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Masimo
MASI

Overview Fund Activity

392 hedge funds and large institutions have $9.03B invested in Masimo in 2025 Q1 according to their latest regulatory filings, with 80 funds opening new positions, 134 increasing their positions, 117 reducing their positions, and 47 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
392
Holders Change
+29
Holders Change %
+7.99%
% of All Funds
5.32%
Holding in Top 10
4
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
0.05%
New
80
Increased
134
Reduced
117
Closed
47
Calls
$7.35M
Puts
$5.71M
Net Calls
+$1.63M
Net Calls Change
-$7.13M

Top Buyers

1
BlackRock
BlackRock
New York
+$195M
2
DCP
Durable Capital Partners
Maryland
+$188M
3
Holocene Advisors
Holocene Advisors
New York
+$82.9M
4
Artisan Partners
Artisan Partners
Wisconsin
+$49.8M
5
Massachusetts Financial Services
Massachusetts Financial Services
Massachusetts
+$38.8M

Top Sellers

1
Capital Research Global Investors
Capital Research Global Investors
California
-$66.5M
2
FCM
Farallon Capital Management
California
-$65.6M
3
Citadel Advisors
Citadel Advisors
Florida
-$65.2M
4
Millennium Management
Millennium Management
New York
-$45.5M
5
Assenagon Asset Management
Assenagon Asset Management
Luxembourg
-$35.3M
Name Holding Trade Value Shares
Change 		Shares
Change %
LAM
401
LECAP Asset Management
United Kingdom
– -$1.61M -9,720 Closed
HF
402
HRT Financial
New York
– -$1.33M -8,033 Closed
Pacer Advisors
403
Pacer Advisors
Pennsylvania
– -$1.07M -6,452 Closed
NA
404
Navellier & Associates
Nevada
– -$1.04M -6,310 Closed
Nomura Holdings
405
Nomura Holdings
Japan
– -$975K -5,897 Closed
HSBC Holdings
406
HSBC Holdings
United Kingdom
– -$912K -5,494 Closed
Two Sigma Advisers
407
Two Sigma Advisers
New York
– -$744K -4,500 Closed
WG
408
Winton Group
United Kingdom
– -$729K -4,410 Closed
Healthcare of Ontario Pension Plan (HOOPP) Trust Fund
409
Healthcare of Ontario Pension Plan (HOOPP) Trust Fund
Ontario, Canada
– -$593K -3,587 Closed
FC
410
Farringdon Capital
United Kingdom
– -$532K -3,217 Closed
PEAK6
411
PEAK6
Illinois
– -$528K -3,196 Closed
DCM
412
DAFNA Capital Management
California
– -$496K -3,000 Closed
AWM
413
AE Wealth Management
Kansas
– -$471K -2,852 Closed
FGP
414
Freestone Grove Partners
California
– -$357K -2,162 Closed
Commonwealth Equity Services
415
Commonwealth Equity Services
Massachusetts
– -$354K -2,139 Closed
CCIA
416
Campbell & Co Investment Adviser
Maryland
– -$344K -2,083 Closed
CM
417
Crestline Management
Texas
– -$298K -1,800 Closed
Cerity Partners
418
Cerity Partners
New York
– -$263K -1,792 Closed
PPWM
419
Perissos Private Wealth Management
Oklahoma
– -$281K -1,700 Closed
Envestnet Portfolio Solutions
420
Envestnet Portfolio Solutions
Illinois
– -$249K -1,505 Closed
BCM
421
Brown Capital Management
Maryland
– -$245K -1,481 Closed
VF
422
Virtu Financial
New York
– -$244K -1,478 Closed
TPI
423
Trust Point Inc
Wisconsin
– -$230K -1,390 Closed
PPA
424
Pacific Point Advisors
California
– -$208K -1,184 Closed
BAMF
425
BI Asset Management Fondsmaeglerselskab
Denmark
– -$163K -985 Closed
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