HOLLYFRONTIER CORP Form DEFA14A: Additional definitive proxy soliciting materials

Filings on SEC EDGAR, newest first; amendments sit with their base form. Values are as filed.

2021-11-30: Form DEFA14A; Description DEFA14A; Document d236416ddefa14a.htm.
2021-09-22: Form DEFA14A; Description DEFA14A; Document d220977ddefa14a.htm.
2021-09-22: Form DEFA14A; Description DEFA14A; Document d210110ddefa14a.htm.
2021-08-04: Form DEFA14A; Description DEFA14A; Document d211506ddefa14a.htm.

Filed	Form	Description	Document
2021-11-30	DEFA14A	DEFA14A	d236416ddefa14a.htm
2021-09-22	DEFA14A	DEFA14A	d220977ddefa14a.htm
2021-09-22	DEFA14A	DEFA14A	d210110ddefa14a.htm
2021-08-04	DEFA14A	DEFA14A	d211506ddefa14a.htm
2021-08-03	DEFA14A	DEFA14A	d186843ddefa14a.htm
2021-03-25	DEFA14A	DEFA14A	d93818ddefa14a.htm
2020-04-09	DEFA14A	DEFA14A	d908862ddefa14a.htm
2020-03-26	DEFA14A	DEFA14A	d791726ddefa14a.htm
2019-03-21	DEFA14A	DEFA14A	d682044ddefa14a.htm
2018-04-11	DEFA14A	DEFA14A	a2018proxysupplementrev.htm
2018-03-22	DEFA14A	DEFA14A	d550368ddefa14a.htm
2017-03-23	DEFA14A	DEFA14A	d281241ddefa14a.htm
2016-03-24	DEFA14A	DEFA14A	d123257ddefa14a.htm
2015-03-26	DEFA14A	DEFINITIVE ADDITIONAL MATERIALS	d873497ddefa14a.htm
2014-03-27	DEFA14A	DEFINITIVE ADDITIONAL MATERIALS	d675864ddefa14a.htm
2013-03-28	DEFA14A	DEFA14A	d500018ddefa14a.htm
2012-05-10	DEFA14A	Additional definitive proxy soliciting materials	a14acicamendments.htm
2012-03-30	DEFA14A	DEFINITIVE ADDITIONAL MATERIALS	d318722ddefa14a.htm
2011-03-31	DEFA14A	DEFA14A	d80545amdefa14a.htm
2010-03-25	DEFA14A	DEFA14A	d71587dadefa14a.htm