X0407 4 2023-05-04 0000906553 BOYD GAMING CORP BYD 0001463238 SPADAFOR CHRISTINE J. 6465 S. RAINBOW BLVD. LAS VEGAS NV 89118 1 0 0 0 0 Common Stock 2023-05-04 4 A 0 2942 0 A 2942 D Common Stock 4947 I By Trust The Restricted Stock Units ("RSUs") were granted to the Reporting Person for no consideration under Issuer's 2020 Stock Incentive Plan. The RSUs fully vested, and one share of Issuer common stock was issued for each RSU, on the date of grant. By 2012 Trust UAD 6/1/12, Christine J. Spadafor, Trustee. /s/ Scott Lesmes, as Attorney-in-Fact for Christine J. Spadafor 2023-05-18