AP Ampco-Pittsburgh Corporation
Ampco-Pittsburgh Corporation (AP) Institutional Ownership
What the institutions did with AP last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| GAMCO INVESTORS, INC. ET AL | 2.5M | 21.4% |
| GABELLI FUNDS LLC | 1.4M | 12.1% |
| BlackRock, Inc. | 982.6K | 8.5% |
| AMERIPRISE FINANCIAL INC | 905.7K | 7.9% |
| WELLS FARGO & COMPANY/MN | 660.9K | 5.7% |
| VANGUARD CAPITAL MANAGEMENT LLC | 604.1K | 5.2% |
| RENAISSANCE TECHNOLOGIES LLC | 414.4K | 3.6% |
| GEODE CAPITAL MANAGEMENT, LLC | 342.8K | 3.0% |
| AMERICAN CENTURY COMPANIES INC | 328.8K | 2.9% |
| DIMENSIONAL FUND ADVISORS LP | 295.4K | 2.6% |
| Meros Investment Management, LP | 239.9K | 2.1% |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | 195.3K | 1.7% |
| ACADIAN ASSET MANAGEMENT LLC | 191.0K | 1.7% |
| O'SHAUGHNESSY ASSET MANAGEMENT, LLC | 174.3K | 1.5% |
| STATE STREET CORP | 159.3K | 1.4% |
| JANE STREET GROUP, LLC | 150.4K | 1.3% |
| Huntleigh Advisors, Inc. | 141.2K | 1.2% |
| RITHOLTZ WEALTH MANAGEMENT | 132.9K | 1.2% |
| Teton Advisors, LLC | 130.0K | 1.1% |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | 125.4K | 1.1% |
| NORTHERN TRUST CORP | 121.5K | 1.1% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 112.7K | 1.0% |
| GOLDMAN SACHS GROUP INC | 100.7K | 0.9% |
| VANGUARD FIDUCIARY TRUST CO | 92.9K | 0.8% |
| Informed Momentum Co LLC | 90.1K | 0.8% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| BlackRock, Inc. | Increased | 203.1K | 982.6K | +779.5K |
| AMERIPRISE FINANCIAL INC | Reduced | 1.2M | 905.7K | -267.3K |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 135.1K | 342.8K | +207.8K |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Increased | 26.6K | 195.3K | +168.7K |
| MILLENNIUM MANAGEMENT LLC | Reduced | 160.4K | 19.8K | -140.6K |
| SEI INVESTMENTS CO | Reduced | 184.3K | 65.9K | -118.4K |
| VANGUARD PORTFOLIO MANAGEMENT LLC | New | 0 | 112.7K | +112.7K |
| AMERICAN CENTURY COMPANIES INC | Increased | 218.9K | 328.8K | +110.0K |
| ACADIAN ASSET MANAGEMENT LLC | Increased | 83.6K | 191.0K | +107.4K |
| STATE STREET CORP | Increased | 59.4K | 159.3K | +99.9K |
| NORTHERN TRUST CORP | Increased | 28.4K | 121.5K | +93.1K |
| Huntleigh Advisors, Inc. | Reduced | 230.5K | 141.2K | -89.3K |
| MARSHALL WACE, LLP | Reduced | 161.3K | 80.4K | -80.9K |
| Palumbo Wealth Management LLC | Increased | 15.2K | 79.2K | +64.0K |
| RBF Capital, LLC | Sold Out | 60.0K | 0 | -60.0K |
| GOLDMAN SACHS GROUP INC | Increased | 40.7K | 100.7K | +60.0K |
| DIMENSIONAL FUND ADVISORS LP | Reduced | 355.4K | 295.4K | -60.0K |
| PANAGORA ASSET MANAGEMENT INC | New | 0 | 52.4K | +52.4K |
| O'SHAUGHNESSY ASSET MANAGEMENT, LLC | Increased | 122.4K | 174.3K | +51.9K |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | New | 0 | 39.4K | +39.4K |
| CITADEL ADVISORS LLC | Increased | 14.4K | 51.4K | +37.0K |
| Bank of New York Mellon Corp | New | 0 | 34.0K | +34.0K |
| Qube Research & Technologies Ltd | New | 0 | 32.2K | +32.2K |
| GAMCO INVESTORS, INC. ET AL | Reduced | 2.5M | 2.5M | -32.1K |
| Dynamic Technology Lab Private Ltd | New | 0 | 30.4K | +30.4K |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | Reduced | 154.4K | 125.4K | -29.0K |
| Hudson Bay Capital Management LP | Sold Out | 27.1K | 0 | -27.1K |
| Informed Momentum Co LLC | Reduced | 115.8K | 90.1K | -25.7K |
| Meros Investment Management, LP | Increased | 214.9K | 239.9K | +25.1K |
| OCCUDO QUANTITATIVE STRATEGIES LP | New | 0 | 24.9K | +24.9K |
| XTX Topco Ltd | Reduced | 48.6K | 24.0K | -24.6K |
| Nuveen, LLC | New | 0 | 21.4K | +21.4K |
| SIMPLEX TRADING, LLC | Sold Out | 20.2K | 0 | -20.2K |
| VANGUARD FIDUCIARY TRUST CO | Increased | 72.8K | 92.9K | +20.1K |
| OMERS ADMINISTRATION Corp | Sold Out | 19.3K | 0 | -19.3K |
| HRT FINANCIAL LP | Sold Out | 18.6K | 0 | -18.6K |
| JANE STREET GROUP, LLC | Reduced | 168.3K | 150.4K | -17.9K |
| ALGERT GLOBAL LLC | Reduced | 28.9K | 11.6K | -17.3K |
| DEUTSCHE BANK AG\ | New | 0 | 16.1K | +16.1K |
| RAFFLES ASSOCIATES LP | Increased | 15.0K | 30.0K | +15.0K |
| Graham Capital Management, L.P. | New | 0 | 14.8K | +14.8K |
| RITHOLTZ WEALTH MANAGEMENT | Increased | 118.8K | 132.9K | +14.2K |
| STRS OHIO | New | 0 | 14.0K | +14.0K |
| RHUMBLINE ADVISERS | New | 0 | 13.7K | +13.7K |
| PRICE T ROWE ASSOCIATES INC /MD/ | New | 0 | 13.5K | +13.5K |
| IMC-Chicago, LLC | New | 0 | 13.3K | +13.3K |
| Engineers Gate Manager LP | New | 0 | 12.3K | +12.3K |
| UBS Group AG | Reduced | 43.7K | 32.2K | -11.6K |
| D'Orazio & Associates, Inc. | Sold Out | 11.1K | 0 | -11.1K |
| DUDLEY CAPITAL MANAGEMENT, LLC | Sold Out | 11.0K | 0 | -11.0K |
| Schonfeld Strategic Advisors LLC | Sold Out | 10.3K | 0 | -10.3K |
| MetLife Investment Management, LLC | New | 0 | 9.9K | +9.9K |
| RENAISSANCE TECHNOLOGIES LLC | Reduced | 423.2K | 414.4K | -8.8K |
| GABELLI FUNDS LLC | Reduced | 1.4M | 1.4M | -8.0K |
| CITIGROUP INC | Increased | 1.5K | 9.1K | +7.6K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | New | 0 | 7.5K | +7.5K |
| JPMORGAN CHASE & CO | New | 0 | 7.3K | +7.3K |
| BANK OF AMERICA CORP /DE/ | Reduced | 20.3K | 14.0K | -6.3K |
| WELLS FARGO & COMPANY/MN | Increased | 656.0K | 660.9K | +4.9K |
| Police & Firemen's Retirement System of New Jersey | New | 0 | 4.8K | +4.8K |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.