$Chaparral Energy(CHAP)$ 8-K/A [Amend] - Current report Filed: 2019-04-23 AccNo: 0001193125-19-115067 Size: 131 KBItem 5.02: Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain OfficersItem 9.01: Financial Statements and Exhibits 网页链接