AMPHASTAR PHARMACEUTICALS INC: Ownership & Insider Activity
Hedge funds and institutional managers reporting a position in AMPHASTAR PHARMACEUTICALS INC. Based on the most recent 13F filing from each holder, sourced from SEC EDGAR.
Reported Holders
3
13F filers
Aggregate Value
$77.4M
Across holders
Last Price
—
EOD close
Sector
—
GICS
Quarterly fund activity3 increased0 reduced0 exited
| Manager⇅ | Type⇅ | Shares⇅ | Market Value▼ | % of Total⇅ | % of Portfolio⇅ | Action⇅ | QoQ Change⇅ | Quarter⇅ |
|---|---|---|---|---|---|---|---|---|
| OAKTREE CAPITAL MANAGEMENT LP CIK 0000949509 | Hedge Fund | 40.88M | $37.2M | 48.1% | 0.5% | Added | +$2.6M | Q2 2026 |
| MILLENNIUM MANAGEMENT LLC CIK 0001273087 | Hedge Fund | 34.00M | $31.0M | 40.1% | 0.0% | Added | — | Q2 2026 |
| CAPSTONE INVESTMENT ADVISORS, LLC CIK 0001426196 | Hedge Fund | 10.08M | $9.2M | 11.9% | 0.0% | Added | — | Q2 2026 |