144 0001721923 XXXXXXXX LIVE 0000056047 Kirby Corporation 001-07615 55 Waugh Drive Suite 1000 Houston TX 77007 609-274-2135 William Matthew Woodruff Officer Common Stock Merrill Lynch

800 Capitol St. Houston TX 77002

2000 243766.04 54200000 02/10/2026 NYSE Common Stock 02/03/2023 Stock Bonus Kirby Corporation N 73 02/03/2023 Compensatory payment Common Stock 01/24/2024 Stock Bonus Kirby Corporation N 533 01/24/2024 Compensatrory payment Common Stock 02/03/2024 Stock Bonus Kirby Corporation N 335 02/03/2024 Compensatory payment Common Stock 01/24/2025 Stock Bonus Kirby Corporation N 379 01/24/2025 compensatory payment Common Stock 02/03/2025 Stock Bonus Kirby Corporation N 506 02/03/2025 Compensatory payment Common Stock 01/24/2026 Stock Bonus Kirby Corporation N 227 01/24/2026 Compensatory payment Y 02/09/2026 William Matthew Woodruff