[Form 4] HF Sinclair Corp Insider Trading Activity

Rhea-AI Filing Summary

HF Sinclair Corp director REH Advisors Inc. reported a private disposition of 1,455,180 shares of Common Stock back to HF Sinclair. The shares were sold to the issuer at $68.72 per share under a Stock Purchase Agreement dated May 18, 2026. After this transaction, REH Advisors directly holds 11,256,662 HF Sinclair shares.

Insights

Insider transactions analyst

Large private sale to issuer while maintaining a substantial remaining stake.

REH Advisors Inc., a director of HF Sinclair Corp, disposed of 1,455,180 Common Stock shares in a private transaction back to the company at $68.72 per share. The filing describes this as a “Disposition to issuer.”

The footnote explains the sale occurred under a Stock Purchase Agreement dated May 18, 2026, confirming it was a negotiated, off-market deal rather than open-market selling. Following the transaction, REH Advisors still holds 11,256,662 shares, indicating it retains a significant equity position.

This transaction reflects a notable reduction in the reporting person’s holdings, but the remaining position is still large. Future filings may further clarify how this agreement affects REH Advisors’ long-term ownership structure in HF Sinclair.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider REH Advisors Inc.

Role null

Type	Security	Shares	Price	Value
Disposition	Common Stock	1,455,180	$68.72	$100.00M

Holdings After Transaction: Common Stock — 11,256,662 shares (Direct, null)

Footnotes (1)

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Key Figures

Shares disposed: 1,455,180 shares Sale price per share: $68.72 per share Shares held after transaction: 11,256,662 shares +2 more

5 metrics

Shares disposed 1,455,180 shares Common Stock sold to issuer on May 18, 2026

Sale price per share $68.72 per share Private transaction with HF Sinclair

Shares held after transaction 11,256,662 shares Direct HF Sinclair holdings following disposition

Transaction code D (Disposition to issuer) Form 4 non-derivative Common Stock entry

Transaction date May 18, 2026 Date of Stock Purchase Agreement and sale

Key Terms

Disposition to issuer, Stock Purchase Agreement, Common Stock, Reporting Person

4 terms

Disposition to issuer financial

"The filing describes the code D transaction as a “Disposition to issuer.”"

Stock Purchase Agreement financial

"Sold in a private transaction pursuant to the Stock Purchase Agreement dated May 18, 2026."

A stock purchase agreement is a legal contract that sets the terms for buying or selling shares, specifying the price, number of shares, how payment is made, and any conditions or promises each side must meet. It matters to investors because it defines who owns what, when ownership changes, and what protections or obligations attach to the deal—think of it as a detailed receipt plus the house rules that determine the financial risks and benefits of the transaction.

Common Stock financial

"The reported non-derivative security title is “Common Stock.”"

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

Reporting Person regulatory

"These shares were sold by the Reporting Person to the Issuer in a private transaction."

Form 4 Insider Transactions: What Each Field Means →

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^*

REH Advisors Inc.

(Last) (First) (Middle)

2800 WEST LINCOLNWAY

(Street)

CHEYENNE WYOMING 82009

(City) (State) (Zip)

UNITED STATES

(Country)

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)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/18/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

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
Common Stock	05/18/2026		D(1)		1,455,180	D	$68.72	11,256,662	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 (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

Explanation of Responses:

1. These shares were sold by the Reporting Person to the Issuer in a private transaction pursuant to the Stock Purchase Agreement between the Reporting Person and the Issuer dated May 18, 2026.

Remarks:

Ross B. Matthews currently serves as representative of the Reporting Person on the Issuer's board of directors, and therefore the Reporting Person constitutes a "director by deputization" of the Issuer.

	REH ADVISORS INC., By: /s/ Ross B. Matthews, Name: Ross B. Matthews, Title: Chair of the Board	05/20/2026
	** 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.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transaction did REH Advisors Inc. report for HF Sinclair (DINO)?

REH Advisors Inc. reported a private disposition of 1,455,180 HF Sinclair Common Stock shares. The shares were sold back to the issuer at $68.72 per share under a Stock Purchase Agreement dated May 18, 2026, rather than through open-market trading.

At what price did REH Advisors Inc. sell HF Sinclair (DINO) shares to the issuer?

The shares were sold at $68.72 per HF Sinclair Common Stock share. This price applied to the entire 1,455,180-share block disposed of in the private transaction with the issuer, as described in the Stock Purchase Agreement dated May 18, 2026.

How many HF Sinclair (DINO) shares does REH Advisors Inc. hold after the reported transaction?

After the disposition, REH Advisors Inc. directly holds 11,256,662 HF Sinclair Common Stock shares. This figure reflects its ownership immediately following the private sale of 1,455,180 shares back to the issuer pursuant to the May 18, 2026 Stock Purchase Agreement.

Was REH Advisors Inc.’s HF Sinclair (DINO) share sale an open-market transaction?

No. The filing states the shares were sold by REH Advisors Inc. to HF Sinclair in a private transaction. The footnote specifies this occurred under a Stock Purchase Agreement between REH Advisors and the issuer dated May 18, 2026, not in open-market trading.

How is the Form 4 transaction for HF Sinclair (DINO) classified?

The transaction is classified with code “D,” meaning a disposition to the issuer. The Form 4 identifies it as a non-derivative transaction involving Common Stock and labels the action as an issuer disposition, reflecting a direct sale of shares back to HF Sinclair.

Who is the reporting person in this HF Sinclair (DINO) Form 4 filing?

The reporting person is REH Advisors Inc., identified as a director of HF Sinclair Corp. The filing shows its role as a board-level insider and reports its direct ownership of Common Stock before and after the private disposition to the issuer on May 18, 2026.