Solid Power (SLDP) director granted 44,133 restricted stock units

Rhea-AI Filing Summary

Wright MaryAnn reported acquisition or exercise transactions in this Form 4 filing.

Solid Power, Inc. director MaryAnn Wright reported receiving a grant of 44,133 restricted stock units (RSUs), each representing one share of common stock when vested. These RSUs vest on the earlier of the first anniversary of the grant date or the day before Solid Power’s next annual stockholder meeting, provided she continues as a service provider. Following this award, Wright’s direct holdings total 331,730 shares of common stock.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Wright MaryAnn

Role null

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	44,133	$0.00	--

Holdings After Transaction: Common Stock — 331,730 shares (Direct, null)

Footnotes (1)

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Key Figures

RSUs granted: 44,133 units Shares after transaction: 331,730 shares Grant price: $0.00 per share +2 more

5 metrics

RSUs granted 44,133 units Restricted stock units awarded to director MaryAnn Wright

Shares after transaction 331,730 shares MaryAnn Wright direct holdings following the RSU grant

Grant price $0.00 per share RSUs granted as a compensation award, no cash price

Vesting trigger 1 First anniversary of grant date One of the vesting conditions for the RSUs

Vesting trigger 2 Day before next annual meeting Alternative vesting date for the RSUs

Key Terms

restricted stock units, vesting, annual meeting of stockholders, Equity Incentive Plan

4 terms

restricted stock units financial

"Represents restricted stock units, which upon vesting of the unit, represent the right to receive one share"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

vesting financial

"The restricted stock units vest upon the earlier of: (i) the first anniversary of the grant date"

Vesting is the process by which you earn full ownership of something, like company stock or a retirement benefit, over time. It’s like earning the right to keep a gift piece by piece the longer you stay with a company, making sure employees stay committed before they receive all the benefits.

annual meeting of stockholders financial

"or (ii) the day before the issuer's next annual meeting of stockholders following the grant date"

Equity Incentive Plan financial

"as defined in the Solid Power, Inc. 2021 Equity Incentive Plan) through such vesting date"

An equity incentive plan is a program that gives employees, executives or directors the right to receive company stock or options to buy stock as part of their pay. Think of it as offering slices of future company profit to motivate people to boost long‑term performance; for investors it matters because it can align employee goals with shareholder value but also increases the number of shares outstanding, which can dilute existing ownership.

Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

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

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

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:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Wright MaryAnn

(Last) (First) (Middle)

C/O SOLID POWER, INC.

486 S. PIERCE AVE., SUITE E

(Street)

LOUISVILLE COLORADO 80027

(City) (State) (Zip)

UNITED STATES

(Country)

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

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/20/2026

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

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

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

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	05/20/2026		A		44,133(1)	A	$0	331,730	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. 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.

	/s/ Kristen Gould, attorney-in-fact on behalf of MaryAnn Wright	05/21/2026
	** 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 4 (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 4: SEC 1474 (03-26)

FAQ

What insider transaction did Solid Power (SLDP) report for MaryAnn Wright?

Solid Power reported that director MaryAnn Wright received a grant of 44,133 restricted stock units. Each RSU converts into one share of common stock upon vesting, increasing her direct holdings to 331,730 shares after the award.

How many shares did MaryAnn Wright hold after the latest RSU grant at Solid Power (SLDP)?

After the RSU grant, MaryAnn Wright directly holds 331,730 shares of Solid Power common stock. This total includes the 44,133 newly granted restricted stock units, which convert into shares once the vesting conditions are satisfied under the equity plan.

What are the vesting conditions for MaryAnn Wright’s 44,133 RSUs at Solid Power (SLDP)?

The 44,133 restricted stock units vest on the earlier of the first anniversary of the grant date or the day before Solid Power’s next annual stockholder meeting, provided Wright continues as a service provider under the 2021 Equity Incentive Plan.

Did MaryAnn Wright buy or sell Solid Power (SLDP) shares in this Form 4 filing?

The Form 4 shows an acquisition via grant, not an open-market trade. MaryAnn Wright received 44,133 restricted stock units as a compensation award, with no purchase price, rather than buying or selling shares in the market.

What does a transaction code "A" mean in the Solid Power (SLDP) Form 4 for MaryAnn Wright?

Transaction code “A” indicates a grant, award, or similar acquisition. In this case, MaryAnn Wright received 44,133 restricted stock units of Solid Power common stock as a compensation award, which will convert into shares once vesting requirements are met.