144 0001512157 XXXXXXXX LIVE 0001336920 Leidos Holdings, Inc. 001-33072 1750 PRESIDENTS STREET RESTON VA 20190 571-526-6000 Kovarik Robert C JR Director Former Director Common Stock Citigroup Global Markets, Inc.

390 Greenwich St. New York NY 10013

2486 384668.59 128718872 05/08/2025 NYSE Common Stock 04/26/2024 Restricted Stock Vesting Leidos N 1574 05/08/2025 Services Rendered Common Stock 05/05/2025 Restricted Stock Vesting Leidos N 912 05/08/2025 Services Rendered N Robert C Kovarik Jr

1750 Presidents Street Reston VA 20190

Common Stock 02/13/2025 1511 203322.12 05/08/2025 Conformed Signature on File