Samuel Lyon - 15 May 2026 Form 4 Insider Report for AMPCO PITTSBURGH CORP (AP)

Reporting relationship: President of Union Electric
Issuer ticker: AP
Reported as of: 15 May 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 19 May 2026, 11:24:07 UTC
Prior SEC filing: 05 Mar 2026
Source filing: View source filing
Reporting owner signature: Kimberly P. Knox, attorney-in-fact

Key filing fact

Samuel Lyon filed Form 4 for AMPCO PITTSBURGH CORP (AP) on 19 May 2026.

Key facts

This page summarizes Samuel Lyon's Form 4 filing for AMPCO PITTSBURGH CORP (AP).
5 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 19 May 2026, 11:24.

Change

Previous filing in this sequence was filed on 05 Mar 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001747181 Primary reporting owner

Lyon Samuel

Relationship: President of Union Electric
Address: 726 BELL AVENUE, SUITE 301, CARNEGIE
Signature: Kimberly P. Knox, attorney-in-fact
Signature date: 19 May 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

AP transaction

Common Stock

Tax liability

Transaction value
Shares: -3,029
Change %: -1.5%
Price: $10.85^*
Shares after: 201,122
Date: 15 May 2026
Ownership: Direct
Footnotes: F1

AP transaction

Common Stock

Tax liability

Transaction value
Shares: -3,166
Change %: -1.6%
Price: $10.85^*
Shares after: 197,956
Date: 15 May 2026
Ownership: Direct
Footnotes: F2

AP transaction

Common Stock

Tax liability

Transaction value
Shares: -3,547
Change %: -1.8%
Price: $10.85^*
Shares after: 194,409
Date: 15 May 2026
Ownership: Direct
Footnotes: F3

AP transaction

Common Stock

Tax liability

Transaction value
Shares: -18,185
Change %: -9.4%
Price: $10.85^*
Shares after: 176,224
Date: 15 May 2026
Ownership: Direct
Footnotes: F4

AP transaction

Common Stock

Award

Transaction value
Shares: +15,056
Change %: +8.5%
Price: $0.000000^*
Shares after: 191,280
Date: 15 May 2026
Ownership: Direct
Footnotes: F5

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 5 footnotes

Footnote F1

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

Footnote F2

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

Footnote F3

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

Footnote F4

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

Footnote F5

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.