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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 %
YCM
126
Yousif Capital Management
Michigan
$2.63M -$61.5K -369 -2%
PFSRSONJ
127
Police & Firemen's Retirement System of New Jersey
New Jersey
$2.62M +$25.8K +155 +1%
Brown Advisory
128
Brown Advisory
Maryland
$2.58M -$5.5K -33 -0.2%
Ensign Peak Advisors
129
Ensign Peak Advisors
Utah
$2.52M +$42.8K +257 +2%
Renaissance Technologies
130
Renaissance Technologies
New York
$2.5M +$2.5M +15,000 New
TRSOTSOK
131
Teachers Retirement System of the State of Kentucky
Kentucky
$2.46M – – –
Empower Advisory Group
132
Empower Advisory Group
Colorado
$2.34M – – –
Ohio Public Employees Retirement System (OPERS)
133
Ohio Public Employees Retirement System (OPERS)
Ohio
$2.29M -$258K -1,550 -10%
ACM
134
Aster Capital Management
United Arab Emirates
$2.25M +$2.25M +11,912 New
Teacher Retirement System of Texas
135
Teacher Retirement System of Texas
Texas
$2.21M -$612K -3,671 -22%
LFG
136
Lockerman Financial Group
California
$2.18M -$83.3K -500 -4%
ASRS
137
Arizona State Retirement System
Arizona
$2.17M -$25.8K -155 -1%
Handelsbanken Fonder
138
Handelsbanken Fonder
Sweden
$2.15M – – –
LSERS
139
Louisiana State Employees Retirement System
Louisiana
$2.07M +$16.7K +100 +0.8%
Franklin Resources
140
Franklin Resources
California
$2.05M +$1.56M +9,361 +320%
VOYA Investment Management
141
VOYA Investment Management
Georgia
$2.04M -$47.5K -285 -2%
Mirae Asset Global ETFs Holdings
142
Mirae Asset Global ETFs Holdings
Hong Kong
$1.89M +$11K +66 +0.6%
PCMI
143
Paradigm Capital Management Inc
New York
$1.89M – – –
BC
144
Birchview Capital
Vermont
$1.88M -$666K -4,000 -26%
WSFS
145
Wilmington Savings Fund Society
Delaware
$1.87M -$413K -2,477 -18%
Creative Planning
146
Creative Planning
Kansas
$1.87M -$496K -2,979 -21%
Marshall Wace
147
Marshall Wace
United Kingdom
$1.83M -$386K -2,315 -17%
COPPSERS
148
Commonwealth of Pennsylvania Public School Employees Retirement System
Pennsylvania
$1.77M +$135K +808 +8%
SOMRS
149
State of Michigan Retirement System
Michigan
$1.77M +$16.7K +100 +1%
Thrivent Financial for Lutherans
150
Thrivent Financial for Lutherans
Minnesota
$1.74M -$6.17K -37 -0.4%
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