ZENAS BIOPHARMA INC PUT is a security (CUSIP 98937L955) tracked across SEC portfolio filings. 2 institutional managers reported $35K on Form 13F as of 2026-03-31.
| Manager | Location | Value | Shares |
|---|---|---|---|
| SIMPLEX TRADING, LLC | CHICAGO, IL | $27K | — |
| GROUP ONE TRADING, L.P. | CHICAGO, IL | $8K | — |