Filing Manager
VANGUARD GROUP INC
Reporting Manager
The Vanguard Group
Symbol
AMPX
Shares outstanding
125,242,692 shares
Disclosed Ownership
6,512,620 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% 6,512,620 0 823,477 Ashley Grim Head of Global Fund Administration