X0306 4 2021-03-15 0 0001069258 KRATOS DEFENSE & SECURITY SOLUTIONS, INC. KTOS 0001342017 Rock Stacey G 10680 TREENA STREET, SUITE 600 SAN DIEGO CA 92131 0 1 0 0 President, KTT Division Common Stock 2021-03-15 4 F 0 2201 25.09 D 30377 D Shares withheld in a net transaction to satisfy the minimum tax liability, in accordance with Issuer's trading policies, in connection with shares vested March 4, 2021 from performance restricted stock units granted in 2018 as reported on a Form 4 filed March 8, 2021 and released March 15, 2021. Includes approximately 10,312 shares held through Issuer's 401(k) Plan. Stacey G. Rock, by Eva Yee, Attorney-In-Fact 2021-03-17