Masimo
MASI
MASI was delisted on the 9th of June, 2026.
163 hedge funds and large institutions have $1.38B invested in Masimo in 2013 Q4 according to their latest regulatory filings, with 18 funds opening new positions, 59 increasing their positions, 62 reducing their positions, and 13 closing their positions.
38% more first-time investments, than exits
New positions opened: 18 | Existing positions closed: 13
9% more capital invested
Capital invested by funds: $1.27B → $1.38B (+$110M)
3% more funds holding
Funds holding: 158 → 163 (+5)
5% less repeat investments, than reductions
Existing positions increased: 59 | Existing positions reduced: 62
54% less call options, than puts
Call options by funds: $389K | Put options by funds: $842K
67% less funds holding in top 10
Funds holding in top 10: 3 → 1 (-2)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Fidelity Investments
Boston,
Massachusetts
|
+$64.8M |
| 2 |
BNP Paribas Asset Management
Paris,
France
|
+$8.02M |
| 3 |
Schroder Investment Management Group
London,
United Kingdom
|
+$4.46M |
| 4 |
Millennium Management
New York
|
+$4.33M |
| 5 |
U
UBS
Zurich,
Switzerland
|
+$4.09M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
BAMCO Inc
New York
|
-$18.8M |
| 2 |
CIP
Chartwell Investment Partners
Berywn,
Pennsylvania
|
-$12.6M |
| 3 |
CCM
Camber Capital Management
Boston,
Massachusetts
|
-$9.1M |
| 4 |
ACH
ArrowMark Colorado Holdings
Denver,
Colorado
|
-$7.92M |
| 5 |
Fuller & Thaler Asset Management
San Mateo,
California
|
-$6.9M |
MASI Hedge Fund Activity: Q4 2013 in Review
163 of the 3,447 institutional investors tracked by Wall St. Rank reported a position in Masimo (MASI) for Q4 2013, worth a combined $1.38B — up 8.7% from $1.27B a quarter earlier.
Buyers outnumbered sellers: 18 funds opened new MASI positions and 13 closed out — a net gain of 5 holders — while 59 added to existing stakes and 62 trimmed.
The largest buyer was Fidelity Investments, adding an estimated $64.8M. The largest seller was BAMCO Inc, cutting an estimated $18.8M.
- 163 institutional investors held Masimo (MASI) as of Q4 2013, up from 158 in Q3 2013.
- Funds reported $1.38B of Masimo stock for Q4 2013, up 8.7% quarter-over-quarter.
- 18 funds opened new Masimo positions in Q4 2013 and 13 closed out, a net change of +5 holders.
- The largest Masimo buyer in Q4 2013 was Fidelity Investments, an estimated $64.8M added.
- The largest Masimo seller in Q4 2013 was BAMCO Inc, an estimated $18.8M sold.
Based on aggregated 13F filings for Q4 2013.