X0306 4 2020-01-24 0 0000056047 KIRBY CORP KEX 0001323199 Clarke Kim B 55 WAUGH DR., SUITE 1000 HOUSTON TX 77007 0 1 0 0 VP and Chief HR Officer Common Stock, par value $.10 per share 2020-01-24 4 M 0 1894 0 A 3295 D Common Stock, par value $.10 per share 2020-01-24 4 F 0 500 83.66 D 2795 D Common Stock, par value $.10 per share 2020-01-24 4 F 0 139 83.66 D 2656 D Common Stock, par value $.10 per share 66 I 401(k) Restricted Stock Units 2020-01-24 4 M 0 707 0 D Common Stock 707 2121 D Restricted Stock Units 2020-01-24 4 M 0 1187 0 D Common Stock 1187 4748 D Each restricted stock unit represents a contingent right to receive cash or one share of common stock of the issuer. Acquired 23 shares during 2019 pursuant to the Kirby Corporation 401(k) plan. The information reported herein is based on a plan statement dated December 31, 2019. 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. Ronald A. Dragg, Agent and Attorney-in-Fact 2020-01-28