Masimo
MASI
MASI was delisted on the 9th of June, 2026.
405 hedge funds and large institutions have $6.54B invested in Masimo in 2022 Q4 according to their latest regulatory filings, with 52 funds opening new positions, 116 increasing their positions, 173 reducing their positions, and 61 closing their positions.
129% more call options, than puts
Call options by funds: $17.1M | Put options by funds: $7.47M
25% more funds holding in top 10
Funds holding in top 10: 4 → 5 (+1)
0% more capital invested
Capital invested by funds: $6.53B → $6.54B (+$15.6M)
3% less funds holding
Funds holding: 419 → 405 (-14)
3.71% less ownership
Funds ownership: 88.26% → 84.55% (-3.7%)
15% less first-time investments, than exits
New positions opened: 52 | Existing positions closed: 61
33% less repeat investments, than reductions
Existing positions increased: 116 | Existing positions reduced: 173
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Fidelity Investments
Boston,
Massachusetts
|
+$220M |
| 2 |
Capital Research Global Investors
Los Angeles,
California
|
+$131M |
| 3 |
BlackRock
New York
|
+$74.6M |
| 4 |
T. Rowe Price Investment Management
Baltimore,
Maryland
|
+$74.5M |
| 5 |
Vanguard Group
Malvern,
Pennsylvania
|
+$31.3M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
CIP
Champlain Investment Partners
Burlington,
Vermont
|
-$132M |
| 2 |
Citigroup
New York
|
-$69.4M |
| 3 |
Goldman Sachs
New York
|
-$62.6M |
| 4 |
Bank of Nova Scotia
Toronto,
Ontario, Canada
|
-$54.8M |
| 5 |
Neuberger Berman Group
New York
|
-$52M |
MASI Hedge Fund Activity: Q4 2022 in Review
405 of the 6,222 institutional investors tracked by Wall St. Rank reported a position in Masimo (MASI) for Q4 2022, worth a combined $6.54B — up 0.24% from $6.53B a quarter earlier.
Sellers outnumbered buyers: 61 funds closed out of MASI and 52 opened new positions — a net loss of 9 holders — while 173 trimmed existing stakes and 116 added.
The largest buyer was Fidelity Investments, adding an estimated $220M. The largest seller was Champlain Investment Partners, exiting entirely with an estimated $132M sold.
- 405 institutional investors held Masimo (MASI) as of Q4 2022, down from 419 in Q3 2022.
- Funds reported $6.54B of Masimo stock for Q4 2022, up 0.24% quarter-over-quarter.
- 52 funds opened new Masimo positions in Q4 2022 and 61 closed out, a net change of -9 holders.
- The largest Masimo buyer in Q4 2022 was Fidelity Investments, an estimated $220M added.
- The largest Masimo seller in Q4 2022 was Champlain Investment Partners, an estimated $132M sold.
Based on aggregated 13F filings for Q4 2022.