Filing Manager
VANGUARD GROUP INC
Reporting Manager
The Vanguard Group
Symbol
AMPX
Shares outstanding
125M shares
Disclosed Ownership
6.51M shares
Ownership
5.2%
Form type
SCHEDULE 13G
Filing time
30 Oct 2025, 14:04:16 UTC
Date of event
30 Sep 2025

Reporting Managers (1)

Name Ownership Shares Owned sole voting power shared voting power Signature Title CIK
The Vanguard Group 5.2% 6.51M 0 823K Ashley Grim Head of Global Fund Administration