Solid Power, Inc. — Director's Dealing 2025

May 12, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Solid Power, Inc. (SLDP)
CIK: 0001844862
Period of Report: 2025-05-09

Reporting Person: Heller Linda C. (CFO & Treasurer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-05-09	Common Stock	A	1113920	—	Acquired	1986547	Direct

Footnotes

F1: 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.