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).
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1. Name and Address of Reporting Person* Zartler William A (Last) (First) (Middle) 9651 KATY FREEWAY SUITE 300 (Street) HOUSTON TX 77024 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol Solaris Oilfield Infrastructure, Inc. [ SOI ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X Director X 10% Owner X Officer (give title below) Other (specify below) CHAIRMAN AND CEO
	3. Date of Earliest Transaction (Month/Day/Year) 03/01/2024
	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	03/01/2024		A		267,411(1)(2)	A	$0	917,551	D
Class A Common Stock	03/01/2024		F		52,588(3)	D	$8.47	864,963(4)	D
Class B Common Stock								726,819	D
Class B Common Stock								3,513,496	I	See Footnote(5)

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 Oilfield Infrastructure, LLC Units	(6)							(6)	(6)	Class A Common Stock	726,819		726,819	D
Solaris Oilfield Infrastructure, LLC Units	(6)							(6)	(6)	Class A Common Stock	3,513,496		3,513,496	I	See Footnote(5)

Explanation of Responses:

1. Includes 262,500 shares from Restricted Stock Award granted pursuant to the Solaris Oilfield Infrastructure, Inc. Long Term Incentive Plan on the date indicated. The award vests in three equal annual installments on the first three anniversaries of the grant date.

2. Includes 4,911 shares vested from Performance-Based Restricted Stock Unit (PSU) Agreement pursuant to the Solaris Oilfield Infrastructure, Inc. Long Term Incentive Plan. The PSUs, which were originally granted on March 1, 2023, vested based on the issuer's level of achievement with respect to relative total stockholder return during the applicable performance period (which began on January 1, 2023 and ended on December 31, 2023).

3. Represents shares withheld by the Company to satisfy tax withholding obligations upon the vesting of previously granted Restricted Stock Awards and Performance-Based Restricted Stock Awards.

4. Includes 436,717 shares of Class A common stock subject to previously granted Restricted Stock Awards that remain subject to vesting.

5. Represents shares held by Solaris Energy Capital. The Reporting Person is the sole member of Solaris Energy Capital and has the authority to vote or dispose of the shares held by Solaris Energy Capital in his sole discretion. The Reporting Person disclaims beneficial ownership of the shares held by Solaris Energy Capital in excess of his pecuniary interest therein.

6. 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	03/05/2024
	** 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).
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