Termination of a Material Definitive Agreement. On October 29, 2026, the Digital Asset Custodial Agreement, dated as of November 1, 2023 (the “NYDIG Custodial Agreement” ), between Riot Platforms, Inc. (the “Company” ) and NYDIG Trust Company LLC ( “NYDIG Trust” ), terminated automatically upon completion of the transfer of the Company’s digital assets held by NYDIG Trust to BitGo Bank & Trust, National Association ( “BitGo Bank & Trust” ) as previously disclosed in the Company’s Current Repo…

Results of Operations and Financial Condition. On November 4, 2026, Riot Platforms, Inc. (together with its consolidated subsidiaries, the “Company” ) issued a press release (the “Press Release” ) and an update on the Company’s business and financial results and results of operations for the three months ended September 30, 2026 (the “Q3 2026 Earnings Deck” ) on its website, www.riotplatforms.com, under the “Investor Relations” tab. The full text of the Press Release and the Q3 2026 Earnings…

Entry into a Material Definitive Agreement. On October 7, 2026, Riot Platforms, Inc. (the “ Company ”) entered into a BitGo Custodial Services Agreement (as amended on October 14, 2026, the “ Custody Agreement ”) with BitGo Bank & Trust, National Association (“ BitGo Bank & Trust ”), pursuant to which BitGo Bank & Trust will serve as custodian of the Company’s digital assets and cash. The Company entered into the Custody Agreement in connection with the transfer of its custody relationship fr…

Termination of a Material Definitive Agreement. On September 21, 2026, Riot Platforms, Inc. (the “ Company ”) completed the full voluntary prepayment of all outstanding principal amounts under the Second Amended and Restated Credit Agreement, dated as of April 21, 2026 (the “ Credit Agreement ”), by and between the Company, as borrower, and Coinbase Credit, Inc., as lender, collateral agent, and administrative agent (the “ Lender ”). In connection with such prepayment, all obligations of the…

Entry into a Material Definitive Agreement. On August 10, 2026, Riot DC Logistics, LLC (the “ Borrower ”), a wholly owned subsidiary of Riot Platforms, Inc. (the “ Company ”), entered into a credit agreement (the “ Credit Agreement ”) by and among the Borrower, the several banks and other financial institutions from time to time party thereto as lenders (the “ Lenders ”), and Morgan Stanley Senior Funding, Inc., as administrative agent (in such capacity, the “ Administrative Agent ”). Pursuan…

​ ​ S I G N A T U R E Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. ​ ​ RIOT PLATFORMS, INC. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ By: /s/ Jason Chung ​ ​ Name: Jason Chung ​ ​ Title: Chief Financial Officer ​ ​ Date: August 14, 2026 ​ ​

Results of Operations and Financial Condition. On August 10, 2026, Riot Platforms, Inc. (together with its consolidated subsidiaries, the “ Company ”) issued a press release (the “ Press Release ”) announcing an update on the Company’s business and financial results and results of operations for the three months ended June 30, 2026 . The Company also published on its website , www.riotplatforms.com, under the “Investor Relations” tab a presentation providing, among other things, an update on…

The filing describes an amendment to the equity plan, not a management change.

Results of Operations and Financial Condition. On April 30, 2026, Riot Platforms, Inc. (together with its consolidated subsidiaries, the “ Company ”) issued a press release (the “ Press Release ”) and an update on the Company’s business and financial results and results of operations for the three months ended March 31, 2026 (the “ Q1 2026 Earnings Deck ”) on its website, www.riotplatforms.com, under the “Investor Relations” tab. The full text of the Press Release and the Q1 2026 Earnings Dec…

Entry into a Material Definitive Agreement. On April 21, 2026, Riot Platforms, Inc. (the “ Company ”) entered into a second amended and restated credit agreement (the “ Second Amended and Restated Credit Agreement ”) by and between the Company, as the borrower, and Coinbase Credit, Inc., as lender, collateral agent, and administrative agent (the “ Lender ” and together with the Company, the “ Parties ”). The Second Amended and Restated Credit Agreement replaces in its entirety the existing am…

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. The information set forth in

Results of Operations and Financial Condition . On March 2, 2026, Riot Platforms, Inc. (together with its consolidated subsidiaries, the “ Company ”) issued a press release (the “ Press Release ”) and an update on the Company’s business and financial results and results of operations for the year ended December 31, 2025 (the “ 2025 Earnings Deck ”) on its website, www.riotplatforms.com, under the “Investor Relations” tab. The full text of the Press Release and the 2025 Earnings Deck are attac…

Chief Financial Officer — Colin Yee: Mr. Yee is transitioning out of his role as CFO with a one-time transition bonus.

CFO — Mr. Chung: Mr. Chung was promoted to CFO from his previous role as EVP, Head of Corporate Development & Strategy.

Termination of a Material Definitive Agreement. ​ Effective as of December 30, 2025, the Company terminated the prior sales agreement, dated as of August 9, 2024 (the “ 2024 Sales Agreement ”), with Cantor Fitzgerald & Co., B. Riley Securities, Inc., BTIG, LLC, Roth Capital Partners, LLC, Keefe, Bruyette & Woods, Inc., as successor in interest to Stifel Nicolaus Canada Inc., Compass Point Research & Trading, LLC, Northland Securities, Inc., and ATB Capital Markets USA Inc., a copy of which is…

Entry into a Material Definitive Agreement. ​ On December 30, 2025, Riot Platforms, Inc. (“ Riot ”, the “ Company ”, “ we ”, “ us ”, “ our ”, etc.) entered into a sales agreement, dated as of December 30, 2025 (the “ 2025 Sales Agreement ”), with the sales agents identified therein: B. Riley Securities, Inc., BTIG, LLC, Cantor Fitzgerald & Co., Keefe, Bruyette & Woods, Inc., Macquarie Capital (USA) Inc., Morgan Stanley & Co. LLC, Needham & Company, LLC, Northland Securities, Inc., and Roth Ca…

Results of Operations and Financial Condition . On October 30, 2025, Riot Platforms, Inc. (together with its consolidated subsidiaries, the “ Company ”) issued a press release (the “ Press Release ”) and an update on the Company’s business and financial results and results of operations for the three months ended September 30, 2025 (the “ Q3 2025 Earnings Deck ”) on its website, www.riotplatforms.com, under the “Investor Relations” tab. The full text of the Press Release and the Q3 2025 Earni…

Results of Operations and Financial Condition . On July 31, 2025, Riot Platforms, Inc. (together with its consolidated subsidiaries, the “ Company ”) issued a press release (the “ Press Release ”) and an update on the Company’s business and financial results and results of operations for the three months ended June 30, 2025 (the “ Q2 2025 Earnings Deck ”) on its website, www.riotplatforms.com, under the “Investor Relations” tab. The full text of the Press Release and the Q2 2025 Earnings Deck…

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. ​ The information set forth in

Entry into a Material Definitive Agreement. On May 19, 2025, Riot Platforms, Inc. (the “ Company ”) entered into an amended and restated credit agreement (the “ Amended and Restated Credit Agreement ”) by and between the Company, as the borrower, and Coinbase Credit, Inc., as lender, collateral agent, and administrative agent (the “ Lender ” and together with the Company, the “ Parties ”). The Amended and Restated Credit Agreement replaces in its entirety the Company’s existing credit agreeme…

Entry into a Material Definitive Agreement. On April 28, 2025, Whinstone US, Inc. (together with its affiliates, “ Whinstone ”), a wholly owned subsidiary of Riot Platforms, Inc. (the “ Company ”), entered into a purchase and sale agreement (the “ Agreement ”) to acquire all tangible and certain intangible property of Rhodium Encore LLC (together with its affiliates, the “ Sellers ” and together with Whinstone, the “ Parties ”), located at the Company’s facility in Rockdale, Texas (the “ Faci…

Results of Operations and Financial Condition. ​ On May 1, 2025, the Company issued a press release (the “ Press Release ”) and an update on the Company’s business and financial results and results of operations for the three months ended March 31, 2025 (the “ Q1 2025 Earnings Deck ”) on its website, www.riotplatforms.com, under the “Investor Relations” tab. The full text of the Press Release and the Q1 2025 Earnings Deck are attached to this Current Report on Form 8-K (this “ Report ”) as Ex…

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. ​ The information set forth in

Entry into a Material Definitive Agreement. Credit Agreement On April 22, 2025, Riot Platforms, Inc. (the “ Company ”) entered into a credit agreement (the “ Credit Agreement ”) between the Company, as the borrower, and Coinbase Credit, Inc. (the “ Lender ” and, together with the Company, the “ Parties ”), as lender, collateral agent, and administrative agent. Pursuant to the terms of the Credit Agreement, the Lender shall provide the Company with a multiple drawdown secured term loan facilit…

Other Events . On April 24, 2025, Riot Platforms, Inc. (the “ Company ”) filed a prospectus supplement (the “ Prospectus Supplement ”) to its effective automatic shelf registration statement on Form S-3ASR, as previously filed with the SEC on August 9, 2024 (File No. 333-281454) to register the resale of up to 8,200,000 shares of the Company’s common stock, no par value per share, (the “ Common Stock ”) by Rhodium 2.0 LLC who is the Selling Stockholder identified in the Prospectus Supplement…