KRATOS DEFENSE & SECURITY SOLUTIONS, INC.

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K

Commission file number 001-34460

(Exact name of Registrant as specified in its charter)

1 Chisholm Trail, Suite 300

Round Rock, TX 78681

(Address of principal executive offices) (Zip Code)

Registrant’s telephone number, including area code (512)238-9840

SECURITIES REGISTERED PURSUANT TO SECTION 12(b) OF THE ACT:

SECURITIES REGISTERED PURSUANT TO SECTION 12(g) OF THE ACT:

None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes ý No¨

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. Yes¨ No ý

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ý Noo

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ý Noo

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act:

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report. Yes ý No☐

If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing reflect the correction of an error to previously issued financial statements. o

Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by any of the registrant’s executive officers during the relevant recovery period pursuant to §240.10D-1(b). o

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes☐ Noý

The aggregate market value of the registrant’s voting and non-voting common equity held by non-affiliates as of June 29, 2025, the last business day of the registrant’s most recently completed second fiscal quarter, was approximately $6.5 billion, based on the closing sale price for shares of the registrant’s common stock as reported by the NASDAQ Global Select Market on such date. This disclosure excludes shares of common stock held by executive officers, directors and stockholders whose individual ownership exceeded 10% of the common stock outstanding on June 28, 2024 because such persons may be deemed to be affiliates. This determination of affiliate status is not necessarily a conclusive determination for any other purpose.

As of February 20, 2026,170,329,158 shares of the registrant’s common stock were outstanding.

Documents Incorporated by Reference

Items 10, 11, 12, 13 and 14 of Part III of this annual report on Form 10-K incorporate information by reference from the registrant’s definitive proxy statement to be filed pursuant to Regulation 14A in connection with the registrant’s 2026 Annual Meeting of Stockholders or an amendment to this annual report on Form 10-K to be filed with the Securities and Exchange Commission within 120 days after the close of the fiscal year covered by this annual report on Form 10-K.

FORM 10-K

FOR THE FISCAL YEAR ENDED DECEMBER 28, 2025

TABLE OF CONTENTS

All references to “us,” “we,” “our,” the “Company” and “Kratos” refer to Kratos Defense & Security Solutions, Inc., a Delaware corporation, and its subsidiaries.

FORWARD‑LOOKING STATEMENTS

This Annual Report on Form 10-K (this “Annual Report”) contains “forward-looking statements” relating to our future financial performance, the market for our services, our opportunities, and our expected future capital expenditures. In some cases, you can identify forward-looking statements by terminology such as “may,” “will,” “should,” “expect,” “plan,” “anticipate,” “believe,” “estimate,” “predict,” “potential,” or “continue,” the negative of such terms or other comparable terminology. These forward-looking statements reflect our current beliefs, expectations and projections, are based on assumptions, and are subject to known and unknown risks and uncertainties that could cause our actual results or achievements to differ materially from any future results or achievements expressed in or implied by our forward-looking statements. Many of these factors are beyond our ability to control or predict. As a result, you should not place undue reliance on forward-looking statements. Important risks and uncertainties that could cause our actual results or achievements to differ materially from the results or achievements reflected in our forward-looking statements include, but are not limited to: changes, cutbacks or delays in spending by the U.S. Department of War may occur which could cause delays or cancellations of key government contracts; delays to or the cancellation of our projects as a result of protest actions submitted by our competitors; changes in federal government (or other applicable) procurement laws, regulations, policies and budgets; the availability of government funding for the Company’s products and services due to performance, cost growth, or other factors; changes in government and customer priorities and requirements; the potential of the current economic environment to adversely impact our business; currently unforeseen risks associated with any public health crisis; risks related to natural disasters or severe weather; changes in the scope or timing of our projects; the timing, rescheduling or cancellation of significant customer contracts and agreements, or consolidation by or the loss of key customers; risks of adverse regulatory action or litigation; risks related to our international operations; risks associated with debt leverage; failure to successfully achieve our integration, cost reduction or divestiture strategies; risks related to security breaches, cybersecurity attacks or other significant disruptions of our information systems; and competition in the marketplace, which could reduce revenues and profit margins.

Additional significant risks and uncertainties that could cause our actual results or achievements to differ materially from the results or achievements expressed in or implied by our forward-looking statements, include, but are not limited to those specifically addressed in Item 1A “Risk Factors” in this Annual Report, as well as those discussed elsewhere in this Annual Report. These forward-looking statements reflect our views and assumptions only as of the date such forward-looking statements are made. Except as required by law, we assume no responsibility for updating any forward-looking statements, whether as a result of new information, future events or otherwise.