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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 %
Cetera Investment Advisers
401
Cetera Investment Advisers
Illinois
– – -1,600 Closed
PA
402
PharVision Advisers
Florida
– – -1,410 Closed
DTL
403
Dynamic Technology Lab
Singapore
– – -1,320 Closed
JG
404
Jain Global
New York
– – -1,274 Closed
BC
405
Barrett & Company
Rhode Island
– – -567 Closed
PAS
406
Point72 Asia (Singapore)
Singapore
– – -469 Closed
QL
407
Quarry LP
New York
– – -449 Closed
AFS
408
Anderson Financial Strategies
Ohio
– – -295 Closed
WT
409
Washington Trust
Rhode Island
– – -184 Closed
Twin Tree Management
410
Twin Tree Management
Texas
– – -175 Closed
RTC
411
Riverview Trust Company
Washington
– – -169 Closed
Acadian Asset Management
412
Acadian Asset Management
Massachusetts
– – -143 Closed
SIS
413
Sound Income Strategies
Florida
– – -85 Closed
TWC
414
TD Waterhouse Canada
Ontario, Canada
– – -50 Closed
MAM
415
Meeder Asset Management
Ohio
– – -14 Closed
WAM
416
WFA Asset Management
Wisconsin
– – -12 Closed
PWAM
417
Private Wealth Asset Management
Iowa
– – -6 Closed
MG
418
Mather Group
Illinois
– – -6 Closed
QC
419
Quent Capital
New York
– – -6 Closed
GFPC
420
Global Financial Private Client
Florida
– – -5 Closed
CA
421
CoreCap Advisors
Michigan
– – -4 Closed
SOW
422
State of Wyoming
Wyoming
– – -3 Closed
GP
423
Greenline Partners
New York
– – -3 Closed
AW
424
Avion Wealth
Texas
– – -2 Closed
CT
425
Clearstead Trust
Maine
– – -1 Closed
14 15 16
17
18