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Masimo
MASI

Overview Fund Activity

373 hedge funds and large institutions have $9.67B invested in Masimo in 2025 Q2 according to their latest regulatory filings, with 43 funds opening new positions, 126 increasing their positions, 136 reducing their positions, and 58 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
373
Holders Change
-19
Holders Change %
-4.85%
% of All Funds
5%
Holding in Top 10
4
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
0.05%
New
43
Increased
126
Reduced
136
Closed
58
Calls
$10.1M
Puts
$3.87M
Net Calls
+$6.21M
Net Calls Change
+$4.58M

Top Buyers

1
T. Rowe Price Investment Management
T. Rowe Price Investment Management
Maryland
+$139M
2
Viking Global Investors
Viking Global Investors
Connecticut
+$129M
3
BlackRock
BlackRock
New York
+$107M
4
Westfield Capital Management
Westfield Capital Management
Massachusetts
+$85.7M
5
Massachusetts Financial Services
Massachusetts Financial Services
Massachusetts
+$84.5M

Top Sellers

1
Artisan Partners
Artisan Partners
Wisconsin
-$49.8M
2
Point72 Asset Management
Point72 Asset Management
Connecticut
-$49M
3
Capital Research Global Investors
Capital Research Global Investors
California
-$33.7M
4
Dimensional Fund Advisors
Dimensional Fund Advisors
Texas
-$30.3M
5
Millennium Management
Millennium Management
New York
-$22M
Name Holding Trade Value Shares
Change 		Shares
Change %
BAMCO Inc
26
BAMCO Inc
New York
$64.7M +$11.3M +67,307 +21%
Charles Schwab
27
Charles Schwab
California
$62.4M -$1.07M -6,336 -2%
Corient Private Wealth
28
Corient Private Wealth
Florida
$55.6M -$2.96M -17,624 -5%
Bank of New York Mellon
29
Bank of New York Mellon
New York
$53.4M -$2.44M -14,515 -4%
Grantham, Mayo, Van Otterloo & Co (GMO)
30
Grantham, Mayo, Van Otterloo & Co (GMO)
Massachusetts
$40.5M +$40.5M +240,563 New
Invesco
31
Invesco
Georgia
$39.9M -$4.05M -24,055 -9%
UBS AM
32
UBS AM
Illinois
$35.3M +$3.44M +20,433 +11%
Raymond James Financial
33
Raymond James Financial
Florida
$33.7M -$990K -5,887 -3%
Bank of America
34
Bank of America
North Carolina
$32M -$21.3M -126,467 -40%
Comerica Bank
35
Comerica Bank
Texas
$31.9M +$8.74M +51,967 +38%
WP
36
Woodline Partners
California
$30.7M +$8.37M +49,740 +37%
TD Asset Management
37
TD Asset Management
Ontario, Canada
$28.1M +$13.2M +78,508 +89%
GAM
38
Gotham Asset Management
New York
$27.8M +$3.49M +20,766 +14%
American Century Companies
39
American Century Companies
Missouri
$25.6M +$12.3M +73,052 +92%
NL
40
Nuveen LLC
North Carolina
$25.2M -$906K -5,387 -3%
HRCM
41
Hawk Ridge Capital Management
California
$25M +$25M +148,685 New
UBS Group
42
UBS Group
Switzerland
$23.9M -$4.71M -28,013 -16%
JPMorgan Chase & Co
43
JPMorgan Chase & Co
New York
$23.2M -$18.2M -108,399 -44%
RhumbLine Advisers
44
RhumbLine Advisers
Massachusetts
$21.4M +$788K +4,685 +4%
QCM
45
Quantinno Capital Management
New York
$20.3M +$9.53M +56,644 +89%
Rockefeller Capital Management
46
Rockefeller Capital Management
New York
$19.5M -$286K -1,700 -1%
Royal Bank of Canada
47
Royal Bank of Canada
Ontario, Canada
$18.5M +$11.1M +65,806 +150%
TI
48
Tidal Investments
Wisconsin
$17.9M -$721K -4,288 -4%
Legal & General Group
49
Legal & General Group
United Kingdom
$17.6M +$811K +4,822 +5%
Principal Financial Group
50
Principal Financial Group
Iowa
$17.2M -$32.6K -194 -0.2%
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