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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 %
EI
376
EAM Investors
California
– – -22,952 Closed
ACM
377
Aquatic Capital Management
Illinois
– – -17,388 Closed
ACM
378
Aster Capital Management
United Arab Emirates
– – -11,912 Closed
NICM
379
Neo Ivy Capital Management
New York
– – -10,248 Closed
VRS
380
Virginia Retirement Systems
Virginia
– – -10,197 Closed
FCM
381
Fieldview Capital Management
Michigan
– – -8,675 Closed
CC
382
Centiva Capital
New York
– – -7,530 Closed
VI
383
Versor Investments
New York
– – -6,978 Closed
SPC
384
Sigma Planning Corp
Michigan
– – -6,365 Closed
PCH
385
Polar Capital Holdings
United Kingdom
– – -6,023 Closed
BCM
386
Bayesian Capital Management
New York
– – -6,000 Closed
LCM
387
Legato Capital Management
California
– – -5,245 Closed
PHK
388
Point72 Hong Kong
Hong Kong
– – -4,852 Closed
QIM
389
Quantitative Investment Management
Virginia
– – -4,462 Closed
PI
390
PineBridge Investments
New York
– – -3,954 Closed
SC
391
SummitTX Capital
Texas
– – -3,773 Closed
I
392
InceptionR
California
– – -3,583 Closed
Lido Advisors
393
Lido Advisors
California
– – -3,127 Closed
USAA
394
United Services Automobile Association
Texas
– – -2,912 Closed
KPWS
395
Kestra Private Wealth Services
Texas
– – -2,892 Closed
Mariner
396
Mariner
Kansas
– – -2,405 Closed
Allianz Asset Management
397
Allianz Asset Management
Germany
– – -1,912 Closed
SWM
398
SeaCrest Wealth Management
New York
– – -1,840 Closed
SOS
399
Silver Oak Securities
Tennessee
– – -1,638 Closed
AIM
400
Aigen Investment Management
New York
– – -1,627 Closed
14 15
16
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