RIOTRiot Platforms

On August 17, 2026, Stephen Howell, the Company’s Chief Operating Officer, adopted a Rule 10b5-1 trading arrangement intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Exchange Act. The trading arrangement provides for the sale of up to 887,942 shares of our common stock, which includes shares issuable upon the future vesting of equity awards (with the actual number of such shares to be sold reduced by shares withheld to satisfy tax withholding obligations), and will remain in effect until the earlier of February 1, 2028 and the date on which all transactions under the arrangement are completed.

On December 2, 2025, Ryan Werner, the Company’s Chief Accounting Officer, adopted a 10b5-1 Plan providing for the potential sale of up to 469,434 shares of the Company’s common stock, subject to sales occurring only when the market price of our common stock is greater than certain minimum threshold prices during the period beginning on the first potential sale date of March 3, 2026 and ending on the scheduled expiration date of the 10b5-1 Plan on February 16, 2027 .

On September 4, 2025, Colin Yee, Chief Financial Officer of the Company, entered into a 10b5-1 Plan providing for the potential sale of up to 48,577 shares of our common stock. The first sale date shall be April 1, 2026, and the 10b5-1 Plan shall remain in effect until the earlier of the scheduled expiration date of April 1, 2027, or such time as the 10b5-1 Plan is otherwise terminated according to its terms. ​

On August 25, 2025, Jason Les, Chief Executive Officer of the Company, entered into a 10b5-1 Plan providing for the potential sale of up to 1,050,000 shares of our common stock, subject to sales only when the market price of our common stock is higher than certain minimum threshold prices between the first potential sale date of December 1, 2025 and the scheduled expiration date of the 10b5-1 Plan of November 2, 2026.

On December 13, 2024 , Ryan Werner , Chief Accounting Officer of the Company, entered into a 10b5-1 Plan providing for the potential sale of up to 101,484 shares of our common stock so long as the market price of our common stock is higher than certain minimum threshold prices between the first potential sale date of July 7, 2025 and the scheduled expiration date of the 10b5-1 Plan of December 6, 2025 .

On September 10, 2024, Jason Les, Chief Executive Officer and director of the Company, entered into a 10b5-1 Plan providing for the potential sale of up to 1,050,000 shares of our common stock through the scheduled expiration date of the 10b5-1 Plan on October 31, 2025.

Effective August 31, 2023, the Rule 10b5-1 sales plan of our director, Lance D’Ambrosio, terminated at its plan end date in accordance with the terms of the plan. Mr. D’Ambrosio’s Rule 10b5-1 sales plan became effective October 31, 2022, and instructed for the sale of vested shares of Riot stock in four equal tranches of 26,000 shares, quarterly, through the plan end date.