144 0001548929 XXXXXXXX LIVE 0000056047 Kirby Corporation 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 1646793.54 53500000 05/15/2026 NYSE Common Stock 02/03/2025 Stock Bonus Kirby Corporation N 3548 02/03/2026 Compensatory Payment Common Stock 01/24/2026 Stock Bonus Kirby Corporation N 1562 01/24/2026 Compensatory Payment Common Stock 02/03/2026 Stock Bonus Kirby Corporation N 6177 02/03/2026 Compensatory Payment N Merrill Lynch 800 Capitol Street Suite 1900 Houston TX 77002 Common Stock 03/02/2026 11287 1493343.57 05/15/2026 Christian O'Neil