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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 %
CF
376
Corebridge Financial
Texas
– -$8.22M -49,327 Closed
IHAM
377
Integral Health Asset Management
New York
– -$7.5M -45,000 Closed
LCG
378
Lisanti Capital Growth
New York
– -$5.08M -30,485 Closed
RG
379
Redmile Group
California
– -$4.34M -26,062 Closed
EI
380
EAM Investors
California
– -$3.82M -22,952 Closed
ACM
381
Aquatic Capital Management
Illinois
– -$2.9M -17,388 Closed
ACM
382
Aster Capital Management
United Arab Emirates
– -$2.25M -11,912 Closed
NICM
383
Neo Ivy Capital Management
New York
– -$1.71M -10,248 Closed
VRS
384
Virginia Retirement Systems
Virginia
– -$1.7M -10,197 Closed
FCM
385
Fieldview Capital Management
Michigan
– -$1.45M -8,675 Closed
CC
386
Centiva Capital
New York
– -$1.25M -7,530 Closed
VI
387
Versor Investments
New York
– -$1.16M -6,978 Closed
SPC
388
Sigma Planning Corp
Michigan
– -$1.06M -6,365 Closed
PCH
389
Polar Capital Holdings
United Kingdom
– -$1M -6,023 Closed
BCM
390
Bayesian Capital Management
New York
– -$1,000K -6,000 Closed
LCM
391
Legato Capital Management
California
– -$874K -5,245 Closed
PHK
392
Point72 Hong Kong
Hong Kong
– -$808K -4,852 Closed
QIM
393
Quantitative Investment Management
Virginia
– -$743K -4,462 Closed
PI
394
PineBridge Investments
New York
– -$659K -3,954 Closed
SC
395
SummitTX Capital
Texas
– -$629K -3,773 Closed
I
396
InceptionR
California
– -$597K -3,583 Closed
Lido Advisors
397
Lido Advisors
California
– -$521K -3,127 Closed
USAA
398
United Services Automobile Association
Texas
– -$476K -2,912 Closed
KPWS
399
Kestra Private Wealth Services
Texas
– -$482K -2,892 Closed
Mariner
400
Mariner
Kansas
– -$400K -2,405 Closed
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16
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