X0306 4 2022-01-24 0 0000056047 KIRBY CORP KEX 0001488058 Reniers Joseph H. 55 WAUGH DRIVE SUITE 1000 HOUSTON TX 77007 0 1 0 0 President-Kirby Distribution Common Stock, par value $0.10 per share 2022-01-24 4 M 0 6431 0.00 A 21136 D Common Stock, par value $0.10 per share 2022-01-24 4 F 0 370 63.04 D 20766 D Common Stock, par value $0.10 per share 2022-01-24 4 F 0 2588 63.04 D 18178 D Restricted Stock Units 2022-01-24 4 M 0 1325 0.00 D Common Stock 1325 1325 D Restricted Stock Units 2022-01-24 4 M 0 1218 0.00 D Common Stock 1218 2436 D Restricted Stock Units 2022-01-24 4 M 0 1228 0.00 D Common Stock 1228 3684 D Restricted Stock Units 2022-01-24 4 M 0 2660 0.00 D Common Stock 2660 10640 D Each restricted stock unit represents a contingent right to receive cash or one share of common stock of the issuer. These restricted stock units granted on February 22, 2018, vest in five equal annual installments beginning on January 24, 2019. Cash or shares of common stock of the issuer, at the election of the issuer, will be delivered to the reporting person on or as soon as practicable on each vesting date. These restricted stock units granted on February 1, 2019, vest in five equal annual installments beginning on January 24, 2020. Cash or shares of common stock of the issuer, at the election of the issuer, will be delivered to the reporting person on or as soon as practicable on each vesting date. These restricted stock units granted on January 31, 2020, vest in five equal annual installments beginning on January 24, 2021. Cash or shares of common stock of the issuer, at the election of the issuer, will be delivered to the reporting person on or as soon as practicable on each vesting date. These restricted stock units granted on January 29, 2021, vest in five equal annual installments beginning on January 24, 2022. Cash or shares of common stock of the issuer, at the election of the issuer, will be delivered to the reporting person on or as soon as practicable on each vesting date. Ronald A. Dragg, Agent and Attorney-in-Fact 2022-01-26