| Date Filed | Type | Description |
| 02/12/2021 |
SC 13G/A
| Form SC 13G/A - Statement of acquisition of beneficial ownership by individuals: [Amend] |
| 02/12/2021 |
SC 13G/A
| Form SC 13G/A - Statement of acquisition of beneficial ownership by individuals: [Amend] |
| 10/16/2020 |
EFFECT
| Form EFFECT - Notice of Effectiveness: |
| 10/14/2020 |
15-12B
| Form 15-12B - Securities registration termination [Section 12(b)]: |
| 10/09/2020 |
S-8 POS
| Form S-8 POS - Securities to be offered to employees in employee benefit plans, post-effective amendments: |
| 10/09/2020 |
S-8 POS
| Form S-8 POS - Securities to be offered to employees in employee benefit plans, post-effective amendments: |
| 10/09/2020 |
S-8 POS
| Form S-8 POS - Securities to be offered to employees in employee benefit plans, post-effective amendments: |
| 10/09/2020 |
POS AM
| Form POS AM - Post-Effective amendments for registration statement: |
| 09/01/2020 |
25-NSE
| Form 25-NSE - Notification filed by national security exchange to report the removal from listing and registration of matured, redeemed or retired securities: |
| 08/19/2020 |
8-K
| Quarterly results |
| 08/17/2020 |
10-Q
| Quarterly Report for the period ended June 30, 2020 |
| 08/17/2020 |
8-K
| Quarterly results |
| 08/17/2020 |
GN
| Chaparral Energy Executes Restructuring Support Agreement for Comprehensive Balance Sheet Restructuring, Launches Solicitation for Prepackaged Plan of Reorganization and Voluntarily Files for Chapter 11 |
| 08/10/2020 |
NT 10-Q
| Form NT 10-Q - Notification of inability to timely file Form 10-Q or 10-QSB: |
| 08/04/2020 |
8-K
| Quarterly results |
| 07/30/2020 |
8-K
| Quarterly results |
| 07/27/2020 |
8-K
| Quarterly results |
| 07/15/2020 |
8-K
| Quarterly results |
| 06/30/2020 |
8-K
| Quarterly results |
| 05/15/2020 |
DEF 14A
| Form DEF 14A - Other definitive proxy statements: |
| 05/11/2020 |
8-K
| Investor presentation |
| 05/11/2020 |
10-Q
| Quarterly Report for the period ended March 31, 2020 |
| 04/28/2020 |
10-K/A
| Annual Report for the period ended December 31, 2019 [amend] |
| 04/20/2020 |
8-K
| Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements... |
| 04/06/2020 |
8-K
| Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant |
| 03/11/2020 |
8-K
| Quarterly results |
| 03/11/2020 |
10-K
| Annual Report for the period ended December 31, 2019 |
| 03/05/2020 |
8-K
| Quarterly results |
| 02/14/2020 |
SC 13G/A
| Form SC 13G/A - Statement of acquisition of beneficial ownership by individuals: [Amend] |
| 02/14/2020 |
SC 13G/A
| Form SC 13G/A - Statement of acquisition of beneficial ownership by individuals: [Amend] |
| 02/14/2020 |
SC 13G/A
| Paloma Partners Management Co reports a 5.9% stake in Chaparral Energy, Inc. |
| 02/12/2020 |
SC 13G/A
| Form SC 13G/A - Statement of acquisition of beneficial ownership by individuals: [Amend] |
| 01/31/2020 |
8-K
| Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements... |
| 01/06/2020 |
8-K/A
| Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements... |
|