HollyFrontier Corp — DEF 14A

HollyFrontier Corp of DALLAS, TX filed a DEF 14A with the SEC on 1997-11-03. Industry: Petroleum Refining.

Filing

Filing timeline for this registrant (57)

Showing 12 of 57 filings.

FiledForm
2021-11-30DEFA14A
2021-10-29DEFM14A
2021-09-22DEFA14A
2021-09-22DEFA14A
2021-09-17PREM14A
2021-08-04DEFA14A
2021-08-03DEFA14A
2021-03-25DEFA14A
2021-03-25DEF 14A
2020-04-09DEFA14A
2020-03-26DEFA14A
2020-03-26DEF 14A

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