$HollyFrontier Corporation(HFC)$ 8-K - Current report Filed: 2017-11-07 AccNo: 0000048039-17-000055 Size: 33 KBItem 5.02: Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain OfficersItem 7.01: Regulation FD DisclosureItem 9. 网页链接