# EDGAR Filing Document

**Accession Number:** 0001507989
**File Stem:** 0001193125-25-280370
**Filing Date:** 2025-11
**Character Count:** 13916
**Document Hash:** eaec7e84554cf4cdd528c43504184c23
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-25-280370.hdr.sgml**: 20251113

**ACCESSION NUMBER**: 0001193125-25-280370

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 2

**CONFORMED PERIOD OF REPORT**: 20251112

**FILED AS OF DATE**: 20251113

**DATE AS OF CHANGE**: 20251113

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Kostelnik Robert J.
- **CENTRAL INDEX KEY:** 0001507989

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-41325
- **FILM NUMBER:** 251479359

**MAIL ADDRESS:**
- **STREET 1:** C/O HF SINCLAIR CORPORATION
- **STREET 2:** 2323 VICTORY AVE., SUITE 1400
- **CITY:** DALLAS
- **STATE:** TX
- **ZIP:** 75219
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** HF Sinclair Corp
- **CENTRAL INDEX KEY:** 0001915657
- **STANDARD INDUSTRIAL CLASSIFICATION:** PIPE LINES (NO NATURAL GAS) [4610]
- **ORGANIZATION NAME:** 01 Energy & Transportation
- **EIN:** 872092143
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** 2323 VICTORY AVENUE
- **STREET 2:** SUITE 1400
- **CITY:** DALLAS
- **STATE:** TX
- **ZIP:** 75219
- **BUSINESS PHONE:** 214-954-6696

**MAIL ADDRESS:**
- **STREET 1:** 2323 VICTORY AVENUE
- **STREET 2:** SUITE 1400
- **CITY:** DALLAS
- **STATE:** TX
- **ZIP:** 75219

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Hippo Parent Corp
- **DATE OF NAME CHANGE:** 20220307

## Ex-24.Poa

**POWER OF ATTORNEY<br>For Enrollment in the United States Securities and Exchange Commission's Electronic Data Gathering, Analysis and Retrieval (EDGAR) system and**

**Executing Form ID, Forms 3, 4 and 5 and Schedules 13D and 13G**<br>

Know all by these presents that, the undersigned hereby constitutes and appoints each of Atanas H. Atanasov, Eric L. Nitcher, Harrison Morris and Rita Townsend, signing singly, the undersigned's true and lawful attorney-in-fact to:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(1) obtain credentials (including codes or passwords) to enable the undersigned to submit and file documents, forms and information required by Section 16(a) of the Securities Exchange Act of 1934 and the rules thereunder (the "Exchange Act") or any rule or regulation of the U.S. Securities and Exchange Commission (the "SEC") via the Electronic Data Gathering and Retrieval ("EDGAR") system, including (i) prepare, execute and file, for and on behalf of the undersigned: (a) Form ID (Application for EDGAR Access) (including any renewal thereof); (b) Forms 3, 4 and 5 (including amendments thereto) in accordance with Section 16(a) of the Exchange Act; and (c) Schedules 13D and 13G (including amendments thereto) in accordance with Sections 13(d) and 13(g) of the Exchange Agent and (ii) enrolling the undersigned in EDGAR Next or any successor filing system;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(2) establish a new, complete enrollment of an existing and maintain in good standing, an EDGAR account with the SEC and act as account administrator for the undersigned's EDGAR account, including: (i) appointing, removing and replacing account administrators, technical administrators, account users and/or delegated users of such account; (ii) maintaining the security of the undersigned's EDGAR account, including modification of access codes; (iii) maintaining, modifying and certifying the accuracy of information on the undersigned's EDGAR account dashboard; and (iv) taking any other actions contemplated by Rule 10 of Regulation S-T;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(3) cause HF Sinclair Corporation to accept a delegation of authority from the undersigned's EDGAR account administrators and authorize such delegate's EDGAR account administrators pursuant to that delegated entity designation to appoint, remove or replace users for the undersigned's EDGAR account;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(4) do and perform any and all acts for and on behalf of the undersigned that may be necessary or desirable to prepare and execute any such Form ID (Application for EDGAR Access) (including any renewal thereof), Form 3, 4 or 5 (including amendments thereto) or Schedule 13D or 13G (including amendments thereto) and timely file that Form or Schedule with the SEC and any stock exchange or similar authority, and provide a copy as required by law or advisable to such persons as the attorney-in-fact deems appropriate; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(5) take any other action of any type whatsoever in connection with the foregoing that, in the opinion of the attorney-in-fact, may be of benefit to, in the best interest of, or legally required of the undersigned, it being understood that the documents executed by the attorney-in-fact on behalf of the undersigned pursuant to this Power of Attorney shall be in such form and shall contain such terms and conditions as the attorney-in-fact may approve in the attorney-in-fact's discretion.

The undersigned hereby grants to each such attorney-in-fact full power and authority to do and perform any and every act and thing whatsoever requisite, necessary, or proper to be done in the exercise of any of the rights and powers herein granted, as fully to all intents and purposes as the undersigned might or could do if personally present, with full power of substitution or revocation, hereby ratifying and confirming all that the attorney-in-fact, or the attorney-in-fact's substitute or substitutes, shall lawfully do or cause to be done by virtue of this Power of Attorney and the rights and powers herein granted. The undersigned acknowledges that the foregoing attorneys-in-fact, and their substitutes, in serving in such capacity at the request of the undersigned, are not assuming, nor is HF Sinclair Corporation or its affiliates assuming, (i) any of the undersigned's responsibilities to comply with Section 16 or Sections 13(d) or 13(g) of the Exchange Act or (ii) any liability of the undersigned for failure to comply with such requirements. This Power of Attorney does not relieve the undersigned from the undersigned's obligations to comply with the requirements of the Exchange Act, including without limitation the reporting requirements under Section 16 or Sections 13(d) or 13(g) thereunder or to maintain in good standing an EDGAR account with the SEC.

The undersigned agrees that each such attorney-in-fact may rely entirely on information furnished orally or in writing by or at the direction of the undersigned to the attorney-in-fact. The undersigned also agrees to indemnify and hold harmless HF Sinclair Corporation and its affiliates and each such attorney-in-fact against any losses, claims,

------

damages or liabilities (or actions in these respects) that arise out of or are based upon any untrue statements or omissions of necessary facts in the information provided by or at the direction of the undersigned, or upon the lack of timeliness in the delivery of information by or at the direction of the undersigned, to that attorney-in-fact for purposes of: (a) executing, acknowledging, delivering or filing any Form ID (Application for Edgar Access) (including any renewal thereof), Form 3, 4 or 5 (including amendments thereto) or Schedule 13D or 13G (including amendments thereto); and (b) establishing a new, completing enrollment of an existing and maintaining in good standing, an EDGAR account with the SEC, and agrees to reimburse HF Sinclair Corporation and its affiliates and the attorney-in-fact on demand for any legal or other expenses reasonably incurred in connection with investigating or defending against any such loss, claim, damage, liability or action.

This Power of Attorney shall remain in full force and effect until the undersigned is no longer required: (a) to file Form ID (Application for Edgar Access) (including any renewal thereof), Forms 3, 4 and 5 (including amendments thereto) and Schedules 13D and 13G (including amendments thereto) with respect to the undersigned's holdings of and transactions in securities issued by HF Sinclair Corporation or its affiliates; and/or (b) to maintain in good standing an EDGAR account for which HF Sinclair Corporation, its affiliates and/or the foregoing attorneys-in-fact act as administrator, technical administrator, user or delegated user, unless earlier revoked by the undersigned in a signed writing delivered to the foregoing attorneys-in-fact. This Power of Attorney does not revoke any other power of attorney that the undersigned has previously granted.

IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be executed as of the date written below.

<br><u>/s/ Robert J. Kostelnik</u> 

Robert J. Kostelnik

Date: <u>7/18/25</u> 

------

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## FORM 4

### STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

[ ] 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**<sup>*</sup><br>Kostelnik Robert J.<br><sub>(Last) (First) (Middle)</sub><br>2323 VICTORY AVENUE<br>SUITE 1400<br><sub>(Street)</sub><br>DALLAS, TX 75219<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2025-11-12 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[X] Director [ ] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>HF Sinclair Corp [ DINO ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | 3. Transaction Code (V) | 3. Transaction Code (V) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | Code | V | Amount | (A) or (D) | Price | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| Common Stock | 2025-11-12 |  | A |  | 2943 | A | 0<sup>(1)</sup> | 59598 | D |  |

---

## Table II - Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | 4. Transaction Code (V) | 4. Transaction Code (V) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 6. Date Exercisable and Expiration Date | 6. Date Exercisable and Expiration Date | 7. Title and Amount of Underlying Securities | 7. Title and Amount of Underlying Securities | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | Code | V | (A) | (D) | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

---

### Footnotes:

(1) Restricted stock units granted under the HF Sinclair Corporation Amended and Restated 2020 Long Term Incentive Plan. The restricted stock units are subject to restrictions that will lapse on December 1, 2026 (or on the first business day thereafter if such date falls on a weekend), provided the reporting person has served on the board of directors of the Issuer from the grant date until such vesting date. Unless settlement is deferred pursuant to the Issuer's deferred compensation arrangement for directors, the vested restricted stock units will be paid within 30 days following the vesting date in the form of the Issuer's common stock equal to the number of vested restricted stock units.

**Remarks:**
Exhibit List:  Exhibit 24-Power of Attorney

**Signature:** Harrison Morris Attorney-in-Fact for Robert J. Kostelnik  
**Date:** 2025-11-13

### Remarks:

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.**