Attached files

file filename
EXCEL - IDEA: XBRL DOCUMENT - HollyFrontier CorpFinancial_Report.xls
EX-10.9 - EX-10.9 - HollyFrontier Corpd80514exv10w9.htm
EX-31.1 - EX-31.1 - HollyFrontier Corpd80514exv31w1.htm
EX-31.2 - EX-31.2 - HollyFrontier Corpd80514exv31w2.htm
EX-32.2 - EX-32.2 - HollyFrontier Corpd80514exv32w2.htm
EX-10.10 - EX-10.10 - HollyFrontier Corpd80514exv10w10.htm
10-Q - FORM 10-Q - HollyFrontier Corpd80514e10vq.htm
         
Exhibit 32.1
CERTIFICATION OF CHIEF EXECUTIVE
OFFICER OF HOLLY CORPORATION
PURSUANT TO 18 U.S.C. SECTION 1350
     In connection with the accompanying report on Form 10-Q for the quarterly period ended March 31, 2011 and filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Matthew P. Clifton, Chief Executive Officer of Holly Corporation (the “Company”) hereby certify, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:
1. The Report fully complies with the requirements of Section 13(a) or 15(d), as applicable, of the Securities Exchange Act of 1934; and
2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.
         
     
Date: May 6, 2011  /s/ Matthew P. Clifton    
  Matthew P. Clifton   
  Chief Executive Officer