AMPHASTAR PHARMACEUTICALS IN PUT is a security (CUSIP 03209R953) tracked across SEC portfolio filings. 2 institutional managers reported $33K on Form 13F as of 2026-03-31.
| Manager | Location | Value | Shares |
|---|---|---|---|
| SIMPLEX TRADING, LLC | CHICAGO, IL | $33K | — |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | BIRMINGHAM, AL | — | — |