144 0002002273 XXXXXXXX LIVE 0001336920 Leidos Holdings, Inc. 001-33072 1750 PRESIDENTS STREET RESTON VA 20190 571-526-6000 Hull Stephen Edward Sector President Common Stock Citigroup Global Markets, Inc.

390 Greenwich St New York NY 10013

12497 2227590.00 128297332 09/04/2025 NYSE Common Stock 09/04/2025 Restricted Stock Vesting/Stock Option Exercise Leidos N 12497 09/04/2025 Cash/Services Rendered N Stephen Hull

1750 Presidents Street Reston VA 20190

Common Stock 08/08/2025 7526 1327477.00 Stephen Hull

1750 Presidents Street Reston VA 20190

Common Stock 08/20/2025 12890 2297945.00 Stock exercise was cashless exercise placed for 2,827 options where taxes were held for obligation 09/04/2025 Conformed Signature On File