Solid Power (SLDP) director Uwe Breitweg files initial Form 3

Rhea-AI Filing Summary

Solid Power, Inc. director Uwe Michael Breitweg filed an initial Form 3, which is a required report of insider status and holdings. This filing does not list any buy, sell, or derivative transactions, indicating only that he is now a reporting person as a director of the company.

Key Figures

Buy transactions reported: 0 Sell transactions reported: 0 Derivative transactions reported: 0 +2 more

5 metrics

Buy transactions reported 0 Form 3 transactionSummary buyCount

Sell transactions reported 0 Form 3 transactionSummary sellCount

Derivative transactions reported 0 Form 3 transactionSummary derivativeTransactionCount

Exercise transactions reported 0 Form 3 transactionSummary exerciseCount

Gift transactions reported 0 Form 3 transactionSummary giftCount

Key Terms

Form 3, reportingPersons, transactionSummary, derivativeSummary

4 terms

Form 3 regulatory

"INSIDER FILING DATA (Form 3): {"

Form 3 is the initial public filing that officers, directors and large shareholders must submit to report their ownership of a company’s securities when they become insiders. It acts like an opening inventory sheet that gives investors a starting point to see who holds significant stakes and to spot later trades or potential conflicts of interest, helping assess insider confidence and transparency.

reportingPersons regulatory

""reportingPersons": [ { "name": "Breitweg Uwe Michael""

transactionSummary financial

""transactionSummary": { "buyCount": 0, "sellCount": 0"

derivativeSummary financial

""derivativeSummary": [],"

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Available on EDGAR 07/06/2026 - 04:46 PM Accepted by SEC EDGAR 07/06/2026 - 04:46 PM Learn about SEC filing dates

FAQ

What does the Solid Power (SLDP) Form 3 filing for Uwe Michael Breitweg show?

The Form 3 shows that Uwe Michael Breitweg is a director of Solid Power and has become a reporting person. The filing lists no insider transactions or derivative positions, serving purely as an initial insider status disclosure.

Did Uwe Michael Breitweg buy or sell SLDP shares in this Form 3?

No transactions are reported in this Form 3 for Uwe Michael Breitweg. The transaction summary shows zero buys, zero sells, and no derivative exercises, indicating the filing is administrative rather than a record of trading activity.

Does the Solid Power (SLDP) Form 3 include any derivative securities activity?

The Form 3 includes no derivative securities activity for Uwe Michael Breitweg. The derivative summary is empty and the transaction summary reports zero derivative transactions or exercises, so there is no options or similar activity disclosed here.

What role does Uwe Michael Breitweg have at Solid Power (SLDP) in this filing?

The filing identifies Uwe Michael Breitweg as a director of Solid Power, Inc. He is not listed as an officer or ten percent owner, and this status makes him a reporting person subject to ongoing insider reporting requirements.

Is the Solid Power (SLDP) Form 3 filing a trading signal for investors?

This Form 3 is mainly an administrative disclosure that Uwe Michael Breitweg is now a reporting director. With zero reported transactions and no derivative positions listed, it does not provide a trading signal about his views on Solid Power’s stock.

SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0104
Estimated average burden
hours per response:			0.5

1. Name and Address of Reporting Person^*

Breitweg Uwe Michael

(Last) (First) (Middle)

C/O SOLID POWER, INC.

486 S PIERCE AVE, STE E

(Street)

LOUISVILLE COLORADO 80027

(City) (State) (Zip)

UNITED STATES

(Country)

2. Date of Event Requiring Statement (Month/Day/Year)
07/01/2026

3. Issuer Name and Ticker or Trading Symbol
Solid Power, Inc. [ SLDP ]

3a. Foreign Trading Symbol

5. If Amendment, Date of Original Filed (Month/Day/Year)

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

No securities are beneficially owned.

	/s/ Linda Heller, attorney-in-fact on behalf of Uwe Breitweg	07/06/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 3: SEC 1473 (03-26)