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SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Name of Issuer)

(Title of Class of Securities)

(CUSIP Number)

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

SCHEDULE 13D/A 0001351834 XXXXXXXX LIVE 8 Common Stock, par value $1.00 per share 11/17/2025 false 0000006176 032037103 Ampco-Pittsburgh Corporation 726 Bell Avenue, Suite 301 Carnegie PA 15106 Jennifer L. Gloff (412) 652-9480 The Louis Berkman Investment Company 600 Grant Street, Suite 3230 Pittsburgh PA 15219-2704 0001351834 N The Louis Berkman Investment Company WC BK N OH 3127792 0 3127792 0 3127792 N 15.39 CO Common Stock, par value $1.00 per share Ampco-Pittsburgh Corporation 726 Bell Avenue, Suite 301 Carnegie PA 15106 This Amendment No. 8 to Schedule 13D ("Amendment") amends and supplements the Schedule 13D filed on April 28, 2006 by The Louis Berkman Investment Company, an Ohio corporation ("LBIC"), with respect to the Common Stock, par value $1.00 per share ("Common Shares"), of the Ampco-Pittsburgh Corporation (the "Issuer"), as amended by Amendment No. 1 thereto filed on July 5, 2007, Amendment No. 2 thereto filed on December 26, 2007, Amendment No. 3 thereto filed on February 2, 2009, Amendment No. 4 thereto filed on April 10, 2018, Amendment No. 5 thereto filed on September 22, 2020, Amendment No. 6 thereto filed on March 1, 2022 and Amendment No. 7 thereto filed on November 28, 2022. The Louis Berkman Investment Company 600 Grant Street, Suite 3230, Pittsburgh, Pennsylvania 15219-2704 The Louis Berkman Investment Company ("LBIC") is an investment holding company incorporated in the state of Ohio. The names, addresses and principal occupations of the directors and executive officers of LBIC are set forth in Appendix A attached hereto. Such information is incorporation herein by reference. During the last five years, neither the Reporting Person nor any of the directors and executive officers of LBIC have been convicted in a criminal proceeding (excluding traffic violations or similar misdemeanors). During the last five years, neither the Reporting Person nor any of the directors and executive officers of LBIC have been a party to any civil proceeding of a judicial or administrative body of competent jurisdiction as a result of which he or she is subject to a judgment, decree or final order enjoining future violations of, or prohibiting or mandating activities subject to, federal or state securities laws or finding any violations with respect to such laws. All directors and executive officers of LBIC are citizens of the United States. The source of the funds for LBIC's purchase of the Common Shares (as further described in Item 4) consisted of $248,316.40 in cash. This Amendment is being filed to report the purchase by LBIC of 93,000 common shares of the Issuer ("Common Shares") for a weighted average of $2.67 per whole Common Share on November 17, 2025 for investment purposes. Except as set forth herein, the Reporting Person filing this Amendment has no plans or proposals that relate to or would result in any of the actions or events set forth in paragraphs (a) through (j) of Item 4 of Schedule 13D. The responses of the Reporting Person with respect to Rows 7, 8, 9, 10, 11 and 13 of the cover pages to this Schedule 13D are incorporated herein by reference. The responses of the Reporting Person with respect to Rows 7, 8, 9, 10, 11 and 13 of the cover pages to this Schedule 13D are incorporated herein by reference. Share percentage calculations in this Schedule are based on 20,326,389 Common Shares outstanding as of November 7, 2025 as reported in the Issuer's Quarterly Report filed with the SEC on November 12, 2025, including the share percentage calculation of the Reporting Person's 15.39% ownership. Purchase by LBIC of 93,000 Common Shares for a weighted average of $2.67 per whole Common Share on November 17, 2025 for investment purposes. As of the date of this report, Mr. Laurence Paul, a Director and President of LBIC, beneficially owns 84,368 Common Shares of the Issuer (excluding Common Shares owned by LBIC), which includes 12,728 shares of restricted stock of the Issuer. Mr. Laurence Paul has sole voting power over 84,368 shares and dispositive power over 71,640 shares. As of the date of this report, Mr. Stephen Paul, a Director of the Issuer and a Director and President of LBIC, beneficially owns 112,764 Common Shares of the Issuer (excluding Common Shares owned by LBIC). Mr. Stephen Paul has sole voting and dispositive powers over these 112,764 Common Shares. The Louis Berkman Investment Company /s/ Jennifer L. Gloff Jennifer L. Gloff, Chief Financial Officer and Treasurer 11/26/2025