X0508 4 2025-08-18 0000906553 BOYD GAMING CORP BYD 0001186738 BOYD WILLIAM R 6465 S. RAINBOW BLVD. LAS VEGAS NV 89118 1 0 0 0 0 Common Stock 15188 D Common Stock 2025-08-18 4 J 0 300000 0.00 A 1980447 I By Trust Common Stock 41552 I By Trust Transaction reflects the receipt of 300,000 shares of common stock in distribution from BG-00 Limited Partnership. By the William R. Boyd Gaming Properties Trust, of which the reporting person is the trustee, settlor and beneficiary. By the Sean W. Johnson Separate Property Trust, dated 5/9/2019, of which the reporting person is the trustee. * The reporting person expressly disclaims beneficial ownership of any securities of the Issuer except for those securities that are owned directly by the Reporting Person or to the extent of the Reporting Person's pecuniary interest in a trust or other entity which owns such securities. /s/ Uri Clinton, attorney-in-fact for William R. Boyd. 2025-08-20