Form: 4

Statement of changes in beneficial ownership of securities

July 20, 2026

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*
Schmitz John

(Last) (First) (Middle)
1820 N I-35

(Street)
GAINESVILLE TX 76240

(City) (State) (Zip)
2. Issuer Name and Ticker or Trading Symbol
Select Water Solutions, Inc. [ WTTR ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
X Director 10% Owner
X Officer (give title below) Other (specify below)
President & CEO
3. Date of Earliest Transaction (Month/Day/Year)
07/16/2026
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 07/16/2026 A(1) 250,000 A $0.00 536,436 D
Class A Common Stock 274,138 I By GRAT(2)
Class A Common Stock 274,137 I By GRAT(3)
Class A Common Stock 497,924 I By GRAT(4)
Class A Common Stock 497,924 I By GRAT(5)
Class A Common Stock 13,126 I By B-29 GP, LLC
Class A Common Stock 249,243 I By B-29 Investments, LP
Class A Common Stock 1,496,626 I By Family Trust
Class A Common Stock 31,372 I By Family Trust for Child 1
Class A Common Stock 31,373 I By Family Trust for Child 2
Class A Common Stock 31,373 I By Family Trust for Child 3
Class A Common Stock 31,372 I By Family Trust for Child 4
Class A Common Stock 31,373 I By Family Trust for Child 5
Class A Common Stock 31,373 I By Family Trust for Child 6
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
Performance Share Units (6)(7) 07/16/2026 (7) A 125,000(7) (7) (7) Class A Common Stock 125,000 $0.00 125,000 D
Performance Share Units (6)(8) 07/16/2026 (8) A 125,000(8) (8) (8) Class A Common Stock 125,000 $0.00 125,000 D
Performance Share Units (6)(9) 07/16/2026 (9) A 125,000(9) (9) (9) Class A Common Stock 125,000 $0.00 125,000 D
Performance Share Units (6)(10) 07/16/2026 (10) A 125,000(10) (10) (10) Class A Common Stock 125,000 $0.00 125,000 D
Performance Share Units (6)(11) 07/16/2026 (11) A 125,000(11) (11) (11) Class A Common Stock 125,000 $0.00 125,000 D
Performance Share Units (6)(12) 07/16/2026 (12) A 125,000(12) (12) (12) Class A Common Stock 125,000 $0.00 125,000 D
Performance Share Units (6)(13) 07/16/2026 (13) A 125,000(13) (13) (13) Class A Common Stock 125,000 $0.00 125,000 D
Performance Share Units (6)(14) 07/16/2026 (14) A 125,000(14) (14) (14) Class A Common Stock 125,000 $0.00 125,000 D
Performance Share Units (6)(15) 07/16/2026 (15) A 125,000(15) (15) (15) Class A Common Stock 125,000 $0.00 125,000 D
Explanation of Responses:
1. These shares of restricted stock, granted under the Select Water Solutions, Inc. 2024 Equity Incentive Plan (the "Plan"), will vest 1/2 on July 16, 2028, and 1/2 on October 1, 2028.
2. Shares are held directly by the John David Schmitz 2024 Annuity Trust DTD November 13, 2024, of which the reporting person is the trustee.
3. Shares are held directly by the Sandra Lee Schmitz 2024 Annuity Trust DTD November 13, 2024, of which the reporting person is the trustee.
4. Shares are held directly by the John David Schmitz 2026 Annuity Trust DTD May 19, 2026, of which the reporting person is the trustee.
5. Shares are held directly by the Sandra Lee Schmitz 2026 Annuity Trust DTD May 19, 2026, of which the reporting person is the trustee.
6. Each performance share unit ("PSU") represents a contingent right to receive one share of Class A common stock of Select Water Solutions, Inc. (the "Issuer"), par value $0.01 per share ("Common Stock"), pursuant to the Plan.
7. The target number of PSUs granted are eligible to be earned based on the achievement of a certain average closing price of the Issuer's Stock over the period from October 1, 2026 to December 31, 2026, and if earned, shall vest on January 1, 2029.
8. The target number of PSUs granted are eligible to be earned based on the achievement of a certain average closing price of the Issuer's Stock over the period from January 1, 2027 to March 31, 2027, and if earned, shall vest on January 1, 2029.
9. The target number of PSUs granted are eligible to be earned based on the achievement of a certain average closing price of the Issuer's Stock over the period from April 1, 2027 to June 30, 2027, and if earned, shall vest on January 1, 2029.
10. The target number of PSUs granted are eligible to be earned based on the achievement of a certain average closing price of the Issuer's Stock over the period from July 1, 2027 to September 30, 2027, and if earned, shall vest on January 1, 2029.
11. The target number of PSUs granted are eligible to be earned based on the achievement of a certain average closing price of the Issuer's Stock over the period from October 1, 2027 to December 31, 2027, and if earned, shall vest on January 1, 2029.
12. The target number of PSUs granted are eligible to be earned based on the achievement of a certain average closing price of the Issuer's Stock over the period from January 1, 2028 to March 31, 2028, and if earned, shall vest on January 1, 2029.
13. The target number of PSUs granted are eligible to be earned based on the achievement of a certain average closing price of the Issuer's Stock over the period from April 1, 2028 to June 30, 2028, and if earned, shall vest on January 1, 2029.
14. The target number of PSUs granted are eligible to be earned based on the achievement of a certain average closing price of the Issuer's Stock over the period from July 1, 2028 to September 30, 2028, and if earned, shall vest on January 1, 2029.
15. The target number of PSUs granted are eligible to be earned based on the achievement of a certain average closing price of the Issuer's Stock over the period from October 1, 2028 to December 31, 2028, and if earned, shall vest on January 1, 2029.
Remarks:
/s/ John D Schmitz by Calla J Hackler, as Attorney-in-Fact 07/20/2026
** 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.