Masimo
MASI
MASI was delisted on the 9th of June, 2026.
457 hedge funds and large institutions have $6.61B invested in Masimo in 2022 Q1 according to their latest regulatory filings, with 73 funds opening new positions, 180 increasing their positions, 137 reducing their positions, and 129 closing their positions.
92% more call options, than puts
Call options by funds: $26.4M | Put options by funds: $13.8M
31% more repeat investments, than reductions
Existing positions increased: 180 | Existing positions reduced: 137
2.01% less ownership
Funds ownership: 84.02% → 82.01% (-2%)
12% less funds holding
Funds holding: 519 → 457 (-62)
43% less first-time investments, than exits
New positions opened: 73 | Existing positions closed: 129
51% less capital invested
Capital invested by funds: $13.5B → $6.61B (-$6.94B)
67% less funds holding in top 10
Funds holding in top 10: 9 → 3 (-6)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
LIP
Liontrust Investment Partners
London,
United Kingdom
|
+$193M |
| 2 |
Marshall Wace
London,
United Kingdom
|
+$186M |
| 3 |
Millennium Management
New York
|
+$139M |
| 4 |
D.E. Shaw & Co
New York
|
+$135M |
| 5 |
Assenagon Asset Management
Senningerberg,
Luxembourg
|
+$97.6M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
BlackRock
New York
|
-$413M |
| 2 |
Massachusetts Financial Services
Boston,
Massachusetts
|
-$250M |
| 3 |
Invesco
Atlanta,
Georgia
|
-$224M |
| 4 |
VNIM
Vaughan Nelson Investment Management
Houston,
Texas
|
-$218M |
| 5 |
OCBV
Ownership Capital B.V.
Amsterdam,
Netherlands
|
-$198M |
MASI Hedge Fund Activity: Q1 2022 in Review
457 of the 6,341 institutional investors tracked by Wall St. Rank reported a position in Masimo (MASI) for Q1 2022, worth a combined $6.61B — down 51% from $13.5B a quarter earlier.
Sellers outnumbered buyers: 129 funds closed out of MASI and 73 opened new positions — a net loss of 56 holders — while 137 trimmed existing stakes and 180 added.
The largest buyer was Liontrust Investment Partners, opening a new position worth an estimated $193M. The largest seller was BlackRock, cutting an estimated $413M.
- 457 institutional investors held Masimo (MASI) as of Q1 2022, down from 519 in Q4 2021.
- Funds reported $6.61B of Masimo stock for Q1 2022, down 51% quarter-over-quarter.
- 73 funds opened new Masimo positions in Q1 2022 and 129 closed out, a net change of -56 holders.
- The largest Masimo buyer in Q1 2022 was Liontrust Investment Partners, an estimated $193M added.
- The largest Masimo seller in Q1 2022 was BlackRock, an estimated $413M sold.
Based on aggregated 13F filings for Q1 2022.