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Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

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Telos Corporation (the “Company”) has announced that John B. Wood, the Company’s President, Chief Executive Officer and Chairman of the Board, is taking a medical leave of absence. The duration of the leave is uncertain at this time.

Effective April 28, 2026, Mark Griffin, Executive Vice President, Security Solutions, Mark Bendza, Executive Vice President and Chief Financial Officer, and Hutch Robbins, Executive Vice President and General Counsel, under the oversight of and reporting to the Company’s Board of Directors, have assumed the responsibilities of the Chief Executive Officer on an interim basis. Fred Schaufeld has been appointed by the Board of Directors to serve as its Chairman on an interim basis effective immediately. The Board of Directors and executive leadership team are working closely to ensure continuity of the Company’s operations during Mr. Wood’s absence. The Company does not anticipate material disruption to its operations.

The Company expects to report first-quarter revenue and Adjusted EBITDA above the high end of the guidance range it provided on March 16, 2026 and to reaffirm its full-year outlook during its upcoming May 11, 2026 earnings call.

The information in this Item 2.02 is being furnished and shall not be deemed "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference into any filing under the Securities Act of 1933, as amended (the "Securities Act"), or the Exchange Act, except as expressly set forth by specific reference in such a filing.

This Form 8-K contains forward-looking statements which are made under the safe harbor provisions of the federal securities laws. These statements are based on the Company’s management’s current beliefs, expectations and assumptions about future events, conditions and results and on information currently available to them. 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. The Company believes that these risks and uncertainties include, but are not limited to, those described under the captions “Risk Factors” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations” set forth from time to time in the Company’s filings and reports with the U.S. Securities and Exchange Commission (SEC), including its Annual Report on Form 10-K for the year ended December 31, 2025, as well as subsequent and future filings and reports by the Company, copies of which are available at https://investors.telos.com and on the SEC’s website at www.sec.gov.

Although the Company bases these forward-looking statements on assumptions that its management believes are reasonable when made, the Company cautions the reader that forward-looking statements are not guarantees of future performance and that the Company’s 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 this release. Given these risks, uncertainties and other factors, many of which are beyond its control, the Company cautions the reader not to place undue reliance on these forward-looking statements. Any forward-looking statement speaks only as of the date of such statement and, except as required by law, the Company undertakes 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 the statement, 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.

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Date: April 29, 2026