Ampco Pittsburgh Corp
AP- Exchange
- NYSE
- Industry
- Pumps & Pumping Equipment
- SEC CIK
- 0000006176
No open-market purchases or sales by Ampco Pittsburgh Corp insiders were filed in the last 90 days; 85 institutions reported holding it in 13F filings for Q2 2026, worth $99.5M in total; no superinvestor holds it.
Holders of 5% or more of AP
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Ampco Pittsburgh Corp, largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| Louis Berkman Investment CO | 13D/A | 15.39%3.13M shares | – | Nov 26, 20251 filing | Nov 26, 2025 | SEC |
| Gamco Investors, Inc. Et Al | 13D/A | 12.00%2.41M shares | – | Aug 4, 20251 filing | Aug 4, 2025 | SEC |
| Galloway Capital Partners, LLC | 13D | 5.19%1.06M shares | New | Dec 19, 20251 filing | Dec 19, 2025 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
6 Schedule 13D and 13G filings on Ampco Pittsburgh Corp, newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Jan 22, 202610:52 AM ET | Rutabaga Capital Management LLC | 13G/A | 0.00%0 shares | −5.70 ppfrom 5.70%Below 5% | Dec 31, 2025 | SEC |
| Dec 19, 20258:54 AM ET | Galloway Capital Partners, LLCand 2 others | 13D | 5.19%1.06M shares | New | Dec 17, 2025 | SEC |
| Nov 26, 20256:27 PM ET | Louis Berkman Investment CO | 13D/A | 15.39%3.13M shares | – | Nov 17, 2025 | SEC |
| Nov 14, 20255:40 PM ET | Ancora Alternatives LLCand 6 others | 13D/A | 4.20%857.1K shares | –Below 5% | Nov 13, 2025 | SEC |
| Aug 4, 20254:06 PM ET | Gamco Investors, Inc. Et Aland 8 others | 13D/A | 12.00%2.41M shares | – | Aug 1, 2025 | SEC |
| Feb 26, 202511:51 AM ET | Rutabaga Capital Management LLC | 13G | 5.70%1.14M shares | New | Sep 30, 2024 | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell Ampco Pittsburgh Corp shares.
No Form 144 notices for Ampco Pittsburgh Corp are on file.