Solaris Energy Infrastructure (SEI) grants director 3,160-share award

Rhea-AI Filing Summary

Solaris Energy Infrastructure, Inc. (SEI) director Mario Max Yzaguirre reported an acquisition of 3,160 shares of Class A common stock on August 23, 2026 as a Restricted Stock Award under the Solaris Energy Infrastructure, Inc. Long Term Incentive Plan. The award vests in full on the first anniversary of the grant date. After this grant, he directly holds 11,484 shares of Class A common stock, including 3,160 shares from previously granted Restricted Stock Awards that remain subject to vesting.

Insider Trade Summary

Net Buyer: 3,160 shares

Net Buy 1 txn

Insider YZAGUIRRE MARIO MAX

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Class A Common Stock F1, F2	3,160	$0.00	$0.00

Holdings After Transaction: Class A Common Stock — 11,484 shares (Direct)

Footnotes (2)

1. F1. 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. F2. Includes 3,160 shares of Class A common stock subject to previously granted Restricted Stock Awards that remain subject to vesting.

Key Figures

Shares acquired: 3,160 shares of Class A Common Stock Price per share: $0.00 per share Total holdings after transaction: 11,484 shares of Class A Common Stock +1 more

4 metrics

Shares acquired 3,160 shares of Class A Common Stock Restricted Stock Award granted on August 23, 2026

Price per share $0.00 per share Reported transaction price for the Restricted Stock Award

Total holdings after transaction 11,484 shares of Class A Common Stock Direct ownership by Mario Max Yzaguirre following the grant

Unvested Restricted Stock Awards 3,160 shares of Class A Common Stock Shares subject to previously granted Restricted Stock Awards that remain subject to vesting

Key Terms

Restricted Stock Award, Long Term Incentive Plan, vests in full

3 terms

Restricted Stock Award financial

"Restricted Stock Award pursuant to the Solaris Energy Infrastructure, Inc. Long Term Incentive Plan."

A restricted stock award is company shares given to an employee or executive that cannot be sold or fully owned until certain conditions—like staying with the company for a set time or hitting performance targets—are met. Think of it as a gift that only becomes yours after you fulfill specific obligations; for investors, these awards matter because they can increase the total shares outstanding when they vest, reveal how management is being paid and motivated, and create potential selling pressure when restrictions lift.

Long Term Incentive Plan financial

"pursuant to the Solaris Energy Infrastructure, Inc. Long Term Incentive Plan."

A long term incentive plan is a company program that awards executives and key employees bonuses—often in stock, options, or cash—only if the business meets multi-year performance goals. It links management pay to company results—like tying a coach’s bonus to a team’s multi-season record—so investors monitor it for how leaders are motivated, potential share dilution, and signals about the company’s long-term priorities.

vests in full financial

"The award vests in full on the first anniversary of the grant date."

FAQ

What insider transaction did SEI director Mario Max Yzaguirre report?

He reported a grant of 3,160 shares of Solaris Energy Infrastructure, Inc. Class A common stock on August 23, 2026. The filing describes this as a Restricted Stock Award under the company’s Long Term Incentive Plan, vesting on the first anniversary of the grant date.

Was the SEI insider transaction a market purchase or a compensation grant?

The transaction was a compensation-related grant, coded as a grant, award, or other acquisition (code A). The 3,160 shares were received at a reported price of $0.00 per share as a Restricted Stock Award under the Long Term Incentive Plan.

How many SEI shares does Mario Max Yzaguirre hold after this Form 4 transaction?

Following the reported grant, Mario Max Yzaguirre directly holds 11,484 shares of Solaris Energy Infrastructure, Inc. Class A common stock. This total includes 3,160 shares that are subject to previously granted Restricted Stock Awards and remain subject to vesting conditions.

What are the vesting terms of the SEI Restricted Stock Award reported in this filing?

The filing states that the 3,160-share Restricted Stock Award vests in full on the first anniversary of the grant date. Until vesting, the shares are subject to the conditions of Solaris Energy Infrastructure, Inc.’s Long Term Incentive Plan.

Is the reported SEI insider transaction under a Rule 10b5-1 trading plan?

The filing’s Rule 10b5-1 checkbox is not checked, and there is no footnote indicating a Rule 10b5-1 trading plan. The grant is described as a Restricted Stock Award under the Solaris Energy Infrastructure, Inc. Long Term Incentive Plan.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 08/25/2026 - 04:06 PM Accepted by SEC EDGAR 08/25/2026 - 04:05 PM Learn about SEC filing dates

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^*

YZAGUIRRE MARIO MAX

(Last) (First) (Middle)

9651 KATY FREEWAY

SUITE 300

(Street)

HOUSTON TEXAS 77024

(City) (State) (Zip)

UNITED STATES

(Country)

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)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/23/2026

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
Class A Common Stock	08/23/2026		A		3,160(1)	A	$0	11,484(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 3,160 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	08/25/2026
	** 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)