X0508 4 2025-05-09 0 0001844862 Solid Power, Inc. SLDP 0001317458 Van Scoter John C. 486 S. PIERCE AVE., SUITE E LOUISVILLE CO 80027 1 1 0 0 President & CEO 0 Common Stock 2025-05-09 4 A 0 2816091 0 A 4083700 D Each restricted stock unit represents a contingent right to receive one share of the underlying common stock of the Issuer. The restricted stock units will vest as to 25% of the granted number on May 9, 2026, and the remaining 75% of the granted number will vest in 12 equal quarterly installments commencing on June 30, 2026, and thereafter at the end of each fiscal quarter of the Issuer, subject to the reporting person continuing to be a service provider (as defined in the Solid Power, Inc. 2021 Equity Incentive Plan) through the applicable vesting date. /s/ Kristen Gould, attorney-in-fact on behalf of John C. Van Scoter 2025-05-12