MASIMO CORP CALL is a security (CUSIP 574795900) tracked across SEC portfolio filings. 3 institutional managers reported $8.5M on Form 13F as of 2026-03-31.
| Manager | Location | Value | Shares |
|---|---|---|---|
| SIMPLEX TRADING, LLC | CHICAGO, IL | $8.3M | — |
| GROUP ONE TRADING, L.P. | CHICAGO, IL | $267K | — |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | BIRMINGHAM, AL | — | — |