144 0001186757 XXXXXXXX LIVE 0000906553 Boyd Gaming Corporation 001-12882 6465 S Rainbow Blvd Las Vegas NV 89118 7027927200 Keith Smith Officer Director Common UBS Financial Services Inc

1000 Harbor Blvd 3rd Floor Weehawken NJ 07086

100000 8247000 74330156 06/03/2026 NYSE Common 12/05/2021 RSU Boyd Gaming Corporation N 38852 12/05/2021 cash Common 12/16/2024 RSU Boyd Gaming Corporation N 27542 12/16/2024 Cash Common 02/21/2025 PSU Boyd Gaming Corporation N 33606 02/21/2025 Cash Y Keith Smith is an Officer at Boyd (BYD), MQuinn Living Trust DTD 03/25/2019 Keith & Jeanne Smith TTEEs is the seller 06/03/2026 /s/Mijo Suric, for UBS Financial Services Inc, as attorney-in-fact for Keith Smith