Solaris Energy Infrastructure (SEI) director sells 47,011 Class A shares

Rhea-AI Filing Summary

Solaris Energy Infrastructure, Inc. director and chief administrative officer reported selling 47,011 shares of Class A common stock on December 17, 2025 at a weighted average price of $44.62 per share, with individual sale prices ranging from $44.21 to $45.47.

After this transaction, the insider beneficially owns 131,152 shares of Class A common stock, including 86,929 shares subject to previously granted restricted stock awards that remain subject to vesting, as well as 165,038 shares of Class B common stock and an equal number of Solaris Energy Infrastructure, LLC units that are exchangeable into Class A shares under the Solaris LLC Agreement.

Insider Trade Summary

Net Seller: 47,011 shares ($2,097,631)

Net Sell 3 txns

Insider Durrett Cynthia M.

Role CHIEF ADMINISTRATIVE OFFICER

Sold 47,011 shs ($2.10M)

Type	Security	Shares	Price	Value
Sale	Class A Common Stock	47,011	$44.62	$2.10M
holding	Solaris Energy Infrastructure, LLC Units	--	--	--
holding	Class B Common Stock	--	--	--

Holdings After Transaction: Class A Common Stock — 131,152 shares (Direct); Solaris Energy Infrastructure, LLC Units — 165,038 shares (Direct); Class B Common Stock — 165,038 shares (Direct)

Footnotes (1)

1. The reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $44.21 to $45.47 per share. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the U.S. Securities and Exchange Commission (the "SEC"), upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. Includes 86,929 shares of Class A common stock subject to previously granted Restricted Stock Awards that remain subject to vesting. Each share of Class B common stock has no economic rights but entitles the holder to one vote on all matters to be voted on by the stockholders generally. Subject to the terms of the Solaris LLC Agreement, the Solaris LLC Units (together with a corresponding number of shares of Class B common stock) are exchangeable from time to time for shares of Class A common stock of the Issuer.

Form 4 Insider Transactions: What Each Field Means →

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^*

Durrett Cynthia M.

(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
X	Officer (give title below)		Other (specify below)
	CHIEF ADMINISTRATIVE OFFICER

3. Date of Earliest Transaction (Month/Day/Year)
12/17/2025

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	12/17/2025		S		47,011	D	$44.62(1)	131,152(2)	D
Class B Common Stock(3)								165,038	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
Solaris Energy Infrastructure, LLC Units	(4)							(4)	(4)	Class A Common Stock	165,038		165,038	D

Explanation of Responses:

1. The reported price in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $44.21 to $45.47 per share. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the U.S. Securities and Exchange Commission (the "SEC"), upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

2. Includes 86,929 shares of Class A common stock subject to previously granted Restricted Stock Awards that remain subject to vesting.

3. Each share of Class B common stock has no economic rights but entitles the holder to one vote on all matters to be voted on by the stockholders generally.

4. Subject to the terms of the Solaris LLC Agreement, the Solaris LLC Units (together with a corresponding number of shares of Class B common stock) are exchangeable from time to time for shares of Class A common stock of the Issuer.

	/s/ Christopher M. Powell, Attorney-in-Fact	12/18/2025
	** 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 insider transaction did Solaris Energy Infrastructure (SEI) report?

A director and chief administrative officer of Solaris Energy Infrastructure, Inc. reported a sale of Class A common stock, as disclosed in an insider transaction report.

How many Solaris Energy Infrastructure (SEI) shares were sold and at what price?

The insider sold 47,011 shares of Class A common stock at a weighted average price of $44.62 per share, with individual sale prices ranging from $44.21 to $45.47.

How many Solaris Energy Infrastructure (SEI) Class A shares does the insider own after the sale?

Following the reported transaction, the insider beneficially owns 131,152 shares of Class A common stock, which includes 86,929 shares subject to previously granted restricted stock awards that remain subject to vesting.

What is the insider’s holding of Solaris Energy Infrastructure (SEI) Class B common stock?

The insider beneficially owns 165,038 shares of Class B common stock, each of which has no economic rights but entitles the holder to one vote on matters submitted to stockholders.

What are Solaris Energy Infrastructure, LLC units and how are they related to SEI Class A stock?

The insider holds 165,038 Solaris Energy Infrastructure, LLC units. Subject to the terms of the Solaris LLC Agreement, these units, together with a corresponding number of shares of Class B common stock, are exchangeable from time to time for shares of Class A common stock of the issuer.

What special terms apply to the reported restricted stock awards of Solaris Energy Infrastructure (SEI)?

The insider’s holdings include 86,929 shares of Class A common stock that are subject to previously granted Restricted Stock Awards and remain subject to vesting conditions.