X0306 4 2018-02-22 0 0000056047 KIRBY CORP KEX 0001483620 Grzebinski David W 55 WAUGH DRIVE, SUITE 1000 HOUSTON TX 77007 1 1 0 0 President & CEO Restricted Stock Units 2018-02-22 4 A 0 16320 0 A Common Stock 16320 16320 D Employee Stock Option (Right to Buy) 75.5 2018-02-22 4 A 0 26358 0 A 2021-02-22 2025-02-22 Common Stock 26358 26358 D Each restricted stock unit represents a contingent right to receive cash or one share of common stock of the issuer. The restricted stock units vest in five equal annual installments beginning 1/24/19. 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 after the vesting dates. Option is exercisable 33% after one year, 67% after two years and 100% after three years from date of grant. Ronald A. Dragg, Agent and Attorney-in-Fact 2018-02-26