MASI icon

Masimo
MASI

Overview Fund Activity

392 hedge funds and large institutions have $9.03B invested in Masimo in 2025 Q1 according to their latest regulatory filings, with 80 funds opening new positions, 134 increasing their positions, 117 reducing their positions, and 47 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
392
Holders Change
+29
Holders Change %
+7.99%
% of All Funds
5.32%
Holding in Top 10
4
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
0.05%
New
80
Increased
134
Reduced
117
Closed
47
Calls
$7.35M
Puts
$5.71M
Net Calls
+$1.63M
Net Calls Change
-$7.13M

Top Buyers

1
BlackRock
BlackRock
New York
+$195M
2
DCP
Durable Capital Partners
Maryland
+$188M
3
Holocene Advisors
Holocene Advisors
New York
+$82.9M
4
Artisan Partners
Artisan Partners
Wisconsin
+$49.8M
5
Massachusetts Financial Services
Massachusetts Financial Services
Massachusetts
+$38.8M

Top Sellers

1
Capital Research Global Investors
Capital Research Global Investors
California
-$66.5M
2
FCM
Farallon Capital Management
California
-$65.6M
3
Citadel Advisors
Citadel Advisors
Florida
-$65.2M
4
Millennium Management
Millennium Management
New York
-$45.5M
5
Assenagon Asset Management
Assenagon Asset Management
Luxembourg
-$35.3M
Name Holding Trade Value Shares
Change 		Shares
Change %
Victory Capital Management
101
Victory Capital Management
Texas
$4.39M +$2.89M +17,363 +193%
RG
102
Redmile Group
California
$4.34M +$4.34M +26,062 New
WP
103
Westmount Partners
California
$4.33M – – –
MIM
104
MetLife Investment Management
New Jersey
$4.27M -$64.3K -386 -1%
Nordea Investment Management
105
Nordea Investment Management
Sweden
$4.22M +$1.13M +7,027 +37%
Two Sigma Investments
106
Two Sigma Investments
New York
$4.19M -$2.45M -14,724 -37%
SDIC
107
South Dakota Investment Council
South Dakota
$4.13M -$973K -5,843 -19%
New York State Common Retirement Fund
108
New York State Common Retirement Fund
New York
$4.03M -$500 -3 -0%
Calamos Advisors
109
Calamos Advisors
Illinois
$3.91M +$1.19M +7,169 +44%
EI
110
EAM Investors
California
$3.82M +$3.82M +22,952 New
MOACM
111
Mutual of America Capital Management
New York
$3.81M -$100K -603 -3%
AB
112
Amalgamated Bank
New York
$3.44M -$107K -642 -3%
SCM
113
Sterling Capital Management
North Carolina
$3.43M -$935K -5,615 -21%
CCMINC
114
Cardinal Capital Management Inc (North Carolina)
North Carolina
$3.31M +$191K +1,148 +6%
Treasurer of the State of North Carolina
115
Treasurer of the State of North Carolina
North Carolina
$3.31M +$128K +770 +4%
Janus Henderson Group
116
Janus Henderson Group
United Kingdom
$3.27M -$164K -1,000 -5%
Wells Fargo
117
Wells Fargo
California
$3.08M -$204K -1,226 -6%
State of Tennessee, Department of Treasury
118
State of Tennessee, Department of Treasury
Tennessee
$3.03M +$478K +2,870 +19%
OCAM
119
Onex Canada Asset Management
Ontario, Canada
$2.91M -$3.27M -19,606 -53%
ACM
120
Aquatic Capital Management
Illinois
$2.9M +$2.9M +17,388 New
Squarepoint
121
Squarepoint
New York
$2.78M +$2.78M +16,668 New
State of Wisconsin Investment Board
122
State of Wisconsin Investment Board
Wisconsin
$2.75M -$67.3K -404 -2%
BHCM
123
Brevan Howard Capital Management
Jersey
$2.67M +$2.67M +16,019 New
State of New Jersey Common Pension Fund D
124
State of New Jersey Common Pension Fund D
New Jersey
$2.64M -$145K -869 -5%
Canada Pension Plan Investment Board
125
Canada Pension Plan Investment Board
Ontario, Canada
$2.63M -$50K -300 -2%
3 4
5
6 7