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Masimo
MASI

Overview Fund Activity

369 hedge funds and large institutions have $9.59B invested in Masimo in 2025 Q2 according to their latest regulatory filings, with 43 funds opening new positions, 124 increasing their positions, 135 reducing their positions, and 58 closing their positions.

Holders
369
Holders Change
-23
Holders Change %
-5.87%
% of All Funds
4.96%
Holding in Top 10
4
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
0.05%
New
43
Increased
124
Reduced
135
Closed
58
Calls
$2.02M
Puts
$403K
Net Calls
+$1.62M
Net Calls Change
-$17K

Top Buyers

1
T. Rowe Price Investment Management
1
T. Rowe Price Investment Management
Maryland
$421M
2
Viking Global Investors
2
Viking Global Investors
Connecticut
$129M
3
BlackRock
3
BlackRock
New York
$1.77B
4
Westfield Capital Management
4
Westfield Capital Management
Massachusetts
$199M
5
Massachusetts Financial Services
5
Massachusetts Financial Services
Massachusetts
$416M

Top Sellers

1
Artisan Partners
1
Artisan Partners
Wisconsin
$0
2
Point72 Asset Management
2
Point72 Asset Management
Connecticut
$4.07M
3
Capital Research Global Investors
3
Capital Research Global Investors
California
$312M
4
Dimensional Fund Advisors
4
Dimensional Fund Advisors
Texas
$88M
5
Millennium Management
5
Millennium Management
New York
$657K
Name Market Value Shares Shares
Change 		Shares
Change %
PMAM
76
Picton Mahoney Asset Management
Ontario, Canada
$7.49M 44,557 +405 +0.9%
California State Teachers Retirement System (CalSTRS)
77
California State Teachers Retirement System (CalSTRS)
California
$7.29M 43,353 +101 +0.2%
State Board of Administration of Florida Retirement System
78
State Board of Administration of Florida Retirement System
Florida
$7.29M 43,319 +548 +1%
Walleye Capital
79
Walleye Capital
New York
$7.27M 43,232 -33,138 -43%
NP
80
NS Partners
United Kingdom
$7.16M 42,566 -989 -2%
Amundi
81
Amundi
France
$7.12M 41,583 +416 +1%
Baird Financial Group
82
Baird Financial Group
Wisconsin
$6.85M 40,720 -4,400 -10%
New York State Teachers Retirement System (NYSTRS)
83
New York State Teachers Retirement System (NYSTRS)
New York
$6.74M 40,048 – –
Norges Bank
84
Norges Bank
Norway
$6.57M 39,053 +39,053 New
BM
85
Bridger Management
New York
$5.66M 33,641 -5,659 -14%
GF
86
Gabelli Funds
New York
$5.5M 32,700 -300 -0.9%
IIM
87
INTECH Investment Management
Florida
$5.34M 31,750 -744 -2%
Nordea Investment Management
88
Nordea Investment Management
Sweden
$5.33M 31,868 +5,659 +22%
LCM
89
Logan Capital Management
Pennsylvania
$5.27M 31,352 -11,043 -26%
SEI Investments
90
SEI Investments
Pennsylvania
$5.13M 30,506 -18,859 -38%
Victory Capital Management
91
Victory Capital Management
Texas
$4.94M 29,368 +3,001 +11%
Envestnet Asset Management
92
Envestnet Asset Management
Illinois
$4.58M 27,234 -4,554 -14%
WAM
93
Wilson Asset Management
Australia
$4.58M 27,234 +27,234 New
HCA
94
Harbor Capital Advisors
Illinois
$4.44M 26,412 +26,412 New
MIM
95
MetLife Investment Management
New Jersey
$4.42M 26,285 +645 +3%
Canada Life
96
Canada Life
Manitoba, Canada
$4.39M 26,120 -492 -2%
WP
97
Westmount Partners
California
$4.35M 25,866 -125 -0.5%
Renaissance Technologies
98
Renaissance Technologies
New York
$4.27M 25,377 +10,377 +69%
SDIC
99
South Dakota Investment Council
South Dakota
$4.17M 24,768 – –
AAM
100
Advisors Asset Management
Colorado
$4.1M 24,383 -2,905 -11%
2 3
4
5 6