144 0001846283 XXXXXXXX LIVE 0001167419 RIOT PLATFORMS, INC. 001-33675 c/o Riot Platforms, Inc. 3855 AMBROSIA STREET, STE. 301 CASTLE ROCK CO 80109 303-794-2000 Hannah Cho Director Common Stock Fidelity Brokerage Services LLC, Member NYSE, SPIC

900 Salem Street Smithfield RI 02917

14000 171528.25 68150 05/30/2023 NASDAQ Common Stock 02/17/2021 Shares acquired pursuant to equity awards made under the Riot Blockchain, Inc. 2019 Equity Incentive Plan Riot Blockchain, Inc. N 6250 02/17/2021 Not Applicable - No payment Common Stock 01/10/2022 Shares acquired pursuant to equity awards made under the Riot Blockchain, Inc. 2019 Equity Incentive Plan Riot Blockchain, Inc. N 6249 01/10/2022 Not Applicable - No payment 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 1501 09/27/2022 Not Applicable - No payment Y 05/31/2023 /s/ Hannah Cho