AP · Ampco Pittsburgh Corp

Represents a grant of restricted stock under the Ampco-Pittsburgh Corporation 2016 Omnibus Incentive Plan, as amended and restated May 8, 2025. These grants of restricted stock vest on the first anniversary of the grant date.

Represents the payment of tax liability by withholding shares incident to the vesting of the performance-based restricted stock units.

Represents the payment of tax liability by withholding shares incident to the vesting of the 2025 grant of Restricted Stock Units.

Represents a grant of restricted stock under the Ampco-Pittsburgh Corporation 2016 Omnibus Incentive Plan, as amended and restated May 8, 2025. These grants of restricted stock vest on the first anniversary of the grant date.

Represents a grant of restricted stock under the Ampco-Pittsburgh Corporation 2016 Omnibus Incentive Plan, as amended and restated May 8, 2025. These grants of restricted stock vest on the first anniversary of the grant date.

Represents the payment of tax liability by withholding shares incident to the vesting of the 2025 grant of Restricted Stock Units.

Represents a grant of restricted stock under the Ampco-Pittsburgh Corporation 2016 Omnibus Incentive Plan, as amended and restated May 8, 2025. These grants of restricted stock vest on the first anniversary of the grant date.

Represents the payment of tax liability by withholding shares incident to the vesting of the 2025 grant of Restricted Stock Units.

Represents the payment of tax liability by withholding shares incident to the vesting of the performance-based restricted stock units.

Represents a grant of restricted stock units under the Ampco-Pittsburgh Corporation ("Company") 2016 Omnibus Incentive Plan, as amended and restated as of May 8, 2025. Each restricted stock unit represents the contingent right to receive upon vesting of the unit, one share of the Company's common stock. Restricted stock units vest in three equal annual installments beginning on the first anniversary of the grant date.

Represents a grant of restricted stock units under the Ampco-Pittsburgh Corporation ("Company") 2016 Omnibus Incentive Plan, as amended and restated as of May 8, 2025. Each restricted stock unit represents the contingent right to receive upon vesting of the unit, one share of the Company's common stock. Restricted stock units vest in three equal annual installments beginning on the first anniversary of the grant date.

Represents a grant of restricted stock under the Ampco-Pittsburgh Corporation 2016 Omnibus Incentive Plan, as amended and restated May 8, 2025. These grants of restricted stock vest on the first anniversary of the grant date.

Represents the payment of tax liability by withholding shares incident to the vesting of the 2023 grant of Restricted Stock Units.

Represents the payment of tax liability by withholding shares incident to the vesting of the performance-based restricted stock units.

Represents the payment of tax liability by withholding shares incident to the vesting of the 2024 grant of Restricted Stock Units.

Represents the payment of tax liability by withholding shares incident to the vesting of the 2024 grant of Restricted Stock Units.

Represents the payment of tax liability by withholding shares incident to the vesting of the 2024 grant of Restricted Stock Units.

Represents a grant of restricted stock under the Ampco-Pittsburgh Corporation 2016 Omnibus Incentive Plan, as amended and restated May 8, 2025. These grants of restricted stock vest on the first anniversary of the grant date.

Represents the payment of tax liability by withholding shares incident to the vesting of the 2023 grant of Restricted Stock Units.

Represents a grant of restricted stock units under the Ampco-Pittsburgh Corporation ("Company") 2016 Omnibus Incentive Plan, as amended and restated as of May 8, 2025. Each restricted stock unit represents the contingent right to receive upon vesting of the unit, one share of the Company's common stock. Restricted stock units vest in three equal annual installments beginning on the first anniversary of the grant date.

Represents the payment of tax liability by withholding shares incident to the vesting of the 2023 grant of Restricted Stock Units.

These shares represent shares to be issued in connection with the satisfaction of performance requirements based on Ampco-Pittsburgh Corporation's achievement of targeted Relative Total Shareholder Return. The vesting of these shares is contingent on the Reporting Person's continued service to the Issuer through May 15, 2026.

These shares represent shares to be issued in connection with the satisfaction of performance requirements based on Ampco-Pittsburgh Corporation's achievement of targeted Relative Total Shareholder Return. The vesting of these shares is contingent on the Reporting Person's continued service to the Issuer through May 15, 2026.

These shares represent shares to be issued in connection with the satisfaction of performance requirements based on Ampco-Pittsburgh Corporation's achievement of targeted Relative Total Shareholder Return. The vesting of these shares is contingent on the Reporting Person's continued service to the Issuer through May 15, 2026.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $2.70 to $2.57, inclusive. The reporting person undertakes to provide to any security holder of Ampco-Pittsburgh Corporation or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in footnote (1) to this Form 4.

Represents the payment of tax liability by withholding shares incident to the vesting of the 2024 grant of Restricted Stock Units.

Represents a grant of restricted stock under the Ampco-Pittsburgh Corporation 2016 Omnibus Incentive Plan, as amended and restated May 8, 2025. These grants of restricted stock vest on the first anniversary of the grant date.

Represents a grant of restricted stock units under the Ampco-Pittsburgh Corporation ("Company") 2016 Omnibus Incentive Plan, as amended and restated as of May 8, 2025. Each restricted stock unit represents the contingent right to receive upon vesting of the unit, one share of the Company's common stock. Restricted stock units vest in three equal annual installments beginning on the first anniversary of the grant date.

Represents the payment of tax liability by withholding shares incident to the vesting of the 2023 grant of Restricted Stock Units.

Represents a grant of restricted stock under the Ampco-Pittsburgh Corporation 2016 Omnibus Incentive Plan, as amended and restated May 8, 2025. These grants of restricted stock vest on the first anniversary of the grant date.

Represents the payment of tax liability by withholding shares incident to the vesting of the 2024 grant of Restricted Stock Units.

Represents a grant of restricted stock under the Ampco-Pittsburgh Corporation 2016 Omnibus Incentive Plan, as amended and restated May 8, 2025. These grants of restricted stock vest on the first anniversary of the grant date.

Represents a grant of restricted stock units under the Ampco-Pittsburgh Corporation ("Company") 2016 Omnibus Incentive Plan, as amended and restated as of May 8, 2025. Each restricted stock unit represents the contingent right to receive upon vesting of the unit, one share of the Company's common stock. Restricted stock units vest in three equal annual installments beginning on the first anniversary of the grant date.

Represents a grant of restricted stock units under the Ampco-Pittsburgh Corporation ("Company") 2016 Omnibus Incentive Plan, as amended and restated as of May 8, 2025. Each restricted stock unit represents the contingent right to receive upon vesting of the unit, one share of the Company's common stock. Restricted stock units vest in three equal annual installments beginning on the first anniversary of the grant date.

Each performance right represents a contingent right to receive one share of common stock of the Company. The number of securities reported in Table II, column 5 of this Form 4 represents the target payout of the award. The number of shares of common stock payable upon vesting of the award, which will occur on May 15, 2028, could range from 0% to 200% of target, if and to the extent that the Company's stock price reaches specified levels during the performance period ending on December 31, 2027.

Each performance right represents a contingent right to receive one share of common stock of the Company. The number of securities reported in Table II, column 5 of this Form 4 represents the target payout of the award. The number of shares of common stock payable upon vesting of the award, which will occur on May 15, 2028, could range from 0% to 200% of target, if and to the extent that the Company's stock price reaches specified levels during the performance period ending on December 31, 2027.

Represents a grant of restricted stock under the Ampco-Pittsburgh Corporation 2016 Omnibus Incentive Plan, as amended and restated May 8, 2025. These grants of restricted stock vest on the first anniversary of the grant date.

Represents the payment of tax liability by withholding shares incident to the vesting of the performance-based restricted stock units.

Represents the payment of tax liability by withholding shares incident to the vesting of the 2024 grant of Restricted Stock Units.

Represents a grant of restricted stock under the Ampco-Pittsburgh Corporation 2016 Omnibus Incentive Plan, as amended and restated May 8, 2025. These grants of restricted stock vest on the first anniversary of the grant date.

Represents a grant of restricted stock under the Ampco-Pittsburgh Corporation 2016 Omnibus Incentive Plan, as amended and restated May 8, 2025. These grants of restricted stock vest on the first anniversary of the grant date.

Represents a grant of restricted stock units under the Ampco-Pittsburgh Corporation ("Company") 2016 Omnibus Incentive Plan, as amended and restated as of May 8, 2025. Each restricted stock unit represents the contingent right to receive upon vesting of the unit, one share of the Company's common stock. Restricted stock units vest in three equal annual installments beginning on the first anniversary of the grant date.