144 0001548929 XXXXXXXX LIVE 0000056047 Kirby Corporation 001-07615 55 Waugh Drive, Suite 1000 Houston TX 77007 832-291-7254 Christian O'Neil Officer Common Stock Merrill Lynch

800 Capitol Street Suite 1900 Houston TX 77002

11287 1493949.57 53646000 03/02/2026 NYSE Common Stock 01/24/2021 Stock Bonus Kirby Corporation N 1270 01/24/2021 Compensatory Payment Common Stock 01/24/2022 Stock Bonus Kirby Corporation N 2317 01/24/2022 Compensatory Payment Common Stock 01/05/2023 Stock Bonus Kirby Corporation N 891 01/05/2023 Compensatory Payment Common Stock 02/03/2024 Stock Bonus Kirby Corporation N 3268 02/03/2024 Compensatory Payment Common Stock 01/24/2025 Stock Bonus Kirby Corporation N 2301 01/24/2025 Compensatory Payment Common Stock 02/03/2025 Stock Bonus Kirby Corporation N 1240 02/03/2025 Compensatory Payment N Merrill Lynch

800 Capitol Street Suite 1900 Houston TX 77002

Common Stock 12/23/2025 11145 1244389.36 03/02/2026 Christian O'Neil