We are live on ! Find out more
MASI

Masimo
MASI

Delisted

MASI was delisted on the 9th of June, 2026.

Back to rankings

221 hedge funds and large institutions have $1.56B 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.

New
Increased
Maintained
Reduced
Closed

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% more funds holding in top 10

Funds holding in top 10: 3 → 3 (0)

1% less capital invested

Capital invested by funds: $1.59B → $1.56B (-$20.9M)

4% less repeat investments, than reductions

Existing positions increased: 80 | Existing positions reduced: 83

Holders
221
Holders Change
+20
Holders Change %
+9.95%
% of All Funds
6.17%
Holding in Top 10
3
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
0.08%
New
37
Increased
80
Reduced
83
Closed
15
Calls
$3.16M
Puts
$1.99M
Net Calls
+$1.17M
Net Calls Change
-$87K

Top Buyers

Rank Fund Capital Flow
1
BIT
BlackRock Institutional Trust
California
+$27.4M
2
BC
Broadfin Capital
New York
+$17.2M
3
BA
BlackRock Advisors
Delaware
+$14.8M
4
Bank of America
Bank of America
North Carolina
+$10.1M
5
BIM
Bogle Investment Management
Massachusetts
+$8.25M

Top Sellers

Rank Fund Capital Flow
1
JHIU
Janus Henderson Investors US
Colorado
-$55.2M
2
CCM
Camber Capital Management
Massachusetts
-$36.8M
3
Massachusetts Financial Services
Massachusetts Financial Services
Massachusetts
-$16.5M
4
Westfield Capital Management
Westfield Capital Management
Massachusetts
-$10M
5
Fuller & Thaler Asset Management
Fuller & Thaler Asset Management
California
-$7.76M
Name Holding Trade Value Shares
Change 		Change in
Stake
BC
101
Birchview Capital
Vermont
$1.41M – – –
HHC
102
Hutchin Hill Capital
New York
$1.41M +$1.5M +36,600 New
PP
103
Paloma Partners
Connecticut
$1.39M +$1.1M +26,827 +291%
Grantham, Mayo, Van Otterloo & Co (GMO)
104
Grantham, Mayo, Van Otterloo & Co (GMO)
Massachusetts
$1.36M – – –
VRS
105
Virginia Retirement Systems
Virginia
$1.34M -$257K -6,300 -15%
UBS AM
106
UBS AM
Illinois
$1.25M +$286K +7,000 +28%
MLICM
107
Metropolitan Life Insurance Company (MetLife)
New York
$1.22M -$31.9K -781 -2%
AIG
108
American International Group
New York
$1.22M +$2.74K +67 +0.2%
MIG
109
Mariner Investment Group
New York
$1.16M -$817K -20,000 -40%
Barclays
110
Barclays
United Kingdom
$1.15M +$1.2M +29,387 +3,494%
GC
111
Globeflex Capital
California
$1.15M -$241K -5,900 -17%
SO
112
STRS Ohio
Ohio
$1.07M -$73.5K -1,800 -6%
CIA
113
Capital Impact Advisors
Massachusetts
$1.06M – – –
FMT
114
First Mercantile Trust
Tennessee
$1.03M +$229K +5,616 +27%
Allianz Asset Management
115
Allianz Asset Management
Germany
$1.01M +$380K +9,305 +55%
RI
116
RTW Investments
New York
$999K +$1.06M +25,900 New
Ohio Public Employees Retirement System (OPERS)
117
Ohio Public Employees Retirement System (OPERS)
Ohio
$942K +$843K +20,637 +545%
DADC
118
D.A. Davidson & Co
Montana
$916K -$365K -8,935 -27%
CC
119
Curian Capital
Colorado
$865K -$264K -6,454 -22%
ASRS
120
Arizona State Retirement System
Arizona
$850K +$901K +22,042 New
OSAM
121
O'Shaughnessy Asset Management
Connecticut
$832K +$710K +17,382 +413%
GS
122
GAM Systematic
United Kingdom
$820K +$869K +21,276 New
Brown Advisory
123
Brown Advisory
Maryland
$809K +$16.1K +394 +2%
LSERS
124
Louisiana State Employees Retirement System
Louisiana
$779K -$36.8K -900 -4%
RJFSA
125
Raymond James Financial Services Advisors
Florida
$777K +$823K +20,146 New
3 4
5
6 7

MASI Hedge Fund Activity: Q3 2015 in Review

221 of the 3,583 institutional investors tracked by Wall St. Rank reported a position in Masimo (MASI) for Q3 2015, worth a combined $1.56B — 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 $1.56B 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.