Louis Berkman Investment CO - 17 Nov 2025 SCHEDULE 13D/A Report for Ampco-Pittsburgh Corporation Common Stock, par value $1.00 per share (AP)

Filing Manager: Louis Berkman Investment CO
Reporting Manager: The Louis Berkman Investment Company
Security: Ampco-Pittsburgh Corporation Common Stock, par value $1.00 per share
Symbol: AP
Shares outstanding: 20,323,535 shares
Disclosed Ownership: 3,127,792 shares
Ownership: 15.4%
Form type: SCHEDULE 13D/A
Filing time: 26 Nov 2025, 18:27:52 UTC
Date of event: 17 Nov 2025
SEC: View on sec.gov

Reporting Managers (1)

Name	Ownership	Shares Owned	sole voting power	shared voting power	Signature	Title	CIK
The Louis Berkman Investment Company	15.39%	3,127,792	3,127,792	0	/s/ Jennifer L. Gloff	Jennifer L. Gloff, Chief Financial Officer and Treasurer	0001351834