$Chaparral Energy(CHAP)$ 8-K - Current report Filed: 2019-04-15 AccNo: 0001193125-19-106620 Size: 35 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 9.01: Financial Statements and Exhibits 网页链接