Form 4 Filing by Stacey G. Rock

On May 28, 2026, Stacey G. Rock, President of the KTT Division at KRATOS DEFENSE & SECURITY SOLUTIONS, INC. (KTOS), reported the sale of 4,000 shares of common stock under a 10b5-1 trading plan. The sales occurred in multiple transactions with an average price of $65.09 per share, ranging from $62.94 to $66.79. Following these transactions, Mr. Rock holds 13,896 shares, which includes 2,013 shares from the Employee Stock Purchase Plan and approximately 6,990 shares held in his 401(k) Plan. The filing was signed by Eva Yee, Attorney-In-Fact, on May 29, 2026.