X0306 4 2022-05-09 0 0000006176 AMPCO PITTSBURGH CORP AP 0001612993 McAuley Michael G 726 BELL AVENUE SUITE 301 CARNEGIE PA 15106 0 1 0 0 V.P., CFO & Treasurer Common Stock 2022-05-09 4 F 0 925 5.55 D 89222 D Common Stock 2022-05-09 4 A 0 17543 0.00 A 106765 D Common Stock 2022-05-09 4 F 0 4997 5.55 D 101768 D Represents the payment of tax liability by withholding shares incident to the vesting of the 2019 grant of Restricted Stock Units. These shares were acquired upon vesting of performance-based restricted stock units. The vesting of these performance-based restricted stock units was based on Ampco-Pittsburgh Corporation's achievement of targeted Relative Total Shareholder Return. Represents the payment of tax liability by withholding shares incident to the vesting of the performance-based restricted stock units. /s/Melanie L. Sprowson, attorney-in-fact 2022-05-11