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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 %
Allianz Asset Management
401
Allianz Asset Management
Germany
– -$319K -1,912 Closed
SWM
402
SeaCrest Wealth Management
New York
– -$307K -1,840 Closed
SOS
403
Silver Oak Securities
Tennessee
– -$268K -1,638 Closed
AIM
404
Aigen Investment Management
New York
– -$271K -1,627 Closed
Cetera Investment Advisers
405
Cetera Investment Advisers
Illinois
– -$267K -1,600 Closed
PA
406
PharVision Advisers
Florida
– -$235K -1,410 Closed
DTL
407
Dynamic Technology Lab
Singapore
– -$220K -1,320 Closed
JG
408
Jain Global
New York
– -$212K -1,274 Closed
BC
409
Barrett & Company
Rhode Island
– -$94.4K -567 Closed
PAS
410
Point72 Asia (Singapore)
Singapore
– -$78.1K -469 Closed
QL
411
Quarry LP
New York
– -$74.8K -449 Closed
AFS
412
Anderson Financial Strategies
Ohio
– -$49.1K -295 Closed
WT
413
Washington Trust
Rhode Island
– -$30.7K -184 Closed
Twin Tree Management
414
Twin Tree Management
Texas
– -$29.2K -175 Closed
RTC
415
Riverview Trust Company
Washington
– -$28.2K -169 Closed
Acadian Asset Management
416
Acadian Asset Management
Massachusetts
– -$23K -143 Closed
SIS
417
Sound Income Strategies
Florida
– -$14.2K -85 Closed
TWC
418
TD Waterhouse Canada
Ontario, Canada
– -$8.34K -50 Closed
MAM
419
Meeder Asset Management
Ohio
– -$2.33K -14 Closed
WAM
420
WFA Asset Management
Wisconsin
– -$1.76K -12 Closed
PWAM
421
Private Wealth Asset Management
Iowa
– -$1K -6 Closed
MG
422
Mather Group
Illinois
– -$1K -6 Closed
QC
423
Quent Capital
New York
– -$1K -6 Closed
GFPC
424
Global Financial Private Client
Florida
– -$833 -5 Closed
CA
425
CoreCap Advisors
Michigan
– -$666 -4 Closed
14 15 16
17
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