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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 %
CFD
376
Creative Financial Designs
Indiana
$833 +$833 +5 New
HFS
377
Hughes Financial Services
Virginia
$670 +$670 +4 New
PWMG
378
Prestige Wealth Management Group
New Jersey
$667 – – –
CA
379
CoreCap Advisors
Michigan
$666 -$13.8K -83 -95%
HWP
380
Highline Wealth Partners
California
$666 +$666 +4 New
SOW
381
State of Wyoming
Wyoming
$500 -$153K -920 -100%
BFS
382
Bare Financial Services
Pennsylvania
$500 +$500 +3 New
GP
383
Greenline Partners
New York
$500 +$500 +3 New
CFP
384
Comprehensive Financial Planning
Pennsylvania
$333 – – –
RIL
385
Rothschild Investment LLC
Illinois
$167 – – –
PWM
386
Parkworth Wealth Management
California
$167 – – –
ACA
387
American Capital Advisory
Idaho
$167 +$167 +1 New
CT
388
Clearstead Trust
Maine
$167 +$167 +1 New
HIA
389
HFM Investment Advisors
New Jersey
$167 +$167 +1 New
BHWM
390
Bay Harbor Wealth Management
Maryland
$166 +$166 +1 New
FCM
391
Farallon Capital Management
California
– -$65.6M -397,000 Closed
CCM
392
Catalio Capital Management
New York
– -$14.4M -87,377 Closed
Man Group
393
Man Group
United Kingdom
– -$10.7M -64,889 Closed
AMG
394
Ace Management Global
Brazil
– -$7.88M -47,694 Closed
LP
395
LMR Partners
United Kingdom
– -$7.02M -42,448 Closed
ACM
396
Atika Capital Management
New York
– -$6.08M -36,800 Closed
Norges Bank
397
Norges Bank
Norway
– -$5.52M -33,394 Closed
CCM
398
Cinctive Capital Management
New York
– -$4.16M -25,176 Closed
AAIS
399
ABN AMRO Investment Solutions
– -$3.05M -18,473 Closed
JFG
400
Jefferies Financial Group
New York
– -$1.76M -10,657 Closed
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