TELOS CORP

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A INFORMATION

Proxy Statement Pursuant to Section 14(a) of the Securities

Exchange Act of 1934 (Amendment No. )

Filed by the Registrant ☑

Filed by a Party other than the Registrant ☐

Check the appropriate box:

(Name of Registrant as Specified In Its Charter)

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

Payment of Filing Fee (Check all boxes that apply):

19886 Ashburn Road, Ashburn, Virginia 20147-2358

NOTICE OF ANNUAL MEETING OF STOCKHOLDERS

To Be Held on Thursday, May 7, 2026

NOTICE IS HEREBY GIVEN that the Annual Meeting of Stockholders (the “Annual Meeting”) of Telos Corporation, a Maryland corporation (the “Company”), will be held in the Meeting Room at the Company’s headquarters located at 19886 Ashburn Road, Ashburn, Virginia, 20147-2358, on Thursday, May 7, 2026, at 10:00 a.m. EDT.

The Annual Meeting is being held for the following purposes:

The foregoing items of business are more fully described in the Proxy Statement accompanying this Notice.

The Board of Directors has fixed the close of business on March 10, 2026, as the record date for determining the stockholders entitled to notice of and to vote at the Annual Meeting or any adjournment or postponement thereof.

We will be using the SEC’s Notice and Access model, which allows us to make the proxy materials available on the Internet as the primary means of furnishing proxy materials to stockholders. On or about March 27, 2026, we will mail to all stockholders a Notice of Internet Availability of Proxy Materials, which contains instructions for accessing our proxy materials on the Internet and voting by telephone or on the Internet. The Notice of Internet Availability of Proxy Materials also contains instructions for requesting a printed set of proxy materials. The Notice of Annual Meeting and Proxy Statement, and the Annual Report on Form 10-K for the fiscal year ended December 31, 2025, are also available at: https://investors.telos.com.

Your vote is important to us. Whether you plan to participate in the Annual Meeting or not, please be sure to vote. Please vote promptly by telephone or on the Internet by following the instructions on your Notice of Internet Availability of Proxy Materials.

By order of the Board of Directors.

Helen M. Oh, Secretary

Ashburn, Virginia

March 27, 2026

19886 Ashburn Road, Ashburn, Virginia 20147-2358

PROXY STATEMENT

FOR THE ANNUAL MEETING OF STOCKHOLDERS

TO BE HELD ON MAY 7, 2026

This Proxy Statement is furnished by Telos Corporation, a Maryland corporation (“Telos”, the “Company”, “we”, “us” or “our”), to the holders of the Company’s Common Stock in connection with the Annual Meeting of Stockholders (“2026 Annual Meeting”) of the Company to be held on May 7, 2026, 10:00 a.m. EDT, for the purposes set forth in the accompanying Notice of Annual Meeting of Stockholders (“Annual Meeting Notice”).

The Company’s Board of Directors is soliciting proxies from holders of Common Stock, and the voting recommendations are:

The entire cost of soliciting these proxies will be borne by the Company. As needed, the Company will request brokers and others to send proxy forms and other proxy material to the beneficial owners of the Common Stock and reimbursement will be provided for any reasonable expenses incurred in so doing. If we deem necessary, the Company may also request its employees to solicit proxies from the stockholders personally or by telephone. The Company may retain a proxy solicitor to assist in the solicitation of proxies, for which the Company would pay usual and customary fees.

The Annual Meeting Notice, this Proxy Statement and the Annual Report on Form 10-K for the fiscal year ended December 31, 2025, are available athttps://materials.proxyvote.com/87969B and on the Company website athttp://investors.telos.com.

We are making the proxy materials available to stockholders on the Internet under the SEC’s Notice and Access model. We believe the electronic method of delivery under the Notice and Access model will decrease postage and printing expenses, expedite delivery of proxy materials and reduce our environmental impact, and we encourage you to take advantage of the availability of the proxy materials on the Internet. The Notice of Internet Availability of Proxy Materials includes instructions for accessing the proxy materials and voting by telephone or on the Internet. Stockholders will need their unique control number, which appears on their Notice of Internet Availability of Proxy Materials (printed in the box and marked by the arrow), the proxy card and the instructions that accompany the proxy materials in order to access the voting site. Beneficial stockholders who do not have a control number may gain access by logging into their broker, brokerage firm, bank, or other nominee’s (collectively referred to as “Nominee”) website and selecting the shareholder communications mailbox to link through to the 2026 Annual Meeting material. Instructions should also be provided on the voting instruction card provided by your Nominee.

If you would like to receive a full printed set of the proxy materials in the mail, please follow the instructions in the Notice of Internet Availability of Proxy Materials for requesting such materials.

Voting Procedures

Record Date. The record date for determining the stockholders entitled to vote at the 2026 Annual Meeting is March 10, 2026 (“Record Date”). As of the Record Date, there were 77,256,010 shares of Common Stock outstanding and entitled to vote at the 2026 Annual Meeting.

Votes. Each holder of Common Stock is entitled to one vote per share of Common Stock held for Proposals 1 through 4, and any other issue to be decided at the Annual Meeting.

Voting Methods. Instruction on voting is provided in the Notice of Internet Availability of Proxy Materials, which contains instructions for accessing our proxy materials on the Internet and voting by telephone or on the Internet.

If you hold shares of the Company directly in your name with our transfer agent, Broadridge Corporate Issuer Solutions, Inc., you are a “stockholder of record” or “registered stockholder”. If you are a stockholder of record, the Notice of Internet Availability of Proxy Materials has been sent directly to you by the Company or by our representative. If you own your shares indirectly through a Nominee, your shares are said to be held in “street name.” Technically, your Nominee will vote those shares. In this case, the Notice of Internet Availability of Proxy Materials will be forwarded to you by your broker, bank, other financial institution, or other designated representative. Through this process, your bank or broker collects voting instructions from all of its customers who hold shares of the Company and then submits those votes to us.

For shares held in “street name,” when a Nominee does not receive voting instructions from its customers, the question arises whether the Nominee nonetheless has the discretion to vote those shares. For routine matters, NASDAQ gives Nominees the discretion to vote, even if they have not received voting instructions from their customers or the “beneficial owners” of such shares. In this Proxy Statement, only the ratification of our independent registered public accounting firm, PricewaterhouseCoopers LLP, (Proposal 2) is a matter considered routine by NASDAQ. If you are a beneficial owner of shares of our Common Stock, your Nominee will NOT be able to vote your shares with respect to the election of directors (Proposal 1), the approval of Amendment No. 2 to the Amended and Restated 2016 Omnibus Long-Term Incentive Plan (Proposal 3), and the approval, on an advisory basis, of the compensation of the Company’s named executive officers (Proposal 4) unless you give your Nominee specific voting instructions. A “broker non-vote” occurs when your Nominee submits a proxy for your shares but does not indicate a vote for a particular proposal because the Nominee does not have the authority to vote on that proposal since the Nominee has not received instructions from you. Broker non-votes and abstentions are counted for purposes of determining whether a quorum is present. Only “FOR” and “AGAINST” votes are counted for purposes of determining the votes cast in connection with each proposal. Therefore, broker non-votes will not be counted as a vote “FOR” the election of directors in Proposal 1 and will have no effect on determining the result of the vote. Broker non-votes and abstentions will not be counted as a vote “FOR” or “AGAINST” Proposals 2 through 4 and will have no effect on the result of the vote.

Quorum and Vote Required. A quorum consists of stockholders representing a majority of the votes by holders of Common Stock entitled to be cast at the 2026 Annual Meeting. Directors are elected by a plurality of the votes cast by the holders of Common Stock if a quorum is present. Only votes cast “FOR” a nominee will be counted in the election of directors. Votes that are withheld with respect to one or more nominees will result in those nominees receiving fewer votes but will not count as a vote against the nominees. The affirmative vote of a majority of votes cast by the holders of Common Stock at the 2026 Annual Meeting if a quorum is present is required to ratify the appointment of the independent registered public accounting firm, to approve Amendment No. 2 to the Amended and Restated 2016 Omnibus Long-Term Incentive Plan, and to approve, on an advisory basis, the compensation of the Company’s named executive officers or “say-on-pay.” You have the right to vote “FOR” or “AGAINST,” or to “ABSTAIN” from voting, in connection with Proposals 2 through 4.

Meeting Attendance. Registered holders of the Common Stock who plan to attend the meeting in person should mark the attendance box on their proxy card, and bring a copy of the proxy card with them to the meeting. Ballots will also be available at the meeting. Beneficial owners of Common Stock that is held by a Nominee must provide adequate proof of ownership. In addition, due to security requirements at the Company’s headquarters, a government-issued photo identification will be required for admission to the 2026 Annual Meeting.

Revocation of Proxies. A registered holder of the Common Stock who has provided a proxy to the Company may revoke the proxy at any time before the underlying shares are voted at the 2026 Annual Meeting by:

Corporate Secretary

Telos Corporation

19886 Ashburn Road

Ashburn, VA 20147

If shares of Common Stock are held in the name of a Nominee, the beneficial owner of those shares must contact the Nominee in order to change a vote. The Inspector of Elections will record each vote according to the latest instructions received from the respective stockholder.