Masimo
MASI
MASI was delisted on the 9th of June, 2026.
338 hedge funds and large institutions have $3.65B invested in Masimo in 2017 Q4 according to their latest regulatory filings, with 53 funds opening new positions, 101 increasing their positions, 131 reducing their positions, and 34 closing their positions.
56% more first-time investments, than exits
New positions opened: 53 | Existing positions closed: 34
5% more funds holding
Funds holding: 323 → 338 (+15)
0% more funds holding in top 10
Funds holding in top 10: 1 → 1 (0)
1.38% less ownership
Funds ownership: 84.65% → 83.26% (-1.4%)
20% less capital inflows, than outflows
Capital inflows: $321M | Capital outflows: $399M
21% less call options, than puts
Call options by funds: $4.76M | Put options by funds: $6.06M
23% less repeat investments, than reductions
Existing positions increased: 101 | Existing positions reduced: 131
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Point72 Asset Management
Stamford,
Connecticut
|
+$59.3M |
| 2 |
Westfield Capital Management
Boston,
Massachusetts
|
+$22.8M |
| 3 |
Marshall Wace North America
New York
|
+$22M |
| 4 |
Champlain Investment Partners
Burlington,
Vermont
|
+$17.2M |
| 5 |
Columbia Wanger Asset Management
Chicago,
Illinois
|
+$16.6M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Acadian Asset Management
Boston,
Massachusetts
|
-$45.4M |
| 2 |
Nationwide Fund Advisors
Columbus,
Ohio
|
-$28.7M |
| 3 |
Two Sigma Advisers
New York
|
-$25.4M |
| 4 |
Numeric Investors
Boston,
Massachusetts
|
-$22.7M |
| 5 |
Robeco Institutional Asset Management
Rotterdam,
Netherlands
|
-$16.3M |
MASI Hedge Fund Activity: Q4 2017 in Review
338 of the 4,420 institutional investors tracked by Wall St. Rank reported a position in Masimo (MASI) for Q4 2017, worth a combined $3.65B — down 4.1% from $3.8B a quarter earlier.
Buyers outnumbered sellers: 53 funds opened new MASI positions and 34 closed out — a net gain of 19 holders — while 101 added to existing stakes and 131 trimmed.
The largest buyer was Point72 Asset Management, opening a new position worth an estimated $59.3M. The largest seller was Acadian Asset Management, cutting an estimated $45.4M.
- 338 institutional investors held Masimo (MASI) as of Q4 2017, up from 323 in Q3 2017.
- Funds reported $3.65B of Masimo stock for Q4 2017, down 4.1% quarter-over-quarter.
- 53 funds opened new Masimo positions in Q4 2017 and 34 closed out, a net change of +19 holders.
- The largest Masimo buyer in Q4 2017 was Point72 Asset Management, an estimated $59.3M added.
- The largest Masimo seller in Q4 2017 was Acadian Asset Management, an estimated $45.4M sold.
Based on aggregated 13F filings for Q4 2017.