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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 %
Charles Schwab
26
Charles Schwab
California
$62.4M 370,734 -6,336 -2%
Corient Private Wealth
27
Corient Private Wealth
Florida
$55.6M 330,414 -17,624 -5%
Bank of New York Mellon
28
Bank of New York Mellon
New York
$53.4M 317,593 -14,515 -4%
Grantham, Mayo, Van Otterloo & Co (GMO)
29
Grantham, Mayo, Van Otterloo & Co (GMO)
Massachusetts
$40.5M 240,563 +240,563 New
Invesco
30
Invesco
Georgia
$39.9M 237,303 -24,055 -9%
UBS AM
31
UBS AM
Illinois
$35.3M 209,563 +20,433 +11%
Raymond James Financial
32
Raymond James Financial
Florida
$33.7M 200,229 -5,887 -3%
Bank of America
33
Bank of America
North Carolina
$32M 190,176 -126,467 -40%
Comerica Bank
34
Comerica Bank
Texas
$31.9M 189,822 +51,967 +38%
WP
35
Woodline Partners
California
$30.7M 182,709 +49,740 +37%
TD Asset Management
36
TD Asset Management
Ontario, Canada
$28.1M 167,176 +78,508 +89%
GAM
37
Gotham Asset Management
New York
$27.8M 165,356 +20,766 +14%
American Century Companies
38
American Century Companies
Missouri
$25.6M 152,228 +73,052 +92%
NL
39
Nuveen LLC
North Carolina
$25.2M 149,658 -5,387 -3%
HRCM
40
Hawk Ridge Capital Management
California
$25M 148,685 +148,685 New
UBS Group
41
UBS Group
Switzerland
$23.9M 142,164 -28,013 -16%
JPMorgan Chase & Co
42
JPMorgan Chase & Co
New York
$23.2M 138,090 -108,399 -44%
RhumbLine Advisers
43
RhumbLine Advisers
Massachusetts
$21.4M 127,496 +4,685 +4%
QCM
44
Quantinno Capital Management
New York
$20.3M 120,383 +56,644 +89%
Rockefeller Capital Management
45
Rockefeller Capital Management
New York
$19.5M 115,626 -1,700 -1%
Royal Bank of Canada
46
Royal Bank of Canada
Ontario, Canada
$18.5M 109,690 +65,806 +150%
TI
47
Tidal Investments
Wisconsin
$17.9M 106,198 -4,288 -4%
Legal & General Group
48
Legal & General Group
United Kingdom
$17.6M 104,364 +4,822 +5%
Principal Financial Group
49
Principal Financial Group
Iowa
$17.2M 102,467 -194 -0.2%
AWG
50
Alpha Wave Global
New York
$17.2M 102,068 +102,068 New
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