[Form 4] Solaris Oilfield Infrastructure, Inc. Insider Trading Activity

Rhea-AI Filing Summary

Laurie H. Argo, a director of Solaris Energy Infrastructure, Inc. (SEI), received a restricted stock award for 6,275 shares of Class A common stock on 08/23/2025. The award was granted at no cash cost and vests in full on the first anniversary of the grant date. After the grant, Ms. Argo is reported to beneficially own 52,339 shares of Class A common stock, which figure includes the 6,275 shares that remain subject to vesting. The Form 4 was filed by one reporting person and was signed by an attorney-in-fact on 08/26/2025.

Positive

• Director received equity via restricted stock, aligning interests with shareholders
• Vesting provision (vests in full after one year) promotes retention and reduces immediate sell pressure
• Timely disclosure filed and signed on 08/26/2025

Negative

• None.

Insights

Corporate Governance Expert

TL;DR: Routine director equity award aligns executive compensation with shareholder interests and follows standard vesting practices.

The reported restricted stock award is a common governance practice to align a director's incentives with long-term shareholder value. The 12-month cliff vesting indicates a short-term retention incentive rather than multi-year performance-based compensation. The disclosure is straightforward: 6,275 Class A shares granted at $0, vesting in full on the one-year anniversary, and total beneficial ownership reported as 52,339 shares. No indication of accelerated vesting, derivative instruments, or related-party transactions is present in the filing.

Securities Analyst

TL;DR: Transaction is immaterial to market capitalization but increases insider alignment with equity performance.

The Form 4 shows a non-cash grant of 6,275 Class A shares to a director, increasing her reported beneficial ownership to 52,339 shares. From a market-impact perspective, the size of the grant is small relative to typical public company floats and therefore unlikely to move the stock price. The grant being restricted and vesting in one year reduces short-term sell pressure and signals a retention motive. Filing and signature by an attorney-in-fact on 08/26/2025 meet disclosure requirements.

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

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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^*

Argo Laurie H

(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)

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

3. Date of Earliest Transaction (Month/Day/Year)
08/23/2025

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	08/23/2025		A		6,275(1)	A	$0	52,339(2)	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 pursuant to the Solaris Energy Infrastructure, Inc. Long Term Incentive Plan. The award vests in full on the first anniversary of the grant date.

2. Includes 6,275 shares of Class A common stock subject to previously granted Restricted Stock Awards that remain subject to vesting.

	/s/ Christopher M. Powell, Attorney-in-Fact	08/26/2025
	** 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.

FAQ

What did Laurie H. Argo report on the Form 4 for SEI?

She reported receiving a restricted award of 6,275 Class A common shares on 08/23/2025 and now beneficially owns 52,339 shares including the restricted shares.

What are the terms of the restricted stock award reported on Form 4?

The award was granted at $0 and vests in full on the first anniversary of the grant date.

When was the transaction and when was the Form 4 signed?

The transaction date is 08/23/2025 and the Form 4 was signed by an attorney-in-fact on 08/26/2025.

Does the filing show any derivative transactions or option exercises?

No. The filing discloses only a non-derivative restricted stock award of Class A common stock; Table II lists no derivative securities.

How much of the reported ownership is subject to vesting?

The filing states that the 6,275 shares granted are subject to vesting and are included in the total 52,339 shares beneficially owned.