Solaris Energy (SEI) CAO receives stock awards and withholds shares for taxes

Rhea-AI Filing Summary

Solaris Energy Infrastructure, Inc. Chief Accounting Officer Christopher P. Wirtz reported equity compensation-related transactions in Class A common stock. On March 1, 2026, he acquired 3,296 shares through a restricted stock award that vests in three equal installments over three years and 1,814 shares upon vesting and settlement of performance-based restricted stock units granted under the company’s Long Term Incentive Plan. To cover tax withholding obligations tied to vesting of these awards, 2,206 shares were withheld at a price of $49.63 per share, resulting in direct ownership of 36,785 shares of Class A common stock, including 17,791 unvested restricted shares that remain subject to future vesting.

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

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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^*

Wirtz Christopher P.

(Last) (First) (Middle)

9651 KATY FREEWAY

SUITE 300

(Street)

HOUSTON TX 77024

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Solaris Energy Infrastructure, Inc. [ SEI ]

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

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

3. Date of Earliest Transaction (Month/Day/Year)
03/01/2026

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

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 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
Class A Common Stock	03/01/2026		A		3,296(1)	A	$0	37,177	D
Class A Common Stock	03/01/2026		A		1,814(2)	A	$0	38,991	D
Class A Common Stock	03/01/2026		F		2,206(3)	D	$49.63	36,785(4)	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. Restricted Stock Award granted pursuant to the Solaris Energy Infrastructure, Inc. Long Term Incentive Plan on the date indicated. The award vests in three equal installments on the first three anniversaries of the grant date.

2. Reflects the vesting and settlement of shares that relate to multiple Performance-Based Restricted Stock Unit (PSU) awards granted pursuant to the Solaris Energy Infrastructure, Inc. Long Term Incentive Plan. The PSUs which were originally granted on March 1, 2024 and March 1, 2025 vested and were settled based on the Issuer's level of achievement with respect to the applicable performance goals.

3. Represents shares withheld by the Company to satisfy tax withholding obligations upon the vesting of previously granted Restricted Stock Awards and Performance-Based Restricted Stock Awards.

4. Includes 17,791 shares of Class A common stock subject to previously granted Restricted Stock Awards that remain subject to vesting.

Remarks:

	/s/ Christopher M. Powell, Attorney-in-Fact	03/03/2026
	** 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).
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FAQ

What insider transactions did SEI Chief Accounting Officer Christopher Wirtz report?

Christopher Wirtz reported equity compensation-related transactions involving Class A common stock. He received restricted stock and performance-based share settlements, and had shares withheld to cover tax obligations, reflecting routine long-term incentive plan activity rather than open-market buying or selling.

How many Solaris Energy Infrastructure (SEI) shares did the CAO acquire on March 1, 2026?

On March 1, 2026, the CAO acquired 3,296 shares via a restricted stock award and 1,814 shares from vesting performance-based restricted stock units, all under SEI’s Long Term Incentive Plan, increasing his equity-based compensation holdings in Class A common stock.

Why were 2,206 SEI shares disposed of in Christopher Wirtz’s Form 4 filing?

The 2,206 shares were withheld by Solaris Energy Infrastructure to satisfy tax withholding obligations when previously granted restricted and performance-based awards vested. This tax-withholding disposition occurred at $49.63 per share and did not represent an open-market sale by the executive.

What is the vesting schedule for the new SEI restricted stock award to the CAO?

The restricted stock award of 3,296 SEI shares vests in three equal annual installments. Vesting occurs on each of the first three anniversaries of the March 1, 2026 grant date, aligning the Chief Accounting Officer’s compensation with longer-term company performance.

How many SEI shares does Christopher Wirtz own after these Form 4 transactions?

After the reported transactions, Christopher Wirtz directly owns 36,785 SEI Class A shares. This amount includes 17,791 shares subject to previously granted restricted stock awards that remain unvested and continue to be tied to future vesting conditions under the incentive plan.

What performance-based awards were involved in the SEI CAO’s March 1, 2026 transactions?

The filing references performance-based restricted stock unit awards originally granted on March 1, 2024 and March 1, 2025. These PSUs vested and settled into shares based on Solaris Energy Infrastructure’s achievement of specified performance goals under its Long Term Incentive Plan.