Sec Form 4 Filing - Clark Morris R @ STR Sub Inc. - 2022-12-29

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 Clark Morris R 2. Issuer Name and Ticker or Trading Symbol STR Sub Inc. [ NONE] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 1401 LAWRENCE STREET, 1750 3. Date of Earliest Transaction (MM/DD/YY) 12/29/2022 (Street) DENVER, CO80202 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 Class A Common Stock 12/29/2022 D 10,431 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

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Clark Morris R 1401 LAWRENCE STREET, 1750 DENVER, CO80202 X Signatures By: /s/ Morris R. Clark, by Brett S. Riesenfeld, Attorney-in-Fact 01/03/2023 Signature of Reporting Person Date

Explanation of Responses:

( 1 )On December 29, 2022, pursuant to the Agreement and Plan of Merger, dated September 6, 2022, (as amended from time to time, the "Merger Agreement"), by and among Sitio Royalties Corp ("Sitio"), Sitio Royalties Operating Partnership, LP ("Opco LP"), Snapper Merger Sub I, Inc. ("New Sitio"), Snapper Merger Sub IV, Inc. ("Brigham Merger Sub"), Snapper Merger Sub V, Inc. ("Sitio Merger Sub"), Snapper Merger Sub II, LLC ("Opco Merger Sub"), Brigham Minerals, Inc. ("Brigham"), and Brigham Minerals Holdings, LLC ("Opco LLC"), Sitio acquired Brigham in an all-stock transaction through: (i) the merger of Brigham Merger Sub with and into Brigham (the "Brigham Merger"), with Brigham surviving the Brigham Merger as a wholly owned subsidiary of New Sitio, ( 2 )(Continued from Footnote 1) (ii) the merger of Sitio Merger Sub with and into Sitio (the "Sitio Merger"), with Sitio surviving the Sitio Merger as a wholly owned subsidiary of New Sitio, and (iii) the merger of Opco Merger Sub LLC with and into Opco LLC (the "Opco Merger," and, together with the Brigham Merger and the Sitio Merger, the "Mergers"), with Opco LLC surviving the Opco Merger as a wholly owned subsidiary of Opco LP, in each case on the terms set forth in the Merger Agreement. As a result of the Mergers, Sitio and Brigham became direct wholly owned subsidiaries of New Sitio. Effective as of the effective time of the Sitio Merger (the "First Effective Time"), each share of Sitio Class A Common Stock was converted into the right to receive one share of New Sitio Class A Common Stock. ( 3 )(Continued from Footnote 2) Contemporaneously with the filing of this Form 4 to reflect the disposition of securities by the Reporting Person in connection with the consummation of the Sitio Merger, the Reporting Person is filing a Form 4 with respect to New Sitio to report the acquisition by such Reporting Person of an equal number of shares of securities in connection with the consummation of the Sitio Merger. This Form 4 only reports the disposition of securities of the Reporting Person pursuant to the Merger Agreement and does not reflect sales of securities by the Reporting Person. ( 4 )Pursuant to the Merger Agreement, effective as of the First Effective Time and in connection with the consummation of the Sitio Merger, each outstanding restricted stock unit (including deferred share units) subject solely to time-based vesting and denominated in Sitio Class A Common Stock (collectively, the "Old Sitio RSUs") was cancelled and converted into an equivalent restricted stock unit (collectively, the "New Sitio RSUs"), on the same terms and conditions (including as to vesting and forfeiture) as were applicable under the Old Sitio RSUs, each of which represents a contingent right to receive the number of shares of New Sitio Class A Common Stock equal to the number of shares of Sitio Class A Common Stock subject to such Old Sitio RSUs immediately prior to the First Effective Time. ( 5 )(Continued from Footnote 4) As used herein, the term "RSUs" refers to (i) Old Sitio RSUs prior to the First Effective Time and (ii) New Sitio RSUs following the First Effective Time, in each case, unless the context requires otherwise. ( 6 )Represents Old Sitio RSUs granted to the reporting person pursuant to the Sitio Royalties Corp. Long Term Incentive Plan (the "Old Sitio LTIP") , which were cancelled and converted into New Sitio RSUs in connection with the consummation of the Sitio Merger as described above. Each Old Sitio RSU represented a contingent right to receive one share of Sitio Class A Common Stock. The Old Sitio RSUs would have vested on the first anniversary of June 7, 2022, subject to the reporting person's continuous service through such date.

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