Masimo
MASI
MASI was delisted on the 9th of June, 2026.
336 hedge funds and large institutions have $4.01B invested in Masimo in 2017 Q2 according to their latest regulatory filings, with 31 funds opening new positions, 152 increasing their positions, 116 reducing their positions, and 57 closing their positions.
31% more repeat investments, than reductions
Existing positions increased: 152 | Existing positions reduced: 116
1.35% more ownership
Funds ownership: 84.6% → 85.95% (+1.3%)
1% more capital invested
Capital invested by funds: $3.98B → $4.01B (+$30.5M)
8% less funds holding
Funds holding: 365 → 336 (-29)
35% less call options, than puts
Call options by funds: $5.32M | Put options by funds: $8.22M
46% less first-time investments, than exits
New positions opened: 31 | Existing positions closed: 57
50% less funds holding in top 10
Funds holding in top 10: 6 → 3 (-3)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
BlackRock
New York
|
+$50.6M |
| 2 |
Acadian Asset Management
Boston,
Massachusetts
|
+$36M |
| 3 |
JP Morgan Chase
New York
|
+$31.9M |
| 4 |
Vanguard Group
Malvern,
Pennsylvania
|
+$29.2M |
| 5 |
Capital Fund Management (CFM)
Paris,
France
|
+$28.1M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Two Sigma Investments
New York
|
-$40.5M |
| 2 |
Dimensional Fund Advisors
Austin,
Texas
|
-$35.9M |
| 3 |
NI
Numeric Investors
Boston,
Massachusetts
|
-$29.6M |
| 4 |
CIP
Champlain Investment Partners
Burlington,
Vermont
|
-$27.3M |
| 5 |
Two Sigma Advisers
New York
|
-$23.8M |
MASI Hedge Fund Activity: Q2 2017 in Review
336 of the 4,012 institutional investors tracked by Wall St. Rank reported a position in Masimo (MASI) for Q2 2017, worth a combined $4.01B — up 0.77% from $3.98B a quarter earlier.
Sellers outnumbered buyers: 57 funds closed out of MASI and 31 opened new positions — a net loss of 26 holders — while 116 trimmed existing stakes and 152 added.
The largest buyer was BlackRock, adding an estimated $50.6M. The largest seller was Two Sigma Investments, cutting an estimated $40.5M.
- 336 institutional investors held Masimo (MASI) as of Q2 2017, down from 365 in Q1 2017.
- Funds reported $4.01B of Masimo stock for Q2 2017, up 0.77% quarter-over-quarter.
- 31 funds opened new Masimo positions in Q2 2017 and 57 closed out, a net change of -26 holders.
- The largest Masimo buyer in Q2 2017 was BlackRock, an estimated $50.6M added.
- The largest Masimo seller in Q2 2017 was Two Sigma Investments, an estimated $40.5M sold.
Based on aggregated 13F filings for Q2 2017.