HFC HollyFrontier Corporation

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K/A

CURRENT REPORT

Pursuant to Section 13 or 15(d)

of the Securities Exchange Act of 1934

Date of Report (Date of Earliest Event Reported): May 5, 2021 (May 4, 2021)

2828 N. Harwood, Suite 1300, Dallas, Texas 75201

(Address of Principal Executive Offices)

(214) 871-3555

(Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company  ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  ☐

EXPLANATORY NOTE

HollyFrontier Corporation (the “Company”) is filing this Amendment No. 1 on Form 8-K/A (this “Amendment No. 1”) to its Current Report on Form 8-K originally filed with the Securities and Exchange Commission on May 4, 2021 (the “Original Form 8-K”), solely to re-furnish Exhibit 99.2, “HollyFrontier Presentation to Investors regarding Puget Sound Refinery Acquisition,” to correct the ninth bullet on slide 5. Except as described above, this Amendment No. 1 does not amend, modify or update the information in the Original Form 8-K.

The information provided in Exhibit 99.2 shall not deemed to be “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended, nor shall it be incorporated by reference in any filing made by HollyFrontier pursuant to the Securities Act of 1933, as amended, other than to the extent that such filing incorporates by reference any or all of such information by express reference thereto.