Lesa B. Roe - 20 May 2026 Form 4 Insider Report for Solid Power, Inc. (SLDP)

Reporting relationship: Director
Issuer ticker: SLDP
Reported as of: 20 May 2026
Net transaction value: -$104,291
SEC form: 4
Accepted by SEC: 21 May 2026, 17:37:14 UTC
Prior SEC filing: 30 May 2025
Source filing: View source filing
Reporting owner signature: /s/ Kristen Gould, attorney-in-fact on behalf of Lesa B. Roe

Key filing fact

Lesa B. Roe filed Form 4 for Solid Power, Inc. (SLDP) on 21 May 2026.

Key facts

This page summarizes Lesa B. Roe's Form 4 filing for Solid Power, Inc. (SLDP).
2 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 21 May 2026, 17:37.

Change

Previous filing in this sequence was filed on 30 May 2025.
Current net transaction value: -$104,291.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001903970 Primary reporting owner

Roe Lesa B

Relationship: Director
Address: C/O SOLID POWER, INC., 486 S PIERCE AVE, SUITE E, LOUISVILLE
Signature: /s/ Kristen Gould, attorney-in-fact on behalf of Lesa B. Roe
Signature date: 21 May 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

SLDP transaction

Common Stock

Award

Transaction value
Shares: +44,133
Change %: +18%
Price: $0.000000^*
Shares after: 283,182
Date: 20 May 2026
Ownership: Direct
Footnotes: F1

SLDP transaction

Common Stock

Sale

Transaction value: $104,291
Shares: -39,207
Change %: -14%
Price: $2.66
Shares after: 243,975
Date: 20 May 2026
Ownership: Direct
Footnotes: F2

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Rule 10b5-1 trading plan

These transactions were reported as open-market trades under a Rule 10b5-1 plan. The plan lets an insider set trading instructions in advance, which can reduce the risk of trading while in possession of material nonpublic information.

Original filing language: transaction made pursuant to a contract, instruction, or written plan intended to satisfy Rule 10b5-1(c).

Explanation of responses 2 footnotes

Footnote F1

Represents restricted stock units, which upon vesting of the unit, represent the right to receive one share of the issuer's common stock. The restricted stock units vest upon the earlier of: (i) the first anniversary of the grant date or (ii) the day before the issuer's next annual meeting of stockholders following the grant date, in each case, subject to the reporting person continuing to be a service provider (as defined in the Solid Power, Inc. 2021 Equity Incentive Plan) through such vesting date.

Footnote F2

This sale was made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 23, 2025 (the "10b5-1 Plan"). The 10b5-1 Plan was established to cover the reporting person's tax liability arising from vesting of restricted stock units.