Masimo
MASI
MASI was delisted on the 9th of June, 2026.
352 hedge funds and large institutions have $6.24B invested in Masimo in 2024 Q2 according to their latest regulatory filings, with 56 funds opening new positions, 117 increasing their positions, 109 reducing their positions, and 41 closing their positions.
37% more first-time investments, than exits
New positions opened: 56 | Existing positions closed: 41
4% more funds holding
Funds holding: 339 → 352 (+13)
7% more repeat investments, than reductions
Existing positions increased: 117 | Existing positions reduced: 109
6% less call options, than puts
Call options by funds: $37M | Put options by funds: $39.2M
4.57% less ownership
Funds ownership: 97.71% → 93.14% (-4.6%)
18% less capital invested
Capital invested by funds: $7.59B → $6.24B (-$1.36B)
40% less funds holding in top 10
Funds holding in top 10: 5 → 3 (-2)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
BlackRock
New York
|
+$194M |
| 2 |
Westfield Capital Management
Boston,
Massachusetts
|
+$58.7M |
| 3 |
Millennium Management
New York
|
+$53.6M |
| 4 |
Thrivent Financial for Lutherans
Minneapolis,
Minnesota
|
+$47.5M |
| 5 |
Point72 Asset Management
Stamford,
Connecticut
|
+$46.3M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Fidelity Investments
Boston,
Massachusetts
|
-$289M |
| 2 |
Capital Research Global Investors
Los Angeles,
California
|
-$160M |
| 3 |
Citadel Advisors
Miami,
Florida
|
-$147M |
| 4 |
Massachusetts Financial Services
Boston,
Massachusetts
|
-$132M |
| 5 |
MC
MIG Capital
Newport Beach,
California
|
-$56.1M |
MASI Hedge Fund Activity: Q2 2024 in Review
352 of the 6,925 institutional investors tracked by Wall St. Rank reported a position in Masimo (MASI) for Q2 2024, worth a combined $6.24B — down 18% from $7.59B a quarter earlier.
Buyers outnumbered sellers: 56 funds opened new MASI positions and 41 closed out — a net gain of 15 holders — while 117 added to existing stakes and 109 trimmed.
The largest buyer was BlackRock, adding an estimated $194M. The largest seller was Fidelity Investments, cutting an estimated $289M.
- 352 institutional investors held Masimo (MASI) as of Q2 2024, up from 339 in Q1 2024.
- Funds reported $6.24B of Masimo stock for Q2 2024, down 18% quarter-over-quarter.
- 56 funds opened new Masimo positions in Q2 2024 and 41 closed out, a net change of +15 holders.
- The largest Masimo buyer in Q2 2024 was BlackRock, an estimated $194M added.
- The largest Masimo seller in Q2 2024 was Fidelity Investments, an estimated $289M sold.
Based on aggregated 13F filings for Q2 2024.