X0508 4 2025-03-03 0000906553 BOYD GAMING CORP BYD 0001664330 Thompson Stephen S. 6465 S. RAINBOW BLVD. LAS VEGAS NV 89118 0 1 0 0 Chief Administrative Officer 0 Common Stock 2025-03-03 4 A 0 12174 0 A 54515 D Common Stock 47125 I By Trust The Reporting Person was awarded 12,174 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 20, 2028. 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. By Stephen S. and Debra L. Thompson Trust dated December 17, 2015. /s/ Uri Clinton, attorney-in-fact for Stephen S. Thompson 2025-03-04