Results of Operations and Financial Condition. On August 4, 2026, Solid Power, Inc. (the “Company,” “Solid Power,” “we,” or “our”) issued a press release announcing its financial and operational results for the second quarter ended June 30, 2026. A copy of the press release is furnished with this report as Exhibit 99.1. Such exhibit and the information set forth therein will not be deemed to be filed for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange…

Class III director — Uwe Breitweg: Appointment of Uwe Breitweg as a Class III director to succeed Rainer Feurer.

Results of Operations and Financial Condition. On May 5, 2026, Solid Power, Inc. (the “Company,” “Solid Power,” “we,” or “our”) issued a press release announcing its financial and operational results for the first quarter ended March 31, 2026. A copy of the press release is furnished with this report as Exhibit 99.1. Such exhibit and the information set forth therein will not be deemed to be filed for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act…

Director — Rainer Feurer: Dr. Rainer Feurer intends to retire from the Board of Directors effective June 30, 2026.

Entry into a Material Definitive Agreement. On March 5, 2026, Solid Power Operating, Inc., a wholly owned subsidiary of Solid Power, Inc. (collectively, the “Company,” “Solid Power,” “we,” or “our”), and the United States Department of Energy (the “DOE”) entered into an amended and restated Assistance Agreement (the “Amended Agreement”), with an effective date of January 1, 2026. The Company and the DOE previously entered into an Assistance Agreement, with an effective date of January 1, 2025…

Results of Operations and Financial Condition. On February 24, 2026, Solid Power, Inc. (the “Company,” “Solid Power,” “we,” or “our”) issued a press release announcing its financial and operational results for the fourth quarter and full year ended December 31, 2025. A copy of the press release is furnished with this report as Exhibit 99.1. Such exhibit and the information set forth therein will not be deemed to be filed for purposes of Section 18 of the Securities Exchange Act of 1934, as am…

The filing details changes to the company's severance and change in control plans, which are not directly related to a management departure or promotion.

Results of Operations and Financial Condition. On November 4, 2025, Solid Power, Inc. (the “Company,” “Solid Power,” “we,” or “our”) issued a press release announcing its financial and operational results for the third quarter ended September 30, 2025. A copy of the press release is furnished with this report as Exhibit 99.1. Such exhibit and the information set forth therein will not be deemed to be filed for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exc…

Entry into a Material Definitive Agreement. On October 27, 2025, Solid Power Operating, Inc., a wholly owned subsidiary of Solid Power, Inc. (collectively, the “Company”), BMW AG (“BMW”), and Samsung SDI Co., Ltd. (“Samsung SDI”) entered into a Joint Evaluation Agreement (the “Joint Evaluation Agreement”). Pursuant to the terms of the Joint Evaluation Agreement, the Company agreed to provide electrolyte to Samsung SDI, which Samsung SDI will use to fabricate separator and/or catholyte and bui…

Other Events. On September 5, 2025, Solid Power, Inc. (the “Company”) entered into an Equity Distribution Agreement (the “Distribution Agreement”) with Oppenheimer & Co. Inc., serving as agent (“Oppenheimer”), with respect to an at-the-market offering program under which the Company may offer and sell, from time to time, shares of its common stock, par value $0.0001 per share (the “Common Stock”), having an aggregate offering price of up to $150.0 million (the “Shares”) through Oppenheimer (t…

Results of Operations and Financial Condition. On August 6, 2025, Solid Power, Inc. (the “Company,” “Solid Power,” “we,” or “our”) issued a press release announcing its financial and operational results for the second quarter ended June 30, 2025. A copy of the press release is furnished with this report as Exhibit 99.1. Such exhibit and the information set forth therein will not be deemed to be filed for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange…

Entry into a Material Definitive Agreement. On May 26, 2025, Solid Power Operating, Inc., a wholly owned subsidiary of Solid Power, Inc. (collectively, the “Company”), and the United States Department of Energy (the “DOE”) entered into an Amendment to Assistance Agreement Award No. DE-MS0000122 (the “Amendment”), with an effective date of May 15, 2025. The Company and the DOE previously entered into an Assistance Agreement, with an effective date of January 1, 2025. The Amendment provides tha…

Results of Operations and Financial Condition. On May 6, 2025, Solid Power, Inc. (the “Company,” “Solid Power,” “we,” or “our”) issued a press release announcing its financial and operational results for the first quarter ended March 31, 2025. A copy of the press release is furnished with this report as Exhibit 99.1. Such exhibit and the information set forth therein will not be deemed to be filed for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act…

Changes in Registrant’s Certifying Accountant. (a) Dismissal of Previous Independent Registered Public Accounting Firm On March 7, 2025, the Audit Committee (the “Audit Committee”) of the Board of Directors of Solid Power, Inc. (the “Company”) dismissed Ernst & Young LLP (“EY”) as the Company’s independent registered public accounting firm. The reports of EY on the consolidated financial statements of the Company as of and for the fiscal years ended December 31, 2024 and 2023 did not contain…

Results of Operations and Financial Condition. On February 27, 2025, Solid Power, Inc. (the “Company,” “Solid Power,” “we,” or “our”) issued a press release announcing its financial and operational results for the fourth quarter and full year ended December 31, 2024. A copy of the press release is furnished with this report as Exhibit 99.1. Such exhibit and the information set forth therein will not be deemed to be filed for purposes of Section 18 of the Securities Exchange Act of 1934, as am…

Entry into a Material Definitive Agreement. On January 21, 2025, Solid Power Operating, Inc., a wholly owned subsidiary of Solid Power, Inc. (collectively, the “Company”), and the United States Department of Energy (the “DOE”) entered into an Assistance Agreement (the “Assistance Agreement”), with an effective date of January 1, 2025. The Assistance Agreement provides that the DOE will provide the Company with funding of up to $50 million for the Company’s installation of equipment necessary…

Chief Operating Officer — Derek Johnson: Derek Johnson resigned from his position as Chief Operating Officer with a consulting agreement for transition services.

Entry into a Material Definitive Agreement. On December 16, 2024, Solid Power Operating, Inc., a wholly owned subsidiary of Solid Power, Inc. (collectively, the “Company”), and Ford Motor Company (“Ford”) entered into a Third Amendment to Joint Development Agreement (the “Third Amendment”). The Company and Ford previously entered into a Joint Development Agreement, dated December 28, 2018 (as modified on May 5, 2021 and June 30, 2023, the “JDA”). Pursuant to the terms of the Third Amendment,…

Results of Operations and Financial Condition. On November 7, 2024, Solid Power, Inc. (the “ Company ,” “ Solid Power ,” “ we ,” or “ our ”) issued a press release announcing its financial and operational results for the third quarter ended September 30, 2024. A copy of the press release is furnished with this report as Exhibit 99.1. Such exhibit and the information set forth therein will not be deemed to be filed for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (…

Entry into a Material Definitive Agreement. On September 30, 2024, Solid Power Operating, Inc., a wholly owned subsidiary of Solid Power, Inc. (collectively, the “Company”), and BMW of North America, LLC (“BMW”) entered into Amendment No. 6 to Joint Development Agreement (“Amendment No. 6”). The Company and BMW previously entered into a Joint Development Agreement, dated July 1, 2017 (as amended, the “JDA”). Pursuant to the terms of Amendment No. 6, the Company and BMW agreed to (i) extend th…

Entry into a Material Definitive Agreement. On August 20, 2024, Solid Power Operating, Inc., a wholly owned subsidiary of Solid Power, Inc. (collectively, the “Company”), and Red Pierce, LLC (the “Landlord”) entered into a Third Amendment to Lease (the “Third Amendment”). The Company and Landlord previously entered into a Lease Agreement, dated November 29, 2016 (as previously amended, the “Original Lease” and, as amended by the Third Amendment, the “Master Lease”). Under the Third Amendment,…

Results of Operations and Financial Condition. On August 6, 2024, Solid Power, Inc. (the “ Company ,” “ Solid Power ,” “ we ,” or “ our ”) issued a press release announcing its financial and operational results for the second quarter ended June 30, 2024. A copy of the press release is furnished with this report as Exhibit 99.1. Such exhibit and the information set forth therein will not be deemed to be filed for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “…

Entry into a Material Definitive Agreement. On June 21, 2024, Solid Power Operating, Inc., a wholly owned subsidiary of Solid Power, Inc. (collectively, the “Company”), and BMW of North America, LLC (“BMW”) entered into Amendment No. 5 to Joint Development Agreement, dated June 21, 2024 (“Amendment No. 5”). The Company and BMW previously entered into a Joint Development Agreement, dated July 1, 2017 (as amended, the “JDA”). Pursuant to the terms of Amendment No. 5, the Company and BMW agreed…

Chief Financial Officer and Treasurer — Linda Heller: Linda Heller was appointed as the Chief Financial Officer and Treasurer of Solid Power, Inc.

Results of Operations and Financial Condition. On May 7, 2024, Solid Power, Inc. (the “ Company ,” “ Solid Power ,” “ we ,” or “ our ”) issued a press release announcing its financial and operational results for the first quarter ended March 31, 2024. A copy of the press release is furnished with this report as Exhibit 99.1. Such exhibit and the information set forth therein will not be deemed to be filed for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “ Exc…