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

Rhea-AI Filing Summary

Solaris Energy Infrastructure, Inc. director Mario Max Yzaguirre received a restricted stock award under the company’s Long Term Incentive Plan. On 08/23/2025 Mr. Yzaguirre was granted 5,963 shares of Class A common stock that vest in full on the first anniversary of the grant date at no cash price, increasing his total beneficial ownership of unvested restricted Class A shares to 8,324. The Form 4 was signed by an attorney-in-fact on 08/26/2025. The filing discloses the award type and vesting schedule but provides no additional financial terms or past trading history.

Positive

• Director alignment with shareholders through a time-based restricted stock award that vests in one year
• Non-cash grant (price reported as $0) suggests retention rather than immediate liquidity extraction

Negative

• No material financial details such as total outstanding shares or market value provided, limiting assessment of magnitude
• Shares remain unvested so there is no immediate change in voting power or market exposure

Insights

Corporate Governance Expert

TL;DR: Director received time-based restricted shares, indicating alignment with long-term shareholder interests but limited immediate liquidity impact.

The award is a standard time-based restricted stock grant that vests in one year, which aligns the director with the company’s multi-period performance and retention goals. The grant price is $0, consistent with typical restricted stock awards intended to retain senior personnel or directors rather than to remunerate for cash. The incremental 5,963-share grant increases unvested holdings to 8,324 shares, which remains subject to future vesting and therefore does not immediately dilute voting power materially. The disclosure is routine and contains no additional compensatory metrics or performance conditions.

Securities Analyst

TL;DR: Insider acquisition of restricted shares is a neutral-to-mildly positive signal but lacks magnitude or pricing context for material impact.

The Form 4 documents a non-derivative acquisition by a director under the Long Term Incentive Plan. Because the award vests after one year and was granted at no cash price, the near-term financial effect on the director and on outstanding shares is limited. Without share counts, market value, or additional awards disclosed, this transaction is informational and routine for governance and compensation transparency. No trading or sales were reported.

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^*

YZAGUIRRE MARIO MAX

(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		5,963(1)	A	$0	8,324(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 8,324 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 Mario Max Yzaguirre report on the Form 4 for Solaris Energy Infrastructure, Inc.?

He reported a restricted stock award of 5,963 Class A shares granted on 08/23/2025 that vest in full on the first anniversary of the grant date.

How many Class A shares does the reporting person beneficially own after the transaction?

8,324 shares of Class A common stock are reported as subject to previously granted restricted awards and current holdings.

Was there a cash price paid for the restricted stock award?

The reported price is $0, indicating a grant rather than a purchase.

When was the Form 4 signed and filed?

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

Does the filing disclose any performance conditions for vesting?

No performance conditions are disclosed; the filing states the award vests in full on the first anniversary of the grant date.