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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 %
AWG
51
Alpha Wave Global
New York
$17.2M +$17.2M +102,068 New
First Trust Advisors
52
First Trust Advisors
Illinois
$16.8M -$7.66M -45,552 -31%
CRM
53
Cramer Rosenthal McGlynn
Connecticut
$16M -$9.54M -56,725 -37%
PHS
54
PFM Health Sciences
California
$15.9M +$15.9M +94,451 New
EAM
55
Erste Asset Management
Austria
$15.5M – – –
BG
56
Bellevue Group
Switzerland
$15.1M +$3.34M +19,865 +28%
Swiss National Bank
57
Swiss National Bank
Switzerland
$14.8M -$84.1K -500 -0.6%
BDLIB
58
Banque de Luxembourg Investments (BLI)
Luxembourg
$14.6M -$2.44M -14,500 -14%
GI
59
GAMCO Investors
Connecticut
$14.2M – – –
GLA
60
Great Lakes Advisors
Illinois
$13.9M -$1.77M -10,524 -11%
Squarepoint
61
Squarepoint
New York
$12.5M +$9.65M +57,359 +344%
Swedbank
62
Swedbank
Sweden
$12.4M -$353K -2,100 -3%
California Public Employees Retirement System
63
California Public Employees Retirement System
California
$12.2M +$493K +2,932 +4%
PD
64
Point72 (DIFC)
United Arab Emirates
$11.6M +$4.55M +27,061 +65%
BNP Paribas Asset Management
65
BNP Paribas Asset Management
France
$11.1M +$11.1M +65,821 New
Manulife (Manufacturers Life Insurance)
66
Manulife (Manufacturers Life Insurance)
Ontario, Canada
$9.88M +$810K +4,814 +9%
Fidelity International
67
Fidelity International
Bermuda
$9.48M -$19.1M -113,462 -67%
Barclays
68
Barclays
United Kingdom
$9.44M +$2.74M +16,261 +41%
SO
69
STRS Ohio
Ohio
$9.42M +$2.67M +15,848 +39%
Retirement Systems of Alabama
70
Retirement Systems of Alabama
Alabama
$9.25M +$154K +916 +2%
Bank of Nova Scotia
71
Bank of Nova Scotia
Ontario, Canada
$8.93M -$6.74M -40,095 -43%
AQR Capital Management
72
AQR Capital Management
Connecticut
$8.45M +$7.08M +42,114 +517%
Citigroup
73
Citigroup
New York
$8.4M -$369K -2,196 -4%
CCM
74
Cinctive Capital Management
New York
$7.87M +$7.87M +46,787 New
N
75
Natixis
France
$7.68M +$7.68M +45,648 New
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