Masimo
MASI
MASI was delisted on the 9th of June, 2026.
405 hedge funds and large institutions have $6.22B invested in Masimo in 2019 Q1 according to their latest regulatory filings, with 69 funds opening new positions, 142 increasing their positions, 137 reducing their positions, and 31 closing their positions.
123% more first-time investments, than exits
New positions opened: 69 | Existing positions closed: 31
32% more capital invested
Capital invested by funds: $4.72B → $6.22B (+$1.5B)
25% more funds holding in top 10
Funds holding in top 10: 4 → 5 (+1)
10% more funds holding
Funds holding: 369 → 405 (+36)
4% more repeat investments, than reductions
Existing positions increased: 142 | Existing positions reduced: 137
0.67% more ownership
Funds ownership: 83.94% → 84.61% (+0.67%)
31% less call options, than puts
Call options by funds: $15.3M | Put options by funds: $22.1M
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Deutsche Bank
Frankfurt Am Main Ge,
Germany
|
+$70.6M |
| 2 |
Wellington Management Group
Boston,
Massachusetts
|
+$54.2M |
| 3 |
Invesco
Atlanta,
Georgia
|
+$44.5M |
| 4 |
Fidelity Investments
Boston,
Massachusetts
|
+$36.3M |
| 5 |
AQR Capital Management
Greenwich,
Connecticut
|
+$32.1M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
JIM
Jupiter Investment Management
London,
United Kingdom
|
-$47M |
| 2 |
Millennium Management
New York
|
-$46.1M |
| 3 |
American Century Companies
Kansas City,
Missouri
|
-$27.3M |
| 4 |
SI
Scout Investments
Kansas City,
Missouri
|
-$26.4M |
| 5 |
Renaissance Technologies
New York
|
-$24.3M |
MASI Hedge Fund Activity: Q1 2019 in Review
405 of the 4,621 institutional investors tracked by Wall St. Rank reported a position in Masimo (MASI) for Q1 2019, worth a combined $6.22B — up 32% from $4.72B a quarter earlier.
Buyers outnumbered sellers: 69 funds opened new MASI positions and 31 closed out — a net gain of 38 holders — while 142 added to existing stakes and 137 trimmed.
The largest buyer was Deutsche Bank, adding an estimated $70.6M. The largest seller was Jupiter Investment Management, cutting an estimated $47M.
- 405 institutional investors held Masimo (MASI) as of Q1 2019, up from 369 in Q4 2018.
- Funds reported $6.22B of Masimo stock for Q1 2019, up 32% quarter-over-quarter.
- 69 funds opened new Masimo positions in Q1 2019 and 31 closed out, a net change of +38 holders.
- The largest Masimo buyer in Q1 2019 was Deutsche Bank, an estimated $70.6M added.
- The largest Masimo seller in Q1 2019 was Jupiter Investment Management, an estimated $47M sold.
Based on aggregated 13F filings for Q1 2019.