HOLLYFRONTIER CORP Form DEFM14A: Definitive merger proxy statement
Filings on SEC EDGAR, newest first; amendments sit with their base form. Values are as filed.
- 2021-10-29: Form DEFM14A; Description DEFM14A; Document d232288ddefm14a.htm.
- 2011-05-24: Form DEFM14A; Description DEFM14A; Document d80547hdefm14a.htm.
| Filed | Form | Period of report | Description | Document |
|---|---|---|---|---|
| 2021-10-29 | DEFM14A | DEFM14A | d232288ddefm14a.htm | |
| 2011-05-24 | DEFM14A | DEFM14A | d80547hdefm14a.htm |