8-K

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):June 30, 2023

SolidPower, Inc.

(Exact Name of Registrant as Specified in Charter)

(303) 219-0720

(Registrant’s telephone number, includingarea code)

Not Applicable

(Former name or former address, if changed sincelast 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:

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

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. ¨

On June 30, 2023, Solid Power Operating, Inc., a wholly owned subsidiary of Solid Power, Inc. (collectively, the “Company”), and Ford Motor Company (“Ford”) entered into a Second Amendment to Joint Development Agreement, dated June 30, 2023 (the “Second Amendment”). The Company and Ford previously entered into a Joint Development Agreement, dated December 28, 2018 (as modified on May 5, 2021, the “JDA”). Pursuant to the terms of the Second Amendment, the Company and Ford agreed to (i) extend the term of the JDA to December 31, 2024 and (ii) revise the schedule for the Company to deliver cells and electrolyte to Ford during the term of the JDA.

The foregoing description of the Second Amendment is qualified in its entirety by the full text of the Second Amendment, a copy of which is filed as Exhibit 10.1 to this Current Report on Form 8-K and incorporated herein by reference.

(d)   Exhibits.

See the Exhibit index below, which is incorporated herein by reference.

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.

Exhibit 10.1

CERTAIN IDENTIFIED INFORMATION HAS BEEN EXCLUDEDFROM THE EXHIBIT BECAUSE IT IS BOTH (I) NOT MATERIAL AND (II) THE TYPE THAT THE REGISTRANT TREATS AS PRIVATE OR CONFIDENTIAL.[***] INDICATES THAT INFORMATION HAS BEEN REDACTED.

Second Amendment to Joint Development Agreement

This Amendment (“Second Amendment”) to the Joint Development Agreement effective December 28, 2018 (“JDA”) and modified by the Series B Preferred Stock Financing Letter dated May 5, 2021 (“Financing Letter”), is by and between Ford Motor Company, located at One American Road, Dearborn, MI 48126 (“Ford”) and Solid Power Operating, Inc., located at 486 S. Pierce Avenue, Suite E, Louisville, CO 80027 (“Solid Power”). Ford and Solid Power may be referred to individually as a “Party” or collectively as the “Parties,” as the context requires. This Second Amendment is effective as of the date of the last party to sign.

RECITALS

WHEREAS, the initial termination date of the JDA was December 31, 2020; and

WHEREAS, the JDA termination date was extended to June 30, 2023, in the last sentence of Section 1 of the Financing Letter; and

WHEREAS, the Parties would like to further extend the JDA termination date to December 31, 2024; and

WHEREAS, the Parties have discussed and agreed on a schedule for certain cell deliverables by Solid Power during the extended period of the JDA, and

WHEREAS, the Parties now seek to amend the JDA in accordance with these objectives.

NOW,THEREFORE, BE IT RESOLVED that:

[* * *]

IN WITNESS WHEREOF, the Parties hereto have caused this Second Amendment to be executed by their duly authorized representatives: