Attached files
file | filename |
---|---|
EX-10.9 - EX-10.9 - HollyFrontier Corp | ex109first_amendmentxtoxse.htm |
EX-32.2 - EX-32.2 - HollyFrontier Corp | hfcex3223-31x2021.htm |
EX-32.1 - EX-32.1 - HollyFrontier Corp | hfcex3213-31x2021.htm |
EX-31.2 - EX-31.2 - HollyFrontier Corp | hfcex3123-31x2021.htm |
EX-31.1 - EX-31.1 - HollyFrontier Corp | hfcex3113-31x2021.htm |
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