HollyFrontier : Initial filing by director officer or owner of more than ten percent.

SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF

SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

3. Issuer Name and Ticker or Trading Symbol

HollyFrontier Corp [ HFC ]

4. Relationship of Reporting Person(s) to Issuer (Check all applicable)

X

Director

Officer (give title below)

10% Owner

Other (specify below)

Explanation of Responses:

Remarks:

Vaishali S. Bhatia Attorney-in-Fact Date

** Signature of Reporting PersonReminder: 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 5 (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.

02/15/2019

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.

POWER OF ATTORNEY

For Executing Forms ID, 3, 4 and 5 and Schedules 13D and 13G

Know all by these presents, that the undersigned hereby constitutes and appoints each of Denise Clark McWatters, Richard L. Voliva III and Vaishali S. Bhatia, signing singly, the undersigned's true and lawful attorney-in-fact to:

(1) prepare, execute and file, for and on behalf of the undersigned: (a) Forms ID, 3, 4 and 5 (including amendments thereto) in accordance with Section 16(a) of the Securities Exchange Act of 1934 and the rules thereunder; and (b) Schedules 13D and 13G (including amendments thereto) in accordance with Sections 13(d) and 13(g) of the Securities Exchange Agent of 1934 and the rules thereunder;

(2) 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, 3, 4 or 5 (including amendments thereto) or Schedule 13D or 13G (including amendments thereto) and timely file that Form or Schedule with the United States Securities and Exchange Commission 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

(3) 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 HollyFrontier 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 Securities Exchange Act of 1934 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 Securities Exchange Act of 1934, including without limitation the reporting requirements under Section 16 or Sections 13(d) or 13(g) thereunder.

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 HollyFrontier 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 executing, acknowledging, delivering or filing any Forms ID, 3, 4 or 5 (including amendments thereto) or Schedule 13D or 13G (including amendments thereto) and agrees to reimburse HollyFrontier 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 to file Forms ID, 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 HollyFrontier Corporation or its affiliates, 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 beexecuted as of the date written below.

/s/ R. Craig Knocke

R. Craig Knocke

Date: February 7, 2019