Masimo
MASI
MASI was delisted on the 9th of June, 2026.
178 hedge funds and large institutions have $1.11B invested in Masimo in 2014 Q4 according to their latest regulatory filings, with 35 funds opening new positions, 51 increasing their positions, 74 reducing their positions, and 22 closing their positions.
470% more call options, than puts
Call options by funds: $319K | Put options by funds: $56K
100% more funds holding in top 10
Funds holding in top 10: 1 → 2 (+1)
59% more first-time investments, than exits
New positions opened: 35 | Existing positions closed: 22
21% more capital invested
Capital invested by funds: $918M → $1.11B (+$189M)
7% more funds holding
Funds holding: 167 → 178 (+11)
2.43% less ownership
Funds ownership: 82.35% → 79.91% (-2.4%)
31% less repeat investments, than reductions
Existing positions increased: 51 | Existing positions reduced: 74
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Massachusetts Financial Services
Boston,
Massachusetts
|
+$19.7M |
| 2 |
CIP
Chartwell Investment Partners
Berywn,
Pennsylvania
|
+$9.36M |
| 3 |
Janus Henderson Group
London,
|
+$7.48M |
| 4 |
SGA
Sector Gamma AS
Oslo,
Norway
|
+$6.95M |
| 5 |
D.E. Shaw & Co
New York
|
+$4.97M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Fidelity Investments
Boston,
Massachusetts
|
-$18.4M |
| 2 |
CIP
Champlain Investment Partners
Burlington,
Vermont
|
-$11.3M |
| 3 |
Millennium Management
New York
|
-$7.83M |
| 4 |
KCM
Kennedy Capital Management
St Louis,
Missouri
|
-$7.1M |
| 5 |
FAM
Foundation Asset Management
White Plains,
New York
|
-$6.51M |
MASI Hedge Fund Activity: Q4 2014 in Review
178 of the 3,765 institutional investors tracked by Wall St. Rank reported a position in Masimo (MASI) for Q4 2014, worth a combined $1.11B — up 21% from $918M a quarter earlier.
Buyers outnumbered sellers: 35 funds opened new MASI positions and 22 closed out — a net gain of 13 holders — while 51 added to existing stakes and 74 trimmed.
The largest buyer was Massachusetts Financial Services, adding an estimated $19.7M. The largest seller was Fidelity Investments, cutting an estimated $18.4M.
- 178 institutional investors held Masimo (MASI) as of Q4 2014, up from 167 in Q3 2014.
- Funds reported $1.11B of Masimo stock for Q4 2014, up 21% quarter-over-quarter.
- 35 funds opened new Masimo positions in Q4 2014 and 22 closed out, a net change of +13 holders.
- The largest Masimo buyer in Q4 2014 was Massachusetts Financial Services, an estimated $19.7M added.
- The largest Masimo seller in Q4 2014 was Fidelity Investments, an estimated $18.4M sold.
Based on aggregated 13F filings for Q4 2014.