Masimo
MASI
MASI was delisted on the 9th of June, 2026.
339 hedge funds and large institutions have $7.59B invested in Masimo in 2024 Q1 according to their latest regulatory filings, with 50 funds opening new positions, 95 increasing their positions, 128 reducing their positions, and 50 closing their positions.
27% more capital invested
Capital invested by funds: $5.96B → $7.59B (+$1.64B)
1.48% more ownership
Funds ownership: 96.22% → 97.71% (+1.5%)
0% more funds holding in top 10
Funds holding in top 10: 5 → 5 (0)
0% more first-time investments, than exits
New positions opened: 50 | Existing positions closed: 50
1% less funds holding
Funds holding: 342 → 339 (-3)
26% less repeat investments, than reductions
Existing positions increased: 95 | Existing positions reduced: 128
26% less call options, than puts
Call options by funds: $30.9M | Put options by funds: $42M
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
BlackRock
New York
|
+$287M |
| 2 |
Holocene Advisors
New York
|
+$101M |
| 3 |
Citadel Advisors
Miami,
Florida
|
+$75M |
| 4 |
BAMCO Inc
New York
|
+$44.6M |
| 5 |
FCM
Farallon Capital Management
San Francisco,
California
|
+$23M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
JSP
Jackson Square Partners
Larkspur,
California
|
-$60.2M |
| 2 |
Morgan Stanley
New York
|
-$57.4M |
| 3 |
Schroder Investment Management Group
London,
United Kingdom
|
-$45.2M |
| 4 |
T. Rowe Price Associates
Baltimore,
Maryland
|
-$43.8M |
| 5 |
HRCM
Hawk Ridge Capital Management
Los Angeles,
California
|
-$40.1M |
MASI Hedge Fund Activity: Q1 2024 in Review
339 of the 6,943 institutional investors tracked by Wall St. Rank reported a position in Masimo (MASI) for Q1 2024, worth a combined $7.59B — up 27% from $5.96B a quarter earlier.
Fund positioning in MASI was balanced in Q1 2024: 50 funds opened new positions, 50 closed out, 95 added to existing stakes and 128 trimmed.
The largest buyer was BlackRock, adding an estimated $287M. The largest seller was Jackson Square Partners, cutting an estimated $60.2M.
- 339 institutional investors held Masimo (MASI) as of Q1 2024, down from 342 in Q4 2023.
- Funds reported $7.59B of Masimo stock for Q1 2024, up 27% quarter-over-quarter.
- 50 funds opened new Masimo positions in Q1 2024 and 50 closed out, a net change of 0 holders.
- The largest Masimo buyer in Q1 2024 was BlackRock, an estimated $287M added.
- The largest Masimo seller in Q1 2024 was Jackson Square Partners, an estimated $60.2M sold.
Based on aggregated 13F filings for Q1 2024.