[Form 3] Solaris Energy Infrastructure, Inc. Initial Statement of Beneficial Ownership

Rhea-AI Filing Summary

Solaris Energy Infrastructure (SEI)Director and Co‑Chief Executive Officer, who beneficially owns 12,411 shares of Class A Common Stock in direct form. No derivative securities are listed. The stated event date is 10/16/2025.

10/17/2025 - 04:11 PM

SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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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1. Name and Address of Reporting Person^*

Brock Amanda M

(Last) (First) (Middle)

9651 KATY FREEWAY

SUITE 300

(Street)

HOUSTON TX 77024

(City) (State) (Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
10/16/2025

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

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

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Co-Chief Executive Officer

5. 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 Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Class A Common Stock	12,411	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

	/s/ Christopher M. Powell, Attorney-in-Fact	10/17/2025
	** 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 5 (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 SEI disclose in this Form 3 filing?

Initial insider ownership for a Director and Co‑Chief Executive Officer, including 12,411 shares of Class A Common Stock held directly.

How many SEI shares does the reporting person hold?

The filing shows 12,411 shares of Class A Common Stock beneficially owned, held directly.

Does the Form 3 report any derivative securities for SEI?

No. The derivative securities table shows no entries.

What is the reporting person’s relationship to SEI (ticker SEI)?

The person is a Director and an Officer, serving as Co‑Chief Executive Officer.

What is the event date associated with this ownership report for SEI?

The Date of Event Requiring Statement is 10/16/2025.

Is this Form 3 filed by one or multiple reporting persons?

It is filed by one reporting person.

Who signed the filing and when?

It was signed by /s/ Christopher M. Powell, Attorney‑in‑Fact on 10/17/2025.