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Ownership stakes (13D / 13G)
Investors who own more than 5% of a company, from activists (13D) to passive holders (13G).
About this data
- What it is
- An investor who owns more than 5% of a public company must say so. Investors who may try to influence the company, such as activists, file the longer Schedule 13D; passive holders file the shorter Schedule 13G.
- Who files it
- The investor, within days of crossing 5%, and again whenever the stake changes materially.
- How current
- We collect new filings throughout the day on SEC business days.
- Worth knowing
- 13G filings are far more common than 13D. A 13D usually means the investor intends to push for changes, so it tends to get more attention.
All of this comes from public filings.
Source and freshness · Information, not investment advice (disclaimer).
Filings per day, last 30 days
13D (activist) 13G (passive)
Latest ownership filings
Showing: ticker AP
| Filed | ScheduleBoth report a stake of more than 5%. A 13D is filed by investors who may try to influence the company, such as activists; a 13G by passive holders. | Company | Investor | Shares | % of shares | Filing |
|---|---|---|---|---|---|---|
| Aug 14, 2026 | SCHEDULE 13G/A (amended) | AP Ampco-Pittsburgh Corporation | Columbia Management Investment Advisers, LLC | 905,679 | 4.5% | SCHEDULE 13G/A ↗ |
| Aug 14, 2026 | SCHEDULE 13G/A (amended) | AP Ampco-Pittsburgh Corporation | Ameriprise Financial, Inc. | 905,679 | 4.5% | SCHEDULE 13G/A ↗ |
| Jan 22, 2026 | SCHEDULE 13G/A (amended) | AP Ampco-Pittsburgh Corporation | Rutabaga Capital Management LLC/Ma | 0 | 0.0% | SCHEDULE 13G/A ↗ |
| Dec 19, 2025 | SCHEDULE 13D | AP Ampco-Pittsburgh Corporation | Bruce Galloway | 1.06M | 5.2% | SCHEDULE 13D ↗ |
| Dec 19, 2025 | SCHEDULE 13D | AP Ampco-Pittsburgh Corporation | Galloway Capital, LP | 1.06M | 5.2% | SCHEDULE 13D ↗ |
| Dec 19, 2025 | SCHEDULE 13D | AP Ampco-Pittsburgh Corporation | Galloway Capital Partners, LLC | 1.06M | 5.2% | SCHEDULE 13D ↗ |
| Nov 26, 2025 | SCHEDULE 13D/A (amended) | AP Ampco-Pittsburgh Corporation | The Louis Berkman Investment Company | 3.13M | 15.4% | SCHEDULE 13D/A ↗ |
| Nov 14, 2025 | SCHEDULE 13D/A (amended) | AP Ampco-Pittsburgh Corporation | Fredrick D. DiSanto | 857,065 | 4.2% | SCHEDULE 13D/A ↗ |
| Nov 14, 2025 | SCHEDULE 13D/A (amended) | AP Ampco-Pittsburgh Corporation | Ancora Holdings Group, LLC | 784,432 | 3.9% | SCHEDULE 13D/A ↗ |
| Nov 14, 2025 | SCHEDULE 13D/A (amended) | AP Ampco-Pittsburgh Corporation | Ancora Catalyst Institutional, LP | 360,790 | 1.8% | SCHEDULE 13D/A ↗ |
| Nov 14, 2025 | SCHEDULE 13D/A (amended) | AP Ampco-Pittsburgh Corporation | Ancora Catalyst, LP | 31,404 | 0.2% | SCHEDULE 13D/A ↗ |
| Nov 14, 2025 | SCHEDULE 13D/A (amended) | AP Ampco-Pittsburgh Corporation | Ancora Merlin Institutional, LP | 355,747 | 1.8% | SCHEDULE 13D/A ↗ |
| Nov 14, 2025 | SCHEDULE 13D/A (amended) | AP Ampco-Pittsburgh Corporation | Ancora Merlin, LP | 36,491 | 0.2% | SCHEDULE 13D/A ↗ |
| Nov 14, 2025 | SCHEDULE 13D/A (amended) | AP Ampco-Pittsburgh Corporation | Ancora Alternatives LLC | 784,432 | 3.9% | SCHEDULE 13D/A ↗ |
| Aug 4, 2025 | SCHEDULE 13D/A (amended) | AP Ampco-Pittsburgh Corporation | Mario J. Gabelli | 0 | 0.0% | SCHEDULE 13D/A ↗ |
| Aug 4, 2025 | SCHEDULE 13D/A (amended) | AP Ampco-Pittsburgh Corporation | Associated Capital Group, Inc. | 0 | 0.0% | SCHEDULE 13D/A ↗ |
| Aug 4, 2025 | SCHEDULE 13D/A (amended) | AP Ampco-Pittsburgh Corporation | GGCP, Inc. | 21,000 | 0.1% | SCHEDULE 13D/A ↗ |
| Aug 4, 2025 | SCHEDULE 13D/A (amended) | AP Ampco-Pittsburgh Corporation | Teton Advisors, Inc. | 112,000 | 0.6% | SCHEDULE 13D/A ↗ |
| Aug 4, 2025 | SCHEDULE 13D/A (amended) | AP Ampco-Pittsburgh Corporation | MJG Associates, Inc. | 10,000 | 0.1% | SCHEDULE 13D/A ↗ |
| Aug 4, 2025 | SCHEDULE 13D/A (amended) | AP Ampco-Pittsburgh Corporation | Gabelli Foundation, Inc. | 16,000 | 0.1% | SCHEDULE 13D/A ↗ |
| Aug 4, 2025 | SCHEDULE 13D/A (amended) | AP Ampco-Pittsburgh Corporation | GAMCO Asset Management Inc. | 2.41M | 12.0% | SCHEDULE 13D/A ↗ |
| Aug 4, 2025 | SCHEDULE 13D/A (amended) | AP Ampco-Pittsburgh Corporation | Gabelli Funds LLC | 1.37M | 6.8% | SCHEDULE 13D/A ↗ |
| Aug 4, 2025 | SCHEDULE 13D/A (amended) | AP Ampco-Pittsburgh Corporation | Gamco Investors, Inc. Et Al | 0 | 0.0% | SCHEDULE 13D/A ↗ |
| Feb 26, 2025 | SCHEDULE 13G | AP Ampco-Pittsburgh Corporation | Rutabaga Capital Management LLC/Ma | 1.14M | 5.7% | SCHEDULE 13G ↗ |
24 items, most recent first (up to 50). Every row links to its original filing. Updated Nov 15, 2026, 5:54 PM EST.
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