Masimo
MASI
MASI was delisted on the 9th of June, 2026.
314 hedge funds and large institutions have $2.73B invested in Masimo in 2016 Q4 according to their latest regulatory filings, with 50 funds opening new positions, 98 increasing their positions, 127 reducing their positions, and 26 closing their positions.
188% more call options, than puts
Call options by funds: $4.15M | Put options by funds: $1.44M
92% more first-time investments, than exits
New positions opened: 50 | Existing positions closed: 26
81.48% more ownership
Funds ownership: 0% → 81.48% (+81%)
14% more capital invested
Capital invested by funds: $2.39B → $2.73B (+$338M)
7% more funds holding
Funds holding: 294 → 314 (+20)
23% less repeat investments, than reductions
Existing positions increased: 98 | Existing positions reduced: 127
50% less funds holding in top 10
Funds holding in top 10: 6 → 3 (-3)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
CWAM
Columbia Wanger Asset Management
Chicago,
Illinois
|
+$51.5M |
| 2 |
BFA
BlackRock Fund Advisors
San Francisco,
California
|
+$20.8M |
| 3 |
TA
Teachers Advisors
New York
|
+$14.5M |
| 4 |
Robeco Institutional Asset Management
Rotterdam,
Netherlands
|
+$14.3M |
| 5 |
Vanguard Group
Malvern,
Pennsylvania
|
+$12.6M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Arrowstreet Capital
Boston,
Massachusetts
|
-$34.2M |
| 2 |
Massachusetts Financial Services
Boston,
Massachusetts
|
-$16.4M |
| 3 |
MCM
Matarin Capital Management
New York
|
-$14.7M |
| 4 |
CIP
Chartwell Investment Partners
Berywn,
Pennsylvania
|
-$13.2M |
| 5 |
NI
Numeric Investors
Boston,
Massachusetts
|
-$11.1M |
MASI Hedge Fund Activity: Q4 2016 in Review
314 of the 4,001 institutional investors tracked by Wall St. Rank reported a position in Masimo (MASI) for Q4 2016, worth a combined $2.73B — up 14% from $2.39B a quarter earlier.
Buyers outnumbered sellers: 50 funds opened new MASI positions and 26 closed out — a net gain of 24 holders — while 98 added to existing stakes and 127 trimmed.
The largest buyer was Columbia Wanger Asset Management, opening a new position worth an estimated $51.5M. The largest seller was Arrowstreet Capital, exiting entirely with an estimated $34.2M sold.
- 314 institutional investors held Masimo (MASI) as of Q4 2016, up from 294 in Q3 2016.
- Funds reported $2.73B of Masimo stock for Q4 2016, up 14% quarter-over-quarter.
- 50 funds opened new Masimo positions in Q4 2016 and 26 closed out, a net change of +24 holders.
- The largest Masimo buyer in Q4 2016 was Columbia Wanger Asset Management, an estimated $51.5M added.
- The largest Masimo seller in Q4 2016 was Arrowstreet Capital, an estimated $34.2M sold.
Based on aggregated 13F filings for Q4 2016.