克瑞拓斯安全防卫美股招股说明书(2026-02-12版)

This prospectus supplement supplements information contained in that certain prospectus dated February 21, 2024 filed as part ofthat certain registration statement on Form S-3 filed with the U.S. Securities and Exchange Commission (the “SEC”) on February 21,2024 and relates to the offer and sale from time to time by the selling stockholders named herein of up to 972,136 shares of thecommon stock, par value $0.001 per share (the “common stock”), of Kratos Defense & Security Solutions, Inc. (the “Company”). We Our registration of the shares of common stock covered by this prospectus supplement does not mean that the selling stockholderswill offer or sell any of the shares. The selling stockholders may offer and sell or otherwise dispose of the shares of common stockdescribed in this prospectus supplement from time to time through public or private transactions at prevailing market prices, at prices We will not receive any of the proceeds from the sale of shares of common stock by the selling stockholders. The sellingstockholders will pay all underwriting discounts and selling commissions, if any, in connection with the sale of the shares of commonstock. We have agreed to pay certain expenses in connection with this prospectus supplement. As of the date of this prospectus You should read this prospectus supplement, any subsequent, applicable prospectus supplement and any related free writingprospectus carefully before you invest. Our common stock is listed on The Nasdaq Global Select Market under the symbol “KTOS.” On February 11, 2026, the lastreported sale price of our common stock on The Nasdaq Global Select Market was $87.78. Investing in our securities involves variousrisks and uncertainties. You should carefully review the risks and uncertainties described under the heading “Risk Factors” beginning Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved ofthese securities or determined if this prospectus supplement is truthful or complete. Any representation to the contrary is acriminal offense. The date of this prospectus supplement is February 12, 2026. Prospectus Supplement ABOUT THIS PROSPECTUS SUPPLEMENTTRADEMARKS, SERVICE MARKS AND TRADENAMESMARKET AND INDUSTRY DATAPROSPECTUS SUPPLEMENT SUMMARYRISK FACTORSSPECIAL NOTE REGARDING FORWARD-LOOKING INFORMATIONUSE OF PROCEEDSDIVIDEND POLICYTHE SELLING STOCKHOLDERSPLAN OF DISTRIBUTIONMATERIAL U.S. FEDERAL INCOME TAX CONSEQUENCES TO NON-U.S. HOLDERSCERTAIN ERISA CONSIDERATIONSVALIDITY OF SECURITIESEXPERTS Prospectus ABOUT THIS PROSPECTUSSUMMARYRISK FACTORSFORWARD-LOOKING STATEMENTS ABOUT THIS PROSPECTUS SUPPLEMENT This prospectus supplement and the accompanying prospectus are part of an automatic shelf registration statement that we filedwith the Securities and Exchange Commission (“SEC”), as a “well-known seasoned issuer” as defined in Rule 405 under theSecurities Act of 1933, as amended (the “Securities Act”), utilizing a “shelf” registration process. This document is in two parts. Thefirst part is this prospectus supplement, including the documents incorporated by reference, which describes the specific terms of thisoffering. The second part, the accompanying prospectus, including the documents incorporated by reference, provides more generalinformation. Generally, when we refer to this prospectus, we are referring to both parts of this document combined. We urge you tocarefully read this prospectus supplement and the accompanying prospectus, and the documents incorporated by reference herein and You should rely only on the information contained in this prospectus supplement and the accompanying prospectus, orincorporated by reference herein or therein. We have not authorized anyone to provide you with different information. Nounderwriter, dealer, salesperson or other person, including us, has authorized anyone to give you any information or torepresent anything not contained in this prospectus supplement and the accompanying prospectus. You should not rely on anyunauthorized information or representation. We do not take any responsibility for, and cannot provide any assurance as to thereliability of, any information other than the information contained in this prospectus supplement and the accompanyingprospectus, or incorporated herein or therein. This prospectus supplement is an offer to sell only the securities offered hereby Unless otherwise mentioned or unless the context requires otherwise, all references in this prospectus to “the Company,” “we,”“us,” “our” and “Kratos” refer to Kratos Defense & Security Solutions, Inc., a Delaware corporation, and its consolidated subsidiaries. TRADEMARKS, SERVICE MARKS AND TRADENAMES We own or have rights to trademarks, service marks or trade names that we use in connection with the operation of our business.We also own or have the rights to copyrights that protect the content of our products. Solely for convenience, the trademarks, servicem