DINO HF Sinclair Corporation

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

SCHEDULE 13D

Under the Securities Exchange Act of 1934

(Amendment No. 5)*

HF Sinclair Corporation

(Name of Issuer)

Common Stock

(Title of Class of Securities)

403949100

(CUSIP Number)

REH Company

550 East South Temple

Salt Lake City, Utah 84102

Attn: General Counsel

with a copy to:

Scott Wulfe

Alan Beck

Vinson & Elkins LLP

845 Texas Avenue, Suite 4700

Houston, TX 77002

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)

September 28, 2022

(Date of Event which Requires Filing of this Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box.  ☐

Note. Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See Rule 13d-7 for other parties to whom copies are to be sent.

The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of section 18 of the Securities Exchange Act of 1934, as amended (the “Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

CUSIP No. 403949100

2

CUSIP No. 403949100

3

SCHEDULE 13D

This Amendment No. 5 (this “Amendment”) supplements the information set forth in the Schedule 13D filed by the Reporting Persons with the SEC, as amended from time to time (the “Schedule 13D”), relating to the common stock, par value $0.01 per share (“Common Stock”) of HF Sinclair Corporation, a Delaware corporation (the “Issuer”). All capitalized terms contained herein but not otherwise defined shall have the meanings ascribed to such terms in the Schedule 13D.

The information set forth in response to each separate Item below shall be deemed to be a response to all Items where such information is relevant. The Schedule 13D is hereby supplementally amended as follows:

The information contained in Items 3 and 6 of the Schedule 13D is incorporated herein by reference.

On September 28, 2022, the Issuer entered into a Stock Purchase Agreement (the “Fifth Purchase Agreement”) with REH to repurchase 1,881,113 shares of the Issuer’s Common Stock, for $53.16 per share for the aggregate purchase price of $99,999,967 in a privately negotiated transaction (the “Fifth Repurchase Transaction”). The Fifth Repurchase Transaction is expected to close on or about October 3, 2022, subject to customary closing conditions. The foregoing description of the Fifth Purchase Agreement does not purport to be complete and is qualified in its entirety by reference to the full text of the Fifth Purchase Agreement, which is filed as Exhibit 10.7 hereto and is incorporated herein by reference.

(a.) – (b.) The aggregate number and percentage of Common Stock beneficially owned by the Reporting Persons (on the basis of a total of 216,843,583 shares of Common Stock outstanding as of August 5, 2022 as reported in the Issuer’s Quarterly Report on Form 10-Q, filed with the SEC on August 8, 2022 less the Common Stock acquired by the Issuer pursuant to the Fifth Repurchase Transaction, the Fourth Repurchase Transaction, the Third Repurchase Transaction, the Second Repurchase Transaction and the Repurchase Transaction) are as follows:

Percentage: 23.6%

Percentage: 23.6%

4

The shares set forth above are directly owned by REH and not Mrs. Holding. REH is the primary and direct beneficial owner of the shares indicated above, and the board of directors of REH has all voting and investment power with respect to such shares. However, as a result of her relationship with REH, Mrs. Holding may be deemed to also beneficially own such shares under applicable securities law and SEC guidance. Mrs. Holding, however, does not intend ever to own such shares directly for investment purposes in the future and expressly disclaims such beneficial ownership to the maximum extent permitted by law. REH and Mrs. Holding are collectively referred to herein as the “Reporting Persons.”

The Reporting Persons have entered into a Joint Filing Agreement, a copy of which was filed with the Schedule 13D as Exhibit 99.1, pursuant to which the Reporting Persons have agreed to file this Schedule 13D jointly in accordance with the provisions of Rule 13d-1(k)(1) under the Act.

(c.) To the best knowledge of the Reporting Persons, no transactions were effected by the Reporting Persons during the past 60 days other than the transactions described herein, the Fourth Repurchase Transaction, Third Repurchase Transaction, the Second Repurchase Transaction and the Repurchase Transaction. The disclosure regarding the Fifth Repurchase Transaction in Item 4 is incorporated herein by reference.

(d.) No other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, any of the Common Stock beneficially owned by the Reporting Persons, other than as described herein.

(e.) Not applicable.

The information contained in Item 3 of the Schedule 13D and Item 4 of this Amendment is incorporated herein by reference.

On September 28, 2022, the Issuer entered into the Fifth Purchase Agreement with REH to repurchase 1,881,113 shares of Common Stock, for $53.16 per share for the aggregate purchase of $99,999,967 in a privately negotiated transaction. The foregoing description of the Fifth Purchase Agreement does not purport to be complete and is qualified in its entirety by reference to the full text of the Fifth Purchase Agreement, which is filed as Exhibit 10.7 hereto and is incorporated herein by reference.

5

SIGNATURES

After reasonable inquiry and to the best of my knowledge and belief, each of the undersigned certifies that the information set forth in this statement is true, complete and correct.

September 30, 2022

6