Who owns AMPCO PITTSBURGH CORP?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.
Institutional ownership of AP from SEC Form 13F filings across 85 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
As of the 2026-06-30 reporting period, 85 institutions disclosed 11.5M shares of AMPCO PITTSBURGH CORP worth $99.5M — about 56.3% of shares outstanding; the largest disclosed holder is GAMCO INVESTORS, INC. ET AL. Source: SEC Form 13F filings, parsed by EvidInvest.
85
13F holders
$99.5M
value, 2026 filers
56.3%
of shares outstanding (11.5M sh)
31
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30 · % of fund = share of the manager's own book · % of co. = share of AP's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | GAMCO INVESTORS, INC. ET AL | 2.5M | $21.3M | 0.2% | 12% | -1.3% |
| 2 | GABELLI FUNDS LLC | 1.4M | $12.0M | 0.1% | 6.8% | -0.6% |
| 3 | BlackRock, Inc. | 982,611 | $8.5M | 0.0% | 4.8% | +383.7% |
| 4 | AMERIPRISE FINANCIAL INC | 905,679 | $7.8M | 0.0% | 4.4% | -22.8% |
| 5 | WELLS FARGO & COMPANY/MN | 660,945 | $5.7M | 0.0% | 3.2% | +0.8% |
| 6 | VANGUARD CAPITAL MANAGEMENT LLC | 604,091 | $5.2M | 0.0% | 3% | +0.7% |
| 7 | RENAISSANCE TECHNOLOGIES LLC | 414,419 | $3.6M | 0.0% | 2% | -2.1% |
| 8 | GEODE CAPITAL MANAGEMENT, LLC | 342,836 | $3.0M | 0.0% | 1.7% | +153.8% |
| 9 | AMERICAN CENTURY COMPANIES INC | 328,848 | $2.8M | 0.0% | 1.6% | +50.3% |
| 10 | DIMENSIONAL FUND ADVISORS LP | 295,444 | $2.6M | 0.0% | 1.4% | -16.9% |
| 11 | Meros Investment Management, LP | 239,910 | $2.1M | 0.7% | 1.2% | +11.7% |
| 12 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 195,321 | $1.7M | 0.0% | 1% | +634.3% |
| 13 | ACADIAN ASSET MANAGEMENT LLC | 191,015 | $1.6M | 0.0% | 0.9% | +128.5% |
| 14 | O'SHAUGHNESSY ASSET MANAGEMENT, LLC | 174,312 | $1.5M | 0.0% | 0.9% | +42.4% |
| 15 | STATE STREET CORP | 159,316 | $1.4M | 0.0% | 0.8% | +168.1% |
| 16 | JANE STREET GROUP, LLC | 150,371 | $1.3M | 0.0% | 0.7% | -10.7% |
| 17 | Huntleigh Advisors, Inc. | 141,172 | $1.2M | 0.2% | 0.7% | -38.7% |
| 18 | RITHOLTZ WEALTH MANAGEMENT | 132,943 | $1.1M | 0.0% | 0.7% | +11.9% |
| 19 | Teton Advisors, LLC | 130,000 | $1.1M | 0.6% | 0.6% | 0.0% |
| 20 | BRIDGEWAY CAPITAL MANAGEMENT, LLC | 125,386 | $1.1M | 0.0% | 0.6% | -18.8% |
| 21 | NORTHERN TRUST CORP | 121,477 | $1.1M | 0.0% | 0.6% | +327.4% |
| 22 | VANGUARD PORTFOLIO MANAGEMENT LLCNEW | 112,721 | $975,037 | 0.0% | 0.6% | new |
| 23 | GOLDMAN SACHS GROUP INC | 100,724 | $871,263 | 0.0% | 0.5% | +147.3% |
| 24 | VANGUARD FIDUCIARY TRUST CO | 92,875 | $803,369 | 0.0% | 0.5% | +27.6% |
| 25 | Informed Momentum Co LLC | 90,053 | $778,958 | 0.1% | 0.4% | -22.2% |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.