Sec Form 4 Filing - REH Co @ HF Sinclair Corp - 2024-06-14

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 REH Co 2. Issuer Name and Ticker or Trading Symbol HF Sinclair Corp [ DINO] 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) 2800 WEST LINCOLNWAY 3. Date of Earliest Transaction (MM/DD/YY) 06/14/2024 (Street) CHEYENNE, WY82009 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 06/14/2024 J( 1 ) 16,057,699 D 0 ( 1 ) D ( 1 )

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 REH Co 2800 WEST LINCOLNWAY CHEYENNE, WY82009 X Signatures REH COMPANY, By: /s/ Ross B. Matthews, Name: Ross B. Matthews, Title: Chief Operating Officer 06/14/2024 Signature of Reporting Person Date

Explanation of Responses:

( 1 )On June 14, 2024, REH Company (f/k/a The Sinclair Companies) (the "Reporting Person") and REH Advisors Inc. ("Advisors") completed an internal reorganization, pursuant to which a wholly-owned subsidiary of Advisors merged with and into the Reporting Person, with the Reporting Person surviving and becoming a wholly-owned subsidiary of Advisors, and in connection therewith, the Reporting Person distributed 16,057,699 shares of the Issuer's common stock to Advisors. As a result, the Reporting Person ceased to beneficially own any securities of the Issuer. Such internal reorganization did not involve any purchase or sale of securities of the Issuer. A separate Form 3 will be filed by Advisors with respect to such internal reorganization. The beneficial ownership and pecuniary interest of Carol Orme Holding ("Mrs. Holding") in the securities reported herein has not changed.

Remarks: Ross B. Matthews currently serves as the Reporting Person's representative on the Issuer's board of directors, and therefore, the Reporting Person, Advisor (as a result of its relationship with the Reporting Person) and Mrs. Holding (as a result of her relationship with the Reporting Person) each constitutes a "director by deputization" of the Issuer.

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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