Masimo
MASI
MASI was delisted on the 9th of June, 2026.
158 hedge funds and large institutions have $1.27B invested in Masimo in 2013 Q3 according to their latest regulatory filings, with 20 funds opening new positions, 56 increasing their positions, 65 reducing their positions, and 13 closing their positions.
54% more first-time investments, than exits
New positions opened: 20 | Existing positions closed: 13
50% more funds holding in top 10
Funds holding in top 10: 2 → 3 (+1)
29% more capital invested
Capital invested by funds: $987M → $1.27B (+$282M)
3% more funds holding
Funds holding: 153 → 158 (+5)
14% less repeat investments, than reductions
Existing positions increased: 56 | Existing positions reduced: 65
62% less call options, than puts
Call options by funds: $192K | Put options by funds: $506K
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Fidelity Investments
Boston,
Massachusetts
|
+$37.1M |
| 2 |
ACH
ArrowMark Colorado Holdings
Denver,
Colorado
|
+$18.3M |
| 3 |
HIM
Hermes Investment Management
London Uk,
United Kingdom
|
+$18.2M |
| 4 |
CIP
Chartwell Investment Partners
Berywn,
Pennsylvania
|
+$11.6M |
| 5 |
FIM
Foresters Investment Management
New York
|
+$9.55M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
BCM
Bares Capital Management
Austin,
Texas
|
-$16M |
| 2 |
PCMI
Paradigm Capital Management Inc
Albany,
New York
|
-$9.78M |
| 3 |
Renaissance Technologies
New York
|
-$9.78M |
| 4 |
Wells Fargo
San Francisco,
California
|
-$5.98M |
| 5 |
EAM
Eagle Asset Management
St Petersburg,
Florida
|
-$4.45M |
MASI Hedge Fund Activity: Q3 2013 in Review
158 of the 3,085 institutional investors tracked by Wall St. Rank reported a position in Masimo (MASI) for Q3 2013, worth a combined $1.27B — up 29% from $987M a quarter earlier.
Buyers outnumbered sellers: 20 funds opened new MASI positions and 13 closed out — a net gain of 7 holders — while 56 added to existing stakes and 65 trimmed.
The largest buyer was Fidelity Investments, opening a new position worth an estimated $37.1M. The largest seller was Bares Capital Management, cutting an estimated $16M.
- 158 institutional investors held Masimo (MASI) as of Q3 2013, up from 153 in Q2 2013.
- Funds reported $1.27B of Masimo stock for Q3 2013, up 29% quarter-over-quarter.
- 20 funds opened new Masimo positions in Q3 2013 and 13 closed out, a net change of +7 holders.
- The largest Masimo buyer in Q3 2013 was Fidelity Investments, an estimated $37.1M added.
- The largest Masimo seller in Q3 2013 was Bares Capital Management, an estimated $16M sold.
Based on aggregated 13F filings for Q3 2013.