AMPCO-PITTSBURGH CORP (AP): Ownership & Insider Activity
Hedge funds and institutional managers reporting a position in AP · Materials. Based on the most recent 13F filing from each holder, sourced from SEC EDGAR.
Reported Holders
7
13F filers
Aggregate Value
$26.6M
Across holders
Last Price
$8.52
2026-08-24
Sector
Materials
GICS
Quarterly fund activity2 increased5 reduced2 exited
| Manager⇅ | Type⇅ | Shares⇅ | Market Value▼ | % of Total⇅ | % of Portfolio⇅ | Action⇅ | QoQ Change⇅ | Quarter⇅ |
|---|---|---|---|---|---|---|---|---|
| GAMCO INVESTORS, INC. ET AL CIK 0000807249 | Institutional Manager | 2.46M | $21.3M | 80.0% | 0.2% | Reduced | $-278K | Q2 2026 |
| RENAISSANCE TECHNOLOGIES LLC CIK 0001037389 | Hedge Fund | 414K | $3.6M | 13.5% | 0.0% | Reduced | $-76K | Q2 2026 |
| MARSHALL WACE, LLP CIK 0001318757 | Hedge Fund | 80K | $695K | 2.6% | 0.0% | Reduced | $-1.7M | Q2 2026 |
| CITADEL ADVISORS LLC CIK 0001423053 | Hedge Fund | 51K | $445K | 1.7% | 0.0% | Added | +$195K | Q2 2026 |
| Qube Research & Technologies Ltd CIK 0001729829 | Hedge Fund | 32K | $279K | 1.0% | 0.0% | Added | — | Q2 2026 |
| MILLENNIUM MANAGEMENT LLC CIK 0001273087 | Hedge Fund | 20K | $171K | 0.6% | 0.0% | Reduced | $-1.2M | Q2 2026 |
| Brevan Howard Capital Management LP CIK 0001512857 | Hedge Fund | 16K | $142K | 0.5% | 0.0% | Reduced | $-20K | Q2 2026 |
Reduced
Institutional Manager
$21.3M· 80.0% of total· 0.2% port· 2.46M sh· $-278K QoQ· Q2 2026
Reduced
Hedge Fund
$3.6M· 13.5% of total· 0.0% port· 414K sh· $-76K QoQ· Q2 2026
Reduced
Hedge Fund
$695K· 2.6% of total· 0.0% port· 80K sh· $-1.7M QoQ· Q2 2026
Added
Hedge Fund
$445K· 1.7% of total· 0.0% port· 51K sh· +$195K QoQ· Q2 2026
Added
Hedge Fund
$279K· 1.0% of total· 0.0% port· 32K sh· — QoQ· Q2 2026
Reduced
Hedge Fund
$171K· 0.6% of total· 0.0% port· 20K sh· $-1.2M QoQ· Q2 2026
Reduced
Hedge Fund
$142K· 0.5% of total· 0.0% port· 16K sh· $-20K QoQ· Q2 2026
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