144 0001216858 XXXXXXXX LIVE 0001336920 Leidos Holdings, Inc. 001-33072 1750 Presidents Street Reston VA 20190 571-526-6000 Noel B. Geer Director Common Stock Robert W. Baird & Co.

1600 West End Avenue Suite 1100 Nashville TN 37203

10000 1390800.00 125492209 08/11/2026 NYSE Common Stock 03/04/2026 Acquired as compensation - restricted stock units Leidos Holdings, Inc. N 2123 03/04/2026 Compensation Common Stock 03/04/2026 Acquired as compensation - restricted stock units Leidos Holdings, Inc. N 1769 03/04/2026 Compensation Common Stock 03/04/2026 Acquired as compensation - restricted stock units Leidos Holdings, Inc. N 2296 03/04/2026 Compensation Common Stock 05/01/2026 Acquired as compensation - restricted stock units Leidos Holdings, Inc. N 873 05/01/2026 Compensation Common Stock 08/27/2025 Acquired as compensation - restricted stock units Leidos Holdings, Inc. N 2939 08/27/2025 Compensation Y Trades executed under the Noel B. Geer Living Trust 08/11/2026 /s/ Noel B. Geer