Filing Manager
Stoney Lonesome HF LP
Reporting Manager
Stoney Lonesome HF LP
Symbol
AMPY
Shares outstanding
40.3M shares
Disclosed Ownership
2.7M shares
Ownership
6.7%
Form type
SCHEDULE 13D/A
Date filed
5/20/2025, 10:27 AM
Date of event
May 16, 2025
Previous filing
Apr 16, 2025
Next filing
Jun 6, 2025

Reporting Managers (3)

Name Ownership Shares Owned sole voting power shared voting power Signature Title CIK
Stoney Lonesome HF LP 6.7% 2.7M 2.7M 0 /s/Clint Coghill Clint Coghill/President of General Partner 0002014854
The Drake Helix Holdings, LLC 0.2% 83K 83K 0 /s/Clint Coghill Clint Coghill/President
Clint Coghill 0% 2.41K 2.41K 0 /s/Clint Coghill Clint Coghill