144 0001769605 XXXXXXXX LIVE 0000056047 Kirby Corporation 001-07615 55 Waugh Drive, Suite 1000 Houston TX 77007 713-435-1135 Raj Kumar Officer Common Stock Merrill Lynch

800 Capitol Street Suite 1900 Houston TX 77002

3000 398009 53646000 03/02/2026 NYSE Common Stock 02/03/2024 Stock Bonus Kirby Corporation N 1719 02/03/2024 Compensatory Payment Common Stock 02/03/2025 Stock Bonus Kirby Corporation N 1281 02/03/2025 Compensatory Payment Y 03/02/2026 Raj Kumar