Riot Platforms, Inc.

Evaluation of Disclosure Controls and Procedures

Our management, with the participation of our Chief Executive Officer (principal executive officer) and our Chief Financial Officer (principal financial officer), has evaluated the effectiveness of our disclosure controls and procedures (as such term is defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act) as of September 30, 2025 to ensure that the information required to be disclosed by the Company in the reports that it files or submits under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in SEC rules and forms, and that information required to be disclosed in the reports we file or submit under the Exchange Act is accumulated and communicated to our management, including our Chief Executive Officer(principal executive officer)and Chief Financial Officer(principal financial officer), to allow timely decisions regarding required disclosures. It should be noted that the design of any system of controls is based in part upon certain assumptions about the likelihood of future events, and there can be no assurance that any design will succeed in achieving its stated goals under all potential future conditions, regardless of how remote.

Based on this evaluation, our management, with the participation of our Chief Executive Officer (principal executive officer) and our Chief Financial Officer (principal financial officer), concluded that our disclosure controls and procedures were effective at the reasonable assurance level as of September 30, 2025.

Changes in Internal Control over Financial Reporting

In July and December 2024, we acquired 100% of the equity interests of Block Mining and E4A Solutions, respectively. We are currently in the process of integrating the Block Mining and E4A Solutions operations, control processes, and information systems into our systems and control environment and expect to include them in scope of design and operation of our internal control over financial reporting for the year ending December 31, 2025. We believe that we have taken the necessary steps to monitor and maintain appropriate internal control over financial reporting during this integration. Other than changes made in connection with the acquisitions of Block Mining and E4A Solutions, there were no changes in our internal control over financial reporting during the quarter ended September 30, 2025 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.