Attached files

file filename
EX-10.9 - EX-10.9 - HollyFrontier Corpex109first_amendmentxtoxse.htm
EX-32.2 - EX-32.2 - HollyFrontier Corphfcex3223-31x2021.htm
EX-32.1 - EX-32.1 - HollyFrontier Corphfcex3213-31x2021.htm
EX-31.2 - EX-31.2 - HollyFrontier Corphfcex3123-31x2021.htm
EX-31.1 - EX-31.1 - HollyFrontier Corphfcex3113-31x2021.htm
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