As of November 6, 2026, 3 holders' latest Schedule 13D or 13G filings report owning 5% or more of Ampco-Pittsburgh Corporation. The largest reported stake is The Louis Berkman Investment Company's, at 15.39%. 6 filings are on record since August 4, 2025 (Schedule 13D/A, November 26, 2025).
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Key facts
- · Reporting person: Ameriprise Financial, Inc. · Sole voting: 0 · Shared voting: 905,679 · Sole dispositive: 0 · Shared dispositive: 905,679 · SCHEDULE 13G/A, 2026-08-14
- · Holder: Rutabaga Capital Management LLC · Percent: 0% · SCHEDULE 13G/A
- · Holder: Galloway Capital Partners, LLC · Percent: 5.19% · SCHEDULE 13D
- · Holder: The Louis Berkman Investment Company · Percent: 15.39% · SCHEDULE 13D/A
- · Holder: Ancora Alternatives LLC · Percent: 4.2% · SCHEDULE 13D/A
Ampco-Pittsburgh Corporation has 6 Schedule 13D or 13G filings on record since 2025-08-04. 3 holders' latest filing reports 5% or more of common stock. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| The Louis Berkman Investment Company | 15.39% | 3,127,792 | SCHEDULE 13D/A, 2025-11-26 | 2025-11-17 |
| Gamco Investors, Inc. Et Al | 12% | 0 | SCHEDULE 13D/A, 2025-08-04 | 2025-08-01 |
| Galloway Capital Partners, LLC | 5.19% | 1,056,200 | SCHEDULE 13D, 2025-12-19 | 2025-12-17 |
| Ameriprise Financial, Inc. | 4.5% | 905,679 | SCHEDULE 13G/A, 2026-08-14 | 2026-06-30 |
| Ancora Alternatives LLC | 4.2% | 784,432 | SCHEDULE 13D/A, 2025-11-14 | 2025-11-13 |
| Rutabaga Capital Management LLC | 0% | 0 | SCHEDULE 13G/A, 2026-01-22 | 2025-12-31 |
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More on Ampco-Pittsburgh Corporation and the records around it.
Ampco-Pittsburgh Corporation elsewhere on the record
Companies that share a holder
- Galloway Capital Partners, LLC also filed stake reports on 8 other companies: PodcastOne, Inc. (Oct 2026), WW INTERNATIONAL, INC. (May 2026), Global Crossing Airlines Group Inc. (Apr 2026)
- GAMCO INVESTORS, INC. ET AL also filed stake reports on 45 other companies: WESTWOOD HOLDINGS GROUP INC (Nov 2026), NATHANS FAMOUS, INC. (Oct 2026), BEASLEY BROADCAST GROUP INC (Oct 2026)
- Ameriprise Financial, Inc. also filed stake reports on 65 other companies: Universal Electronics Inc. (Sep 2026), America's Car-Mart, Inc. (Aug 2026), Babcock & Wilcox Enterprises, Inc. (Aug 2026)
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Voting and dispositive power, as filed
| Reporting person | Sole voting | Shared voting | Sole dispositive | Shared dispositive | Filing |
|---|---|---|---|---|---|
| Ameriprise Financial, Inc. | 0 | 905,679 | 0 | 905,679 | SCHEDULE 13G/A, 2026-08-14 |
| Columbia Management Investment Advisers, LLC | 0 | 905,679 | 0 | 905,679 | SCHEDULE 13G/A, 2026-08-14 |
The latest filing identifies Ampco-Pittsburgh Corporation by CUSIP 032037103 and gives its principal executive office as 726 Bell Avenue, Suite 301, Carnegie, PA 15106 (SCHEDULE 13G/A, 2026-08-14).
Purpose of Transaction (Item 4)
The Louis Berkman Investment Company
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.Item 4 of the SCHEDULE 13D/A filed 2025-11-26
Galloway Capital Partners, LLC
Each Reporting Person acquired the securities described in this Schedule 13D for investment purposes and intend to review its investment in the Issuer on a continuing basis. Each Reporting Person may from time to time acquire additional securities of the Issuer or retain or sell all or a portion of the shares then held by such Reporting Person, in the open market, block trades, underwritten public offerings or privately negotiated transactions. Any actions any Reporting Person might undertake with respect to its investment in the Issuer may be made at any time and from time to time and will be dependent upon such Reporting Person's review of numerous factors, including, but not limited to: ongoing evaluation of the Issuer's business, financial condition, operations, prospects and strategic alternatives; price levels of the Issuer's securities; general market, industry and economic conditions; the relative attractiveness of alternative business and investment opportunities; tax considerations; liquidity of the Issuer's securities; and other factors and future developments. Each Reporting Person may consider, explore and/or develop plans and/or make proposals (whether preliminary or final) with respect to, among other things, the Issuer's performance, operations, management, governance (including potential changes to the Board), conflicted party transactions, capital allocation policies, and strategy and plans of the Issuer. Each Reporting Person intends to engage the Board …The first part of Item 4 of the SCHEDULE 13D filed 2025-12-19; the filing has the rest
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-08-04 | Gamco Investors, Inc. Et Al | 12% | SCHEDULE 13D/A |
| 2025-11-14 | Ancora Alternatives LLC | 4.2% | SCHEDULE 13D/A |
| 2025-11-26 | The Louis Berkman Investment Company | 15.39% | SCHEDULE 13D/A |
| 2025-12-19 | Galloway Capital Partners, LLC | 5.19% | SCHEDULE 13D |
| 2026-01-22 | Rutabaga Capital Management LLC | 0% | SCHEDULE 13G/A |
| 2026-08-14 | Ameriprise Financial, Inc. | 4.5% | SCHEDULE 13G/A |
Questions about who owns Ampco-Pittsburgh Corporation
Who owns Ampco-Pittsburgh Corporation?
On this page, 3 holders' latest ownership filings report 5% or more of Ampco-Pittsburgh Corporation: The Louis Berkman Investment Company (15.39%, Schedule 13D/A, filed 2025-11-26), Gamco Investors, Inc. Et Al (12%, Schedule 13D/A, filed 2025-08-04) and Galloway Capital Partners, LLC (5.19%, Schedule 13D, filed 2025-12-19).
Who are the largest shareholders of Ampco-Pittsburgh Corporation?
By the share each holder's latest filing reports, the largest holders of Ampco-Pittsburgh Corporation on this page are The Louis Berkman Investment Company (15.39%), Gamco Investors, Inc. Et Al (12%) and Galloway Capital Partners, LLC (5.19%).
When did The Louis Berkman Investment Company buy into Ampco-Pittsburgh Corporation?
The filings give report dates, not purchase dates. The earliest filing from The Louis Berkman Investment Company on this page is the Schedule 13D/A, filed 2025-11-26, reporting 15.39%. That earliest filing is itself an amendment, which updates an earlier report.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 6 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
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Where this comes from
Anyone who comes to own more than 5% of a class of a listed company's voting shares has to tell the SEC. A holder who may seek to change or influence the company files Schedule 13D, and has to say in Item 4, "Purpose of Transaction", what it intends to do. A holder with no such intent, such as many index and passive funds, may file the shorter Schedule 13G. Both are amended when the stake changes, including when it falls below 5%.
Every row here is one of those filings, linked to the filing itself. Percentages and share counts are exactly as the holder filed them, for the holder the filing names; an amendment showing a lower figure is shown as filed. Item 4 text is quoted word for word. Where a 13D's Item 4 contains a sentence stating a definite intent to influence the company, that sentence is marked and quoted; the page does not describe the holder or its motives beyond the words it filed. Nothing here is investment advice.