144 0001833575 XXXXXXXX LIVE 0001167419 RIOT PLATFORMS, INC. 001-33675 c/o Riot Platforms, Inc. 3855 AMBROSIA STREET, SUITE 301 CASTLE ROCK CO 80109 303-794-2000 Hubert Marleau Director Common Stock Leede Jones Gable Inc.

710 - 1140 West Pender Street Vancouver V6E 4G1 A1 1

51165 628152 185305831 08/17/2023 NASDAQ Common Stock 09/27/2022 Shares acquired pursuant to equity awards made under the Riot Blockchain, Inc. 2019 Equity Incentive Plan Riot Blockchain, Inc. N 51165 09/27/2022 In lieu of services as a director Y 08/18/2023 /s/ Alexander K. Travis, Attorney-in-Fact for Hubert Marleau