X0508 4 2024-02-28 0000906553 BOYD GAMING CORP BYD 0001186757 SMITH KEITH 6465 S. RAINBOW BLVD. LAS VEGAS NV 89118 1 1 0 0 President and CEO 0 Common Stock 2024-02-28 4 A 0 92476 0 A 1187101 D Common Stock 2024-02-28 4 F 0 36388 63.96 D 1150713 D Common Stock 2024-02-28 4 A 0 50489 0 A 1201202 D Common Stock 325 I By Spouse Represents shares underlying Performance Share Units that vested on February 28, 2024. The Reporting Person was awarded 50,489 Restricted Stock Units for no consideration pursuant to the Issuer's 2020 Stock Incentive Plan. Each Restricted Stock Unit represents a contingent right to receive one share of Issuer common stock upon vesting. The Restricted Stock Units will vest in full on February 28, 2027. The Restricted Stock Units are subject to the forfeiture and other terms and conditions contained in the award agreement and the 2020 Stock Incentive Plan. /s/ Uri Clinton, attorney-in-fact for Keith Smith 2024-03-01