144 0001423809 XXXXXXXX LIVE 0000056047 Kirby Corporation 001-07615 55 Waugh Drive Houston TX 77007 713-435-1135 Amy Husted Officer Stock Bonus and Options Merrill Lynch

800 Capitol St. Houston TX 77002

11667 1508578.28 54200000 02/20/2026 NYSE Stock Options 02/20/2026 Stock Options Kirby Corporation N 8667 02/20/2026 Compensatory payment Stock Bonus 12/12/2023 Stock Bonus Kirby Corporation N 3000 02/20/2026 Compensatory payment Y 02/20/2026 Amy Husted