144 0001721702 XXXXXXXX LIVE 0001167419 Riot Platforms, Inc. 001-33675 3855 Ambrosia Street, Suite 301 Castle Rock CO 80109 303-794-2000 Jason Les CEO Director Common J.P. Morgan Securities LLC

390 Madison Avenue - 6th Floor New York NY 10017

100000 1386000 357263742 07/21/2025 Nasdaq Common Stock 02/17/2022 Transfer Jason Les, who acquired from Issuer on 02/17/22. N 58059 02/17/2022 N/A Common Stock 07/10/2023 Transfer Jason Les, who acquired from Issuer on 12/11/23. N 8044 07/10/2023 N/A Common Stock 06/01/2023 Transfer Jason Les, who acquired from Issuer on 07/12/2023. N 33897 06/01/2023 N/A Y The shares filed today will be sold by the Jason M. Les Trust, Jason Les as Trustee 07/21/2025 09/10/2024 /s/ J.P. Morgan Securities LLC as agent and attorney-in-fact for Jason Les