Solid Power, Inc. — Regulatory Filings 2026

Apr 24, 2026

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d)

of the Securities Exchange Act of 1934

Date of report (Date of earliest event reported): April 20, 2026

Solid Power, Inc.

(Exact Name of Registrant as Specified in Charter)

Delaware	001-40284	86-1888095
(State or other jurisdiction of incorporation)	(Commission File Number)	(I.R.S. Employer Identification Number)

| 486
S. Pierce Avenue , Suite E Louisville , Colorado | 80027 |
| --- | --- |
| (Address of principal executive offices) | (Zip code) |

( 303 ) 219-0720

(Registrant’s telephone number, including area code)

Not Applicable

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the Registrant under any of the following provisions:

| ¨ | Written
communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) |
| --- | --- |
| ¨ | Soliciting
material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) |
| ¨ | Pre-commencement
communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) |
| ¨ | Pre-commencement
communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) |

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common stock, par value $0.0001 per share	SLDP	The Nasdaq Stock Market LLC
Warrants, each whole warrant exercisable for one share of common stock at an exercise price of $11.50	SLDPW	The Nasdaq Stock Market LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2).

Emerging growth company ¨

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨

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Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

On April 20, 2026, Rainer Feurer provided notice to Solid Power, Inc. (the “Company”) of his intention to retire from the Company’s Board of Directors (the “Board”), effective June 30, 2026. Dr. Feurer’s decision to retire and step down from the Board was not the result of any disagreement on matters relating to the Company’s operations, policies, or practices. The Company is grateful for Dr. Feurer’s valuable contributions to the Board over the past five years and wishes him well.

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SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, hereunto duly authorized.

Dated: April 24, 2026

SOLID POWER, INC.
By:	/s/ Linda Heller
	Name: Linda Heller
	Title: Chief Financial Officer, Treasurer, and Secretary

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