Solid Power (SLDP) CEO granted 1.27M RSUs and has shares withheld for taxes

Rhea-AI Filing Summary

Solid Power, Inc. President & CEO John C. Van Scoter reported equity compensation and related tax withholding. He received a grant of 1,267,828 restricted stock units, each representing one share of common stock, which will vest in 16 equal quarterly installments starting on June 30, 2026, subject to continued service. Separately, 42,842 shares of common stock were withheld at $2.82 per share to cover tax obligations upon RSU vesting. Following these transactions, he holds 5,180,161 common shares directly.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Van Scoter John C.

Role President & CEO

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	1,267,828	$0.00	--
Tax Withholding	Common Stock	42,842	$2.82	$121K

Holdings After Transaction: Common Stock — 5,180,161 shares (Direct)

Footnotes (1)

1. Represents shares of the issuer's common stock withheld to satisfy the reporting person's tax obligation upon the vesting of restricted stock units. Each restricted stock unit represents a contingent right to receive one share of the underlying common stock of the Issuer. The restricted stock units will vest in 16 equal quarterly installments commencing on June 30, 2026, and thereafter at the end of each fiscal quarter of the Issuer, subject to the reporting person continuing to be a service provider (as defined in the Solid Power, Inc. 2021 Equity Incentive Plan) through the applicable vesting date.

Key Figures

RSU grant: 1,267,828 units Tax withholding shares: 42,842 shares Withholding price: $2.82 per share +3 more

6 metrics

RSU grant 1,267,828 units Restricted stock units granted to CEO

Tax withholding shares 42,842 shares Shares withheld to satisfy tax obligation

Withholding price $2.82 per share Value used for tax-withholding disposition

Shares after RSU grant 5,180,161 shares CEO direct holdings following grant transaction

Shares after tax withholding 3,912,333 shares CEO direct holdings after tax-withholding event

RSU vesting schedule 16 quarterly installments Vesting from June 30, 2026, each fiscal quarter-end

Key Terms

restricted stock unit, tax obligation, vesting, Solid Power, Inc. 2021 Equity Incentive Plan

4 terms

restricted stock unit financial

"Each restricted stock unit represents a contingent right to receive one share"

A restricted stock unit is a promise from a company to give an employee shares of stock after certain conditions are met, like staying with the company for a set amount of time. It’s like earning a bonus that turns into company stock once you’ve proven your commitment, making it a way to motivate and reward employees.

tax obligation financial

"withheld to satisfy the reporting person's tax obligation upon the vesting"

vesting financial

"will vest in 16 equal quarterly installments commencing on June 30, 2026"

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.

Solid Power, Inc. 2021 Equity Incentive Plan financial

"as defined in the Solid Power, Inc. 2021 Equity Incentive Plan"

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^*

Van Scoter John C.

(Last) (First) (Middle)

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
X	Officer (give title below)		Other (specify below)
	President & CEO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
03/31/2026

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	03/31/2026		F		42,842(1)	D	$2.82	3,912,333	D
Common Stock	04/01/2026		A		1,267,828(2)	A	$0	5,180,161	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 shares of the issuer's common stock withheld to satisfy the reporting person's tax obligation upon the vesting of restricted stock units.

2. Each restricted stock unit represents a contingent right to receive one share of the underlying common stock of the Issuer. The restricted stock units will vest in 16 equal quarterly installments commencing on June 30, 2026, and thereafter at the end of each fiscal quarter of the Issuer, subject to the reporting person continuing to be a service provider (as defined in the Solid Power, Inc. 2021 Equity Incentive Plan) through the applicable vesting date.

	/s/ Kristen Gould, attorney-in-fact on behalf of John C. Van Scoter	04/02/2026
	** 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 transactions did Solid Power (SLDP) report for its CEO?

Solid Power reported that President & CEO John C. Van Scoter received 1,267,828 restricted stock units and had 42,842 shares withheld to cover tax obligations. These are compensation-related awards and tax events, not open-market stock purchases or sales by the CEO.

How many Solid Power (SLDP) shares does the CEO hold after these transactions?

After the reported transactions, John C. Van Scoter holds 5,180,161 shares of Solid Power common stock directly. This total reflects the new restricted stock unit grant and the shares withheld for taxes, as shown in the Form 4 ownership figures.

What are the terms of the new restricted stock units granted to Solid Power’s CEO?

The 1,267,828 restricted stock units each represent one share of Solid Power common stock. They vest in 16 equal quarterly installments beginning June 30, 2026, and then at each fiscal quarter-end, as long as the CEO continues to serve under the 2021 Equity Incentive Plan.

Why were 42,842 Solid Power (SLDP) shares withheld from the CEO?

Solid Power withheld 42,842 shares of common stock from John C. Van Scoter to satisfy his tax obligations related to RSU vesting. The withholding was recorded at $2.82 per share and represents a tax payment mechanism rather than an open-market stock sale.

Is the CEO’s RSU grant at Solid Power an open-market purchase of SLDP stock?

No. The 1,267,828 restricted stock units granted to John C. Van Scoter are an equity compensation award with a future vesting schedule. They are not open-market purchases; they convert into shares over time as vesting conditions are met.