BMW Holding B.V. → Solid Power, Inc. SLDPW

Item 4 is hereby amended and supplemented as follows (capitalized terms have the meanings ascribed to them in the Schedule 13D filed by the Reporting Persons on December 20, 2021): As announced in the Company's Current Report on Form 8-K, as filed with the Securities and Exchange Commission on April 24, 2026, on April 20, 2026 Rainer Feurer, an executive within BMW Group, provided notice to the Company of his intention to retire from the Board of Directors effective June 30, 2026. Dr. Feurer's decision to retire and step down from the Board of Directors was not the result of any disagreement on matters relating to the Company's operations, policies or practices. BMW Holding continues to retain its director nomination rights.