Sec Form 4 Filing - Crabb Joseph M @ Nuverra Environmental Solutions, Inc. - 2022-02-23

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

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, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Crabb Joseph M 2. Issuer Name and Ticker or Trading Symbol Nuverra Environmental Solutions, Inc. [ NES] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) EVP & Chief Legal Officer (Last) (First) (Middle) C/O NUVERRA ENVIRONMENTAL SOLUTIONS, INC, 11111 KATY FREEWAY, SUITE 1006 3. Date of Earliest Transaction (MM/DD/YY) 02/23/2022 (Street) HOUSTON, TX77079 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 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 Common Stock 02/23/2022 M 42,194 A 101,194 D Common Stock 02/23/2022 D 101,194 D 0 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 (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 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 (MM/DD/YY) 7. Title and Amount of Underlying Securities (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 of Derivative Security: 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 Restricted Stock Units ( 1 ) 02/23/2022 M 42,194 ( 5 ) ( 5 ) Common Stock 42,194 $ 0 0 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Crabb Joseph M C/O NUVERRA ENVIRONMENTAL SOLUTIONS, INC 11111 KATY FREEWAY, SUITE 1006 HOUSTON, TX77079 EVP & Chief Legal Officer Signatures /s/ Joseph M. Crabb 02/23/2022 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Each Restricted Stock Unit represents a contingent right to receive one share of the Issuer's common stock. ( 2 )Does not reflect tax withholding amounts that will occur upon settlement of the Restricted Stock Units following closing of the Mergers (as defined below). ( 3 )On February 23, 2022, pursuant to the Agreement and Plan of Merger, dated December 12, 2021 (the "Merger Agreement"), (i) a direct wholly owned subsidiary of Select Energy Services, Inc. ("Select") merged with and into the Issuer, with the Issuer surviving as a direct wholly owned subsidiary of Select (the "Initial Merger"), and (ii) immediately following the Initial Merger, the Issuer merged with and into an indirect wholly owned subsidiary of Select ("Holdco"), with Holdco surviving the merger as an indirect wholly owned subsidiary of Select (the "Subsequent Merger" and, together with the Initial Merger, the "Mergers"). ( 4 )(Continued from Footnote 3) On February 23, 2022, pursuant to the Merger Agreement, each share of the Issuer's common stock issued and outstanding prior to the effective time of the Initial Merger was converted into the right to receive a number of shares of Select's Class A common stock (the "Class A Common Stock") equal to 0.2551 per share. On February 23, 2022, the per share closing price of the Class A Common Stock was $8.53. ( 5 )On December 16, 2020, the Reporting Person was granted a time-based award of 42,194 Restricted Stock Units under the Issuer's 2017 Long Term Incentive Plan (the "Plan"), vesting annually in two equal installments beginning on December 31, 2021. In connection with the consummation of the Mergers, each outstanding and unvested Restricted Stock Unit vested immediately prior to the effective time of the Initial Merger pursuant to the Plan and the Reporting Person's employment agreement with the Issuer.

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