Masimo
MASI
MASI was delisted on the 9th of June, 2026.
236 hedge funds and large institutions have $1.66B invested in Masimo in 2015 Q4 according to their latest regulatory filings, with 36 funds opening new positions, 92 increasing their positions, 79 reducing their positions, and 20 closing their positions.
80% more first-time investments, than exits
New positions opened: 36 | Existing positions closed: 20
22% more call options, than puts
Call options by funds: $2.02M | Put options by funds: $1.66M
16% more repeat investments, than reductions
Existing positions increased: 92 | Existing positions reduced: 79
7% more funds holding
Funds holding: 221 → 236 (+15)
6% more capital invested
Capital invested by funds: $1.56B → $1.66B (+$98.9M)
0% more funds holding in top 10
Funds holding in top 10: 3 → 3 (0)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
AL
AJO LP
Philadelphia,
Pennsylvania
|
+$15.2M |
| 2 |
Prudential Financial
Newark,
New Jersey
|
+$10.6M |
| 3 |
BJCM
Blue Jay Capital Management
Los Angeles,
California
|
+$8.78M |
| 4 |
CIP
Chartwell Investment Partners
Berywn,
Pennsylvania
|
+$8.4M |
| 5 |
Fuller & Thaler Asset Management
San Mateo,
California
|
+$7.15M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
HIM
Hermes Investment Management
London Uk,
United Kingdom
|
-$30.3M |
| 2 |
BA
BlackRock Advisors
Wilmington,
Delaware
|
-$17.4M |
| 3 |
BC
Broadfin Capital
New York
|
-$16.3M |
| 4 |
BG
BlackRock Group
London,
United Kingdom
|
-$10.8M |
| 5 |
Schroder Investment Management Group
London,
United Kingdom
|
-$10.6M |
MASI Hedge Fund Activity: Q4 2015 in Review
236 of the 3,813 institutional investors tracked by Wall St. Rank reported a position in Masimo (MASI) for Q4 2015, worth a combined $1.66B — up 6.3% from $1.56B a quarter earlier.
Buyers outnumbered sellers: 36 funds opened new MASI positions and 20 closed out — a net gain of 16 holders — while 92 added to existing stakes and 79 trimmed.
The largest buyer was AJO LP, opening a new position worth an estimated $15.2M. The largest seller was Hermes Investment Management, cutting an estimated $30.3M.
- 236 institutional investors held Masimo (MASI) as of Q4 2015, up from 221 in Q3 2015.
- Funds reported $1.66B of Masimo stock for Q4 2015, up 6.3% quarter-over-quarter.
- 36 funds opened new Masimo positions in Q4 2015 and 20 closed out, a net change of +16 holders.
- The largest Masimo buyer in Q4 2015 was AJO LP, an estimated $15.2M added.
- The largest Masimo seller in Q4 2015 was Hermes Investment Management, an estimated $30.3M sold.
Based on aggregated 13F filings for Q4 2015.