Form of Proxy

SOLID POWER, INC.

Notes

BD Client Code:

Client Name:

Number of Shares Held in a BD Nominee Company:

No.	Proposition		For	Against	Abstain
1	DIRECTOR Erik Anderson
2	DIRECTOR Kaled Awada
3	DIRECTOR Lesa Roe
4	DIRECTOR John Van Scoter
5	Ratification of the appointment of Deloitte & Touche LLP as Solid Power, Inc.s independent registered public accounting firm for the fiscal year ending December 31, 2025.
6	Approval, by a non-binding advisory vote, of the compensation of Solid Power, Inc.s named executive officers.