MASI
MASIMO CORPData as of 2026 Q1 (03-31) · 13F snapshot
Summary
MASIMO CORP (MASI) is held by 8 tracked hedge-fund managers, a combined reported value of ~$488.92M; the largest are Izzy Englander, Andreas Halvorsen, Joel Greenblatt. This quarter: 1 new, 4 added, 1 closed. 7 members of Congress have disclosed STOCK Act trades. Data as of 2026 Q1, from public SEC 13F filings, delayed up to ~45 days.
Attention · HighThis quarter · Heating up
Gurus holding8
Congress trades7
Price$179.95vs quarter-end+1.17%
Sectors0
This quarter's moves
Top holderIzzy EnglanderNew1
Added4
Trimmed / sold1
Joel GreenblattHold
Value $60.74M0.2% of portfolio341,4682026 Q1
Value $51.33M— of portfolio288,6002026 Q1
Value $8.27M— of portfolio50,0002024 Q4
Value $4.91M— of portfolio27,6002026 Q1
Value $4.23M— of portfolio23,8002026 Q1
Value $1.67M— of portfolio10,0002025 Q1
| Investor | Value | % of portfolio | Action |
|---|---|---|---|
| Joel Greenblatt | $60.74M | 0.2% | Hold |
| Izzy EnglanderCALL | $51.33M | — | — |
| Steven CohenCALL | $8.27M | — | — |
| Ken GriffinCALL | $4.91M | — | — |
| Ken GriffinPUT | $4.23M | — | — |
| Izzy EnglanderPUT | $1.67M | — | — |
Data from public SEC 13F & STOCK Act filings, delayed up to ~45 days, partial holdings only — for research, not investment advice.