Who owns Ampco-Pittsburgh Corp.?
Institutional ownership of AP from SEC Form 13F filings across 62 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.
62
13F holders
$50.1M
value, 2026 filers
29.6%
of shares outstanding (6.0M sh)
25
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 | BlackRock, Inc. | 982,611 | $8.5M | 0.0% | 4.8% | +383.7% |
| 2 | AMERIPRISE FINANCIAL INC | 905,679 | $7.8M | 0.0% | 4.5% | -22.8% |
| 3 | WELLS FARGO & COMPANY/MN | 660,945 | $5.7M | 0.0% | 3.3% | +0.8% |
| 4 | VANGUARD CAPITAL MANAGEMENT LLC | 604,091 | $5.2M | 0.0% | 3% | -49.7% |
| 5 | GEODE CAPITAL MANAGEMENT, LLC | 342,836 | $3.0M | 0.0% | 1.7% | +153.8% |
| 6 | AMERICAN CENTURY COMPANIES INC | 328,848 | $2.8M | 0.0% | 1.6% | +50.3% |
| 7 | RITHOLTZ WEALTH MANAGEMENT | 265,886 | $2.3M | 0.0% | 1.3% | +123.8% |
| 8 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 195,321 | $1.7M | 0.0% | 1% | +634.3% |
| 9 | ACADIAN ASSET MANAGEMENT LLC | 191,015 | $1,646 | 0.0% | 0.9% | +128.5% |
| 10 | O'SHAUGHNESSY ASSET MANAGEMENT, LLC | 174,312 | $1.5M | 0.0% | 0.9% | +42.4% |
| 11 | JANE STREET GROUP, LLC | 150,371 | $1.3M | 0.0% | 0.7% | -10.7% |
| 12 | Huntleigh Advisors, Inc. | 141,172 | $1.2M | 0.2% | 0.7% | -38.7% |
| 13 | NORTHERN TRUST CORP | 121,477 | $1.1M | 0.0% | 0.6% | +327.4% |
| 14 | VANGUARD PORTFOLIO MANAGEMENT LLCNEW | 112,721 | $975,037 | 0.0% | 0.6% | new |
| 15 | GOLDMAN SACHS GROUP INC | 100,724 | $871,263 | 0.0% | 0.5% | +147.3% |
| 16 | VANGUARD FIDUCIARY TRUST CO | 92,875 | $803,369 | 0.0% | 0.5% | +27.6% |
| 17 | MARSHALL WACE, LLP | 80,361 | $695,123 | 0.0% | 0.4% | -50.2% |
| 18 | SEI INVESTMENTS CO | 65,911 | $570,130 | 0.0% | 0.3% | -64.2% |
| 19 | CITADEL ADVISORS LLC | 51,409 | $444,688 | 0.0% | 0.3% | +256.0% |
| 20 | Sixth Street Partners Management Company, L.P.NEW | 39,373 | $340,576 | 0.1% | 0.2% | new |
| 21 | CHARLES SCHWAB INVESTMENT MANAGEMENT INCNEW | 39,373 | $340,576 | 0.0% | 0.2% | new |
| 22 | Bank of New York Mellon CorpNEW | 33,984 | $293,964 | 0.0% | 0.2% | new |
| 23 | Qube Research & Technologies LtdNEW | 32,230 | $278,790 | 0.0% | 0.2% | new |
| 24 | UBS Group AG | 32,154 | $278,132 | 0.0% | 0.2% | -26.5% |
| 25 | Nuveen, LLCNEW | 21,419 | $185,274 | 0.0% | 0.1% | new |
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.