulated earnings and profits, as determined for U.S. federal income tax purposes. Any portion of a distribution in excess of current or accumulated earnings and profits will

be treated as a return of capital and will first be applied to reduce the holder’s tax basis in its common stock, but not below zero. Any remaining amount will then be treated as gain from the sale or exchange of the common stock and will be treated as described under “—Disposition of Our Common Stock” below.

Distributions treated as dividends that are paid to a non-U.S. holder, if any, with respect to shares of our common stock will be subject to U.S. federal withholding tax at a rate of 30% (or such lower rate as may be specified in an applicable income tax treaty) of the gross amount of the dividends unless the dividends are effectively connected with the non-U.S. holder’s conduct of a trade or business in the United States subject to the discussion below regarding foreign accounts. If a non-U.S. holder is engaged in a trade or business in the United States and dividends with respect to the common stock are effectively connected with the conduct of that trade or business and, if required by an applicable income tax treaty, are attributable to a U.S. permanent establishment, then although the non-U.S. holder will generally be exempt from the 30% U.S. federal withholding tax, provided certain certification requirements are satisfied, the non-U.S. holder will be subject to U.S. federal income tax on those dividends on a net income basis at regular graduated U.S. federal income tax rates in the same manner as if such holder were a resident of the United States. Any such effectively connected income received by a foreign corporation may, under certain circumstances, be subject to an additional branch profits tax equal to 30% (or lower applicable income tax treaty rate) of its effectively connected earnings and profits for the taxable year, as adjusted under the Code. To claim the exemption from withholding with respect to any such effectively connected income, the non-U.S. holder must generally furnish to us or our paying agent a properly executed IRS Form W-8ECI (or applicable successor form). In the case of a non-U.S. holder that is an entity, Treasury regulations and the relevant tax treaty provide rules to determine whether, for purposes of determining the applicability of a tax treaty, dividends will be treated as paid to the entity or to those holding an interest in that entity. If a non-U.S. holder holds stock through a financial institution or other agent acting on the holder’s behalf, the holder will be required to provide appropriate documentation to such agent. Such holder’s agent will then be required to provide certification to us or our paying agent.

A non-U.S. holder of shares of common stock who wishes to claim the benefit of a reduced rate of withholding tax under an applicable treaty must furnish to us or our paying agent a valid IRS Form W-8BEN or IRS Form W-8BEN-E (or applicable successor form) certifying such holder’s qualification for the exemption or reduced rate. If a non-U.S. holder is eligible for a reduced rate of U.S. withholding tax pursuant to an income tax treaty and does not timely file the required certification, it may obtain a refund of any excess amounts withheld by timely filing an appropriate claim for refund with the IRS. Non-U.S. holders are urged to consult their tax advisors regarding their entitlement to benefits under a relevant income tax treaty.

Subject to the discussion below regarding backup withholding, a non-U.S. holder generally will not be subject to U.S. federal income tax on any gain from a sale, exchange or other disposition of our stock unless: (a) that gain is effectively connected with the non-U.S. holder’s conduct of a trade or business in the United States (and, if required by an applicable income tax treaty, is attributable to a U.S. permanent establishment maintained by the non-U.S. holder); (b) the non-U.S. holder is a nonresident alien individual who is present in the United States for 183 days or more in the taxable year of that disposition, and certain other conditions are met; or (c) we are or have been a “United States real property holding corporation” within the meaning of Code Section 897(c)(2) for U.S. federal income tax purposes at any time during the shorter of the five-year period preceding the date of disposition or the holder’s holding period for our common stock, and certain other requirements are met. Although there can be no assurance, we believe that we are not, and we do not anticipate becoming, a United States real property holding corporation for U.S. federal income tax purposes. Even if we are treated as a United States real property holding corporation, gain realized by a non-U.S. holder on a disposition of our common stock will not be subject to U.S. federal income tax so long as (1) the non-U.S. holder owned, directly, indirectly and constructively, no more than 5% of our common stock at all times within the shorter of (x) the five-year period preceding the disposition, or (y) the holder’s holding period, and (2) our common stock is regularly traded on an established securities market. There can be no assurance that our common stock will continue to qualify as regularly traded on an established securities market. If any gain on your disposition is taxable because we are a United States real property holding corporation and your ownership of our common stock exceeds 5%, you will be taxed on such disposition generally in the manner applicable to U.S. persons and in addition, a purchaser of your common stock may be required to withhold tax with respect to that obligation.

If a non-U.S. holder is described in clause (a) of the preceding paragraph, the non-U.S. holder will generally be subject to tax on the net gain derived from the disposition at the regular graduated U.S. federal income tax rates in the same manner as if such non-U.S. holder were a U.S. person, unless an applicable income tax treaty provides otherwise. In addition, a non-U.S. holder that is a corporation may be subject to the branch profits tax at a rate equal to 30% (or lower applicable income tax treaty rate) of its effectively connected earnings and profits. If the non-U.S. holder is an individual described in clause (b) of the preceding paragraph, the non-U.S. holder will generally be subject to a flat 30% tax on the gain derived from the disposition, which may be offset by U.S.-source capital losses even though the non-U.S. holder is not considered a resident of the United States, provided that the non-U.S. holder has timely filed U.S. federal income tax returns with respect to such losses.

The estate of a nonresident alien individual is generally subject to U.S. federal estate tax on property it is treated as the owner of, or has made certain life transfers of, having a U.S. situs. Because we are a U.S. corporation, our common stock will be U.S. situs property and therefore will be included in the taxable estate of a nonresident alien decedent for U.S. federal estate tax purposes, unless an applicable estate tax treaty between the United States and the decedent’s country of residence provides otherwise.

We report to our non-U.S. holders and the IRS certain information with respect to any dividends we pay on our common stock, including the amount of dividends paid during each fiscal year, the name and address of the recipient, and the amount, if any, of tax withheld. All distributions to holders of common stock are subject to any applicable withholding. Information reporting requirements apply even if no withholding was required because the distributions were effectively connected with the non-U.S. holder’s conduct of a U.S. trade or business or withholding was reduced by an applicable income tax treaty. This information also may be made available under a specific treaty or agreement with the tax authorities in the country in which the non-U.S. holder resides or is established. Under U.S. federal income tax law, interest, dividends, and other reportable payments may, under certain circumstances, be subject to “backup withholding” at the then applicable rate (currently, 24%). Backup withholding, however, generally will not apply to distributions on our common stock to a non-U.S. holder, provided the non-U.S. holder furnishes to us or our paying agent the required certification as to its non-U.S. status, such as by providing a valid IRS Form W-8BEN, IRS Form W-8BEN-E or IRS Form W-8ECI, or certain other requirements are met. Notwithstanding the foregoing, backup withholding may apply if either we or our paying agent has actual knowledge, or reason to know, that the holder is a U.S. person that is not an exempt recipient. Backup withholding is not an additional tax but merely an advance payment, which may be credited against the tax liability of persons subject to backup withholding or refunded to the extent it results in an overpayment of tax and the appropriate information is timely supplied to the IRS.

Information reporting and backup withholding will generally apply to the proceeds of a disposition of our common stock by a non-U.S. holder effected by or through the U.S. office of any broker, U.S. or foreign, unless the holder certifies its status as a non-U.S. holder and satisfies certain other requirements, or otherwise establishes an exemption. Generally, information reporting and backup withholding will not apply to a payment of disposition proceeds to a non-U.S. holder where the transaction is effected outside the United States through a non-U.S. office of a broker. However, information reporting but not backup withholding will apply in a manner similar to dispositions effected through a U.S. office of a broker, if a non-U.S. holder sells our common stock through a non-U.S. office of a broker that has certain connections with the United States.

Certain withholding taxes may apply to certain types of payments made to “foreign financial institutions” (as specially defined under these rules) and certain other non-U.S. entities if certification, information reporting and other specified requirements are not met. A 30% withholding tax may apply to “withholdable payments” if they are paid to a foreign financial institution or to a non-financial foreign entity, unless (a) the foreign financial institution undertakes certain diligence and reporting obligations and other specified requirements are satisfied, or (b) the non-financial foreign entity either certifies it does not have any substantial U.S. owners or furnishes identifying information regarding each substantial U.S. owner and other specified requirements are satisfied. “Withholdable payment” generally means any payment of interest, dividends, rents, and certain other types of generally passive income if such payment is from sources within the United States. U.S. Treasury Regulations

proposed in December 2018 (and upon which taxpayers and withholding agents are entitled to rely) eliminate possible withholding under these rules on the gross proceeds from any sale or other disposition of our common stock, previously scheduled to apply beginning January 1, 2019. If the payee is a foreign financial institution, it must enter into an agreement with the U.S. Treasury requiring, among other things, that it undertake to identify accounts held by certain U.S. persons or U.S.-owned foreign entities, annually report certain information about such accounts and withhold 30% on payments to account holders whose actions prevent it from complying with these reporting and other requirements, or comply with comparable requirements under an applicable inter-governmental agreement between the United States and the foreign financial institution’s home jurisdiction. If an investor does not provide us with the information necessary to comply with these rules, it is possible that distributions to such investor that are attributable to withholdable payments, such as dividends, will be subject to the 30% withholding tax. Holders should consult their own tax advisers regarding the implications of these rules for their investment in our common stock.

We have entered into an underwriting agreement with B. Riley Securities, Inc., BMO Capital Markets Corp. and Needham & Company, LLC, as representatives of the underwriters named below, with respect to the shares subject to this offering. Subject to the terms and conditions in the underwriting agreement, we have agreed to sell to the underwriters, and each underwriter has, severally and not jointly, agreed to purchase from us on a firm commitment basis, the respective number of shares of our common stock set forth opposite its name in the table below:

The underwriting agreement provides that the obligation of the underwriters to purchase all of the shares being offered to the public is subject to approval of legal matters by counsel and the satisfaction of other conditions. These conditions include, among others, the continued accuracy of representations and warranties made by us in the underwriting agreement, delivery of legal opinions and the absence of any material changes in our assets, business or prospects after the date of this prospectus. The underwriters are obligated to purchase all of our shares in this offering, other than those covered by the over-allotment option described below, if they purchase any of our shares.

The representatives of the underwriters have advised us that the underwriters propose to offer the common stock directly to the public at the public offering prices listed on the cover page of this prospectus and to selected dealers, who may include the underwriters, at the public offering price less a selling concession not in excess of $0.6375 per share for the common stock. After the completion of this offering, the underwriters may change the offering price and other selling terms.

Pursuant to the underwriting agreement, we have agreed to indemnify the underwriters against certain liabilities, including liabilities under the Securities Act, or to contribute to payments which the underwriters or other indemnified parties may be required to make in respect of any such liabilities.

We have been approved to have our common stock listed on the Nasdaq Global Market under the symbol “TLS”.

Prior to this offering, there has been no public market for our common stock. The initial public offering price will be determined by negotiations between us and the representatives of the underwriters. In determining the initial public offering price, we and the representatives of the underwriters expect to consider a number of factors including:

Neither we nor the underwriters can assure investors that an active trading market will develop for the shares of our common stock, or that the shares will trade in the public market at or above the initial public offering price.

We have granted the underwriters an over-allotment option. This option, which is exercisable for up to 30 days after the date of this prospectus, permits the underwriters to purchase a maximum of 2,245,328 additional shares from us to cover over-allotments, if any. If the underwriters exercise all or part of this option, each underwriter will be obligated to purchase its proportionate number of shares covered by the option at the public offering price that appears on the cover page of this prospectus, less the underwriting discounts and commissions.

The following table provides information regarding the amount of the underwriting discounts and commissions to be paid to the underwriters by us. These amounts are shown assuming both no exercise and full exercise of the underwriters’ option to purchase additional shares to cover over-allotments, if any.

The estimated offering expenses payable by us, exclusive of the underwriting discounts and commissions, are approximately $3.4 million (or approximately $3.7 million if the underwriters’ option to purchase additional shares is exercised in full), which includes Company legal, accounting and printing costs and various other fees associated with registration and listing of our common stock. We have agreed to reimburse the representatives for its reasonable out-of-pocket expenses actually incurred in the offering, other than fees and disbursements of legal counsel to the representatives. We agreed to reimburse reasonable fees and disbursements of the representatives’ legal counsel actually incurred up to $350,000 if the offering is not consummated. If the offering is not consummated within a specified period agreed to by and between B. Riley Securities, Inc. and us and any person purchases securities from us in a public offering pursuant to a registration statement filed with the SEC within six months thereafter, we will pay B. Riley Securities, Inc. a termination fee equal to 6.25% of the price paid by the purchaser of such securities, subject to FINRA Rule 5110(g)(5). As part of the total $3.4 million in expenses, we have agreed to pay to B. Riley Securities, Inc. an advisory fee equal to 0.75% of the gross proceeds of this offering for its role as capital markets advisor in negotiations on our behalf with the holders of our Exchangeable Redeemable Preferred Stock in connection with the ERPS Conversion.

At our request, the underwriters have reserved, at the initial public offering price, 617,647 shares of our common stock in this offering for sale to our directors, officers, employees, and certain friends and family members of these persons, and certain clients and prospective clients, as part of a directed share program. We will offer these shares to the extent permitted under applicable regulations. The number of shares of common stock available for sale in this offering will be reduced to the extent that such persons purchase such reserved shares. Any reserved shares not so purchased will be offered by the underwriters on the same basis as the other shares of common stock offered hereby. Participants in the directed share program who purchase more than $500,000 of shares, as well as directors or executive officers who are already subject to lock-up agreements, shall be subject to 180-day lock-ups. Any of these lock-up agreements will have similar restrictions to the lock-up agreements described herein.

Our executive officers and certain of our directors (other than our Class D directors) and other significant holders of our capital stock, including Hoya or its members, have agreed to a 180-day “lock-up” from the date of this prospectus relating to shares of our common stock that they beneficially own. This means that, for a period of 180 days following the date of this prospectus, such persons may not offer, sell, pledge or otherwise dispose of these securities without the prior written consent of the representatives, subject to certain exceptions.

The representatives may, in their sole discretion and at any time or from time to time, release all or any portion of the common stock or other securities subject to the lock-up agreement. Any determination to release any common stock would be based upon a number of factors at the time of determination, which may include the market price of the common stock, the liquidity of the trading market of the common stock, general market conditions, the number of shares of common stock or other securities proposed to be sold or otherwise transferred and the timing, purposes and terms of the proposed sale or other transfer. The representatives do not have any present intention, agreement or understanding, implicit or explicit, to release any of the shares of common stock or other securities subject to the lock-up agreements prior to the expiration of the lock-up period described above.

In addition, the underwriting agreement provides that, subject to certain exceptions, we will not, for a period of 180 days following the date of this prospectus, offer, sell or distribute any of our securities, without the prior written consent of the underwriters.

Until the distribution of the securities offered by this prospectus is completed, rules of the SEC may limit the ability of the underwriters to bid for and to purchase our common stock. As an exception to these rules, the underwriters may engage in transactions effected in accordance with Regulation M under the Exchange Act that are intended to stabilize, maintain or otherwise affect the price of our common stock. The underwriters may engage in over-allotment sales, syndicate covering transactions, stabilizing transactions and penalty bids in accordance with Regulation M:

These stabilizing transactions, covering transactions and penalty bids may have the effect of raising or maintaining the market price of our common stock or preventing or retarding a decline in the market price of our common stock. As a result, the price of our common stock may be higher than the price that might otherwise exist in the open market.

Neither we nor the underwriters make any representation or prediction as to the effect that the transactions described above may have on the prices of our common stock. These transactions may occur on any trading market. If any of these transactions are commenced, they may be discontinued without notice at any time.

This prospectus may be made available in electronic format on Internet sites or through other online services maintained by the underwriters or their affiliates. In those cases, prospective investors may view offering terms online and may be allowed to place orders online. Other than this prospectus in electronic format, any information on the underwriters’ or their affiliates’ websites and any information contained in any other website maintained by the underwriters or any affiliate of the underwriters is not part of this prospectus or the registration statement of which this prospectus forms a part, has not been approved and/or endorsed by us or the underwriters and should not be relied upon by investors.

This document constitutes an “exempt offering document” as defined in and for the purposes of applicable Canadian securities laws. No prospectus has been filed with any securities commission or similar regulatory authority in Canada in connection with the offer and sale of shares of common stock described herein (the “Securities”). No securities commission or similar regulatory authority in Canada has reviewed or in any way passed upon this document or on the merits of the Securities and any representation to the contrary is an offence.

Canadian investors are advised that this document has been prepared in reliance on section 3A.3 of National Instrument 33-105 Underwriting Conflicts (“NI 33-105”). Pursuant to section 3A.3 of NI 33-105, this document is exempt from the requirement that the issuer and the underwriters in the offering provide Canadian investors with certain conflicts of interest disclosure pertaining to “connected issuer” and/or “related issuer” relationships as may otherwise be required pursuant to subsection 2.1(1) of NI 33-105.

The offer and sale of the Securities in Canada are being made on a private placement basis only and are exempt from the requirement that the issuer prepare and file a prospectus under applicable Canadian securities laws. Any resale of Securities acquired by a Canadian investor in this offering must be made in accordance with applicable Canadian securities laws, which may vary depending on the relevant jurisdiction, and which may require resales to be made in accordance with Canadian prospectus requirements, a statutory exemption from the prospectus requirements, in a transaction exempt from the prospectus requirements or otherwise under a discretionary exemption from the prospectus requirements granted by the applicable local Canadian securities regulatory authority. These resale restrictions may under certain circumstances apply to resales of the Securities outside of Canada.

Each Canadian investor who purchases the Securities will be deemed to have represented to the issuer, the underwriters and each dealer from whom a purchase confirmation is received, as applicable, that the investor (i) is purchasing as principal, or is deemed to be purchasing as principal in accordance with applicable Canadian securities laws, for investment only and not with a view to resale or redistribution; (ii) is an “accredited investor” as such term is defined in section 1.1 of National Instrument 45-106 Prospectus Exemptions or, in Ontario, as such term is defined in section 73.3(1) of the Securities Act (Ontario); and (iii) is a “permitted client” as such term is defined in section 1.1 of National Instrument 31-103 Registration Requirements, Exemptions and Ongoing Registrant Obligations.

Any discussion of taxation and related matters contained in this document does not purport to be a comprehensive description of all of the tax considerations that may be relevant to a Canadian investor when deciding to purchase the Securities and, in particular, does not address any Canadian tax considerations. No representation or warranty is hereby made as to the tax consequences to a resident, or deemed resident, of Canada of an investment in the Securities or with respect to the eligibility of the Securities for investment by such investor under relevant Canadian federal and provincial legislation and regulations.

Securities legislation in certain provinces or territories of Canada may provide a purchaser with remedies for rescission or damages if this prospectus (including any amendment thereto) contains a misrepresentation,

provided that the remedies for rescission or damages are exercised by the purchaser within the time limit prescribed by the securities legislation of the purchaser's province or territory. The purchaser should refer to any applicable provisions of the securities legislation of the purchaser's province or territory for particulars of these rights or consult with a legal advisor.

We and the representatives hereby notify prospective Canadian purchasers that: (a) we may be required to provide personal information pertaining to the purchaser as required to be disclosed in Schedule I of Form 45-106F1 under NI 45-106 (including its name, address, telephone number, email address, if provided, and the number and type of securities purchased, the total purchase price paid for such securities, the date of the purchase and specific details of the prospectus exemption relied upon under applicable securities laws to complete such purchase) (“personal information”), which Form 45-106F1 may be required to be filed by us under NI 45-106, (b) such personal information may be delivered to the securities regulatory authority or regulator in accordance with NI 45-106, (c) such personal information is being collected indirectly by the securities regulatory authority or regulator under the authority granted to it under the securities legislation of the applicable legislation, (d) such personal information is collected for the purposes of the administration and enforcement of the securities legislation of the applicable jurisdiction, and (e) the purchaser may contact the applicable securities regulatory authority or regulator by way of the contact information provided in Schedule 2 to Form 45-106F1. Prospective Canadian purchasers that purchase securities in this offering will be deemed to have authorized the indirect collection of the personal information by each applicable securities regulatory authority or regulator, and to have acknowledged and consented to such information being disclosed to the Canadian securities regulatory authority or regulator, and to have acknowledged that such information may become available to the public in accordance with requirements of applicable Canadian laws.

Upon receipt of this document, each Canadian investor hereby confirms that it has expressly requested that all documents evidencing or relating in any way to the sale of the Securities described herein (including for greater certainty any purchase confirmation or any notice) be drawn up in the English language only. Par la réception de ce document, chaque investisseur canadien confirme par les présentes qu’il a expressément exigé que tous les documents faisant foi ou se rapportant de quelque manière que ce soit à la vente des valeurs mobilières décrites aux présentes (incluant, pour plus de certitude, toute confirmation d'achat ou tout avis) soient rédigés en anglais seulement.

In relation to the Member States of the European Economic Area and the United Kingdom (each, a “Relevant State”), no offer of shares of our common stock which are the subject of the offering contemplated by this prospectus to the public may be made in that Relevant State other than:

provided that no such offer of shares of our common stock described in this prospectus shall result in a requirement for the publication of a prospectus, by us or any of the underwriters, pursuant to Article 3 of the Prospectus Regulation.

Each purchaser of shares of our common stock described in this prospectus located within a Relevant State will be deemed to have represented, acknowledged and agreed that (1) it is a “qualified investor” within the meaning of the Prospectus Regulation; and (2) in the case of any shares of common stock acquired by it as a financial intermediary as that term is used in Article 5(1) of the Prospectus Regulation, each such financial intermediary will be deemed to have represented, acknowledged and agreed that the shares of common stock acquired by it in the offer have not been acquired on a non-discretionary basis on behalf of, nor have they been acquired with a view to their offer or resale to, persons in circumstances which may give rise to an offer to the public other than their offer or resale in a Relevant

State to qualified investors, as that term is defined in the Prospectus Regulation, or in circumstances in which the prior consent of the underwriters has been given to the offer or resale; or where shares of common stock have been acquired by it on behalf of persons in any Relevant State other than qualified investors, the offer of those shares of common stock to it is not treated under the Prospectus Regulation as having been made to such persons. For purposes of this provision, the expression an “offer to the public” in relation to the shares of our common stock in any Relevant State means the communication in any form and by any means of sufficient information on the terms of the offer and the shares of our common stock to be offered so as to enable an investor to decide to purchase or subscribe to the shares and the expression “Prospectus Regulation” means Regulation (EU) 2017/1129.

We and the underwriters have not authorized and do not authorize the making of any offer of shares of our common stock through any financial intermediary on their behalf, other than offers made by the underwriters with a view to the final placement of the shares as contemplated in this prospectus. Accordingly, no purchaser of the shares of our common stock, other than the underwriters, is authorized to make any further offer of the shares on behalf of us or the underwriters.

References to the Prospectus Regulation includes, in relation to the UK, the Prospectus Regulation as it forms part of UK domestic law by virtue of the European Union (Withdrawal) Act 2018.

The above selling restriction is in addition to any other selling restrictions set out below.

The communication of this prospectus and any other document or materials relating to the issue of the shares of our common stock offered hereby is not being made, and such documents and/or materials have not been approved, by an authorized person for the purposes of section 21 of the United Kingdom’s Financial Services and Markets Act 2000, as amended, or the FSMA. Accordingly, such documents and/or materials are not being distributed to, and must not be passed on to, the general public in the United Kingdom. The communication of such documents and/or materials as a financial promotion is only being made to those persons in the United Kingdom who have professional experience in matters relating to investments and who fall within the definition of investment professionals (as defined in Article 19(5) of the Financial Services and Markets Act 2000 (Financial Promotion) Order 2005, as amended, or the Financial Promotion Order), or who fall within Article 49(2)(a) to (d) of the Financial Promotion Order, or who are any other persons to whom it may otherwise lawfully be made under the Financial Promotion Order (all such persons together being referred to as “relevant persons”). In the United Kingdom, the shares of our common stock offered hereby are only available to, and any investment or investment activity to which this prospectus relates will be engaged in only with, relevant persons. Any person in the United Kingdom that is not a relevant person should not act or rely on this prospectus or any of its contents.

Any invitation or inducement to engage in investment activity (within the meaning of Section 21 of the FSMA) in connection with the issue or sale of the shares of our common stock may only be communicated or caused to be communicated in circumstances in which Section 21(1) of the FSMA does not apply to us.

All applicable provisions of the FSMA must be complied with in respect to anything done by any person in relation to the shares of our common stock in, from or otherwise involving the United Kingdom.

This prospectus has not been prepared in accordance with the requirements for a securities or sales prospectus under the German Securities Prospectus Act (Wertpapierprospektgesetz), the German Sales Prospectus Act (Verkaufsprospektgesetz), or the German Investment Act (Investmentgesetz). Neither the German Federal Financial Services Supervisory Authority (Bundesanstalt für finanzdienstleistungsaufsicht—BaFin) nor any other German authority has been notified of the intention to distribute our common stock in Germany. Consequently, the common stock may not be distributed in Germany by way of public offering, public advertisement or in any similar manner and this prospectus and any other document relating to this offering, as well as information or statements contained therein, may not be supplied to the public in Germany or used in connection with any offer for subscription of the common stock to the public in Germany or any other means of public marketing. The common stock is being offered and sold in Germany only to qualified investors which are referred to in Section 3 paragraph 2 no. 1, in connection with Section 2 no. 6, of the German Securities Prospectus Act, Section 8f paragraph 2 no. 4 of the German Sales Prospectus Act, and in Section 2 paragraph 11 sentence 2 no. 1 of the German Investment Act. This prospectus is strictly for use of the person who has received it. It may not be forwarded to other persons or published in Germany.

This document is not intended to constitute an offer or solicitation to purchase or invest in the securities. The securities may not be publicly offered, directly or indirectly, in Switzerland within the meaning of the Swiss Financial Services Act (“FinSA”) and no application has or will be made to admit the securities to trading on any trading venue (exchange or multilateral trading facility) in Switzerland. Neither this document nor any other offering or marketing material relating to the securities constitutes a prospectus pursuant to the FinSA, and neither this document nor any other offering or marketing material relating to the securities may be publicly distributed or otherwise made publicly available in Switzerland.

Neither this document nor any other offering or marketing material relating to the offering, the Company or the securities have been or will be filed with or approved by any Swiss regulatory authority. In particular, this document will not be filed with, and the offer of securities will not be supervised by, the Swiss Financial Market Supervisory Authority FINMA (FINMA), and the offer of securities has not been and will not be authorized under the Swiss Federal Act on Collective Investment Schemes (“CISA”). The investor protection afforded to acquirers of interests in collective investment schemes under the CISA does not extend to acquirers of the securities.

The validity of the shares of our common stock being offered by this prospectus will be passed upon for us by Miles & Stockbridge P.C., Baltimore, Maryland. Nelson Mullins Riley & Scarborough LLP, Washington, D.C., has acted as counsel for the underwriters.

The consolidated financial statements as of December 31, 2019 and 2018 and for each of the three years in the period ended December 31, 2019, included in this prospectus and in the Registration Statement have been so included in reliance on the report of BDO USA, LLP, an independent registered public accounting firm, appearing elsewhere herein and in the Registration Statement, given on the authority of said firm as experts in accounting and auditing.

The SEC permits us to “incorporate by reference” the information contained in documents we have filed with the SEC, which means that we can disclose important information to you by referring you to those documents rather than by including the information that they contain in this prospectus. Information that is incorporated by reference is considered to be part of this prospectus and you should read it with the same care that you read this prospectus. Any statement contained in a document incorporated by reference herein shall be deemed to be modified or superseded for purposes of this prospectus to the extent that a statement contained herein modifies or supersedes such statement. Any statement so modified or superseded shall not be deemed, except as so modified or superseded, to constitute a part of this prospectus.

This prospectus incorporates by reference the documents listed below except for information “furnished” under Items 2.02, 7.01 or 9.01 on Form 8-K or other information “furnished” to the SEC which is not deemed filed and not incorporated in this prospectus, unless expressly stated otherwise as set forth below:

Upon written or oral request, we will provide, without charge, to each person, including any beneficial owner, to whom a copy of this prospectus is delivered a copy of any or all of the reports or documents that have been

incorporated by reference in this prospectus, excluding exhibits to those documents, unless the exhibits are specifically incorporated by reference into those documents. You may request a copy of any or all of the documents incorporated by reference but not delivered with this prospectus, at no cost, by writing or telephoning us at the following address and number:

Telos Corporation

Attention: Corporate Secretary

19886 Ashburn Road

Ashburn, Virginia 20147

telephone: (703) 724-3800

We have filed with the SEC a registration statement on Form S-1 under the Securities Act, with respect to the shares of common stock being offered by this prospectus. This prospectus, which constitutes part of the registration statement, does not contain all of the information set forth in the registration statement or the exhibits and schedules filed therewith. Statements contained in this prospectus regarding the contents of any contract or any other document that is filed as an exhibit to the registration statement are not necessarily complete, and each such statement is qualified in all respects by reference to the full text of such contract or other document filed as an exhibit to the registration statement.

We are subject to the information and periodic requirements of the Exchange Act and, in accordance therewith, file annual, quarterly and current reports, proxy statements and other information with the SEC. The SEC maintains a website that contains reports, proxy and information statements and other information regarding registrants that file electronically with the SEC. The address is www.sec.gov. We also maintain a website at www.telos.com. You may access our annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, and amendments to those reports filed or furnished pursuant to Section 13(a) or 15(d) of the Exchange Act with the SEC free of charge as soon as reasonably practicable after they are electronically filed with, or furnished to, the SEC. The reference to our website does not constitute incorporation by reference of the information contained on or accessible through our website, and you should not consider the contents of our website in making an investment decision with respect to our common stock.

Shareholders and Board of Directors

Telos Corporation

Ashburn, Virginia

We have audited the accompanying consolidated balance sheets of Telos Corporation (the “Company”) and subsidiaries as of December 31, 2019 and 2018, the related consolidated statements of operations, comprehensive loss, stockholders’ deficit, and cash flows for each of the three years in the period ended December 31, 2019, and the related notes (collectively referred to as the “consolidated financial statements”). In our opinion, the consolidated financial statements present fairly, in all material respects, the financial position of the Company and subsidiaries at December 31, 2019 and 2018, and the results of their operations and their cash flows for each of the three years in the period ended December 31, 2019, in conformity with accounting principles generally accepted in the United States of America.

These consolidated financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on the Company’s consolidated financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (“PCAOB”) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audits to obtain reasonable assurance about whether the consolidated financial statements are free of material misstatement, whether due to error or fraud. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Company’s internal control over financial reporting. Accordingly, we express no such opinion.

Our audits included performing procedures to assess the risks of material misstatement of the consolidated financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the consolidated financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the consolidated financial statements. We believe that our audits provide a reasonable basis for our opinion.

/s/ BDO USA, LLP

We have served as the Company's auditor since 2007.

McLean, Virginia

April 10, 2020, except for the effects of disclosing earnings per share information discussed in Note 1, as to which the date is October 6, 2020, and except for the effects of the stock split discussed in Note 1, as to which the date is November 16, 2020.