Masimo
MASI
MASI was delisted on the 9th of June, 2026.
221 hedge funds and large institutions have $1.57B invested in Masimo in 2015 Q3 according to their latest regulatory filings, with 37 funds opening new positions, 80 increasing their positions, 83 reducing their positions, and 15 closing their positions.
147% more first-time investments, than exits
New positions opened: 37 | Existing positions closed: 15
59% more call options, than puts
Call options by funds: $3.16M | Put options by funds: $1.99M
10% more funds holding
Funds holding: 201 → 221 (+20)
0.42% more ownership
Funds ownership: 80.4% → 80.82% (+0.42%)
0% more funds holding in top 10
Funds holding in top 10: 3 → 3 (0)
1% less capital invested
Capital invested by funds: $1.59B → $1.57B (-$20.6M)
4% less repeat investments, than reductions
Existing positions increased: 80 | Existing positions reduced: 83
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
BIT
BlackRock Institutional Trust
San Francisco,
California
|
+$27.4M |
| 2 |
BC
Broadfin Capital
New York
|
+$17.2M |
| 3 |
BA
BlackRock Advisors
Wilmington,
Delaware
|
+$14.8M |
| 4 |
Bank of America
Charlotte,
North Carolina
|
+$10.1M |
| 5 |
BIM
Bogle Investment Management
Newton Lower Falls,
Massachusetts
|
+$8.25M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
JHIU
Janus Henderson Investors US
Denver,
Colorado
|
-$55.2M |
| 2 |
CCM
Camber Capital Management
Boston,
Massachusetts
|
-$36.8M |
| 3 |
Massachusetts Financial Services
Boston,
Massachusetts
|
-$16.5M |
| 4 |
Westfield Capital Management
Boston,
Massachusetts
|
-$10M |
| 5 |
Fuller & Thaler Asset Management
San Mateo,
California
|
-$7.76M |
MASI Hedge Fund Activity: Q3 2015 in Review
221 of the 3,590 institutional investors tracked by Wall St. Rank reported a position in Masimo (MASI) for Q3 2015, worth a combined $1.57B — down 1.3% from $1.59B a quarter earlier.
Buyers outnumbered sellers: 37 funds opened new MASI positions and 15 closed out — a net gain of 22 holders — while 80 added to existing stakes and 83 trimmed.
The largest buyer was BlackRock Institutional Trust, adding an estimated $27.4M. The largest seller was Janus Henderson Investors US, cutting an estimated $55.2M.
- 221 institutional investors held Masimo (MASI) as of Q3 2015, up from 201 in Q2 2015.
- Funds reported $1.57B of Masimo stock for Q3 2015, down 1.3% quarter-over-quarter.
- 37 funds opened new Masimo positions in Q3 2015 and 15 closed out, a net change of +22 holders.
- The largest Masimo buyer in Q3 2015 was BlackRock Institutional Trust, an estimated $27.4M added.
- The largest Masimo seller in Q3 2015 was Janus Henderson Investors US, an estimated $55.2M sold.
Based on aggregated 13F filings for Q3 2015.