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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 %
Bank of America
26
Bank of America
North Carolina
$52.8M +$34.9M +209,340 +195%
Point72 Asset Management
27
Point72 Asset Management
Connecticut
$52.5M +$11.1M +66,923 +27%
Artisan Partners
28
Artisan Partners
Wisconsin
$49.8M +$49.8M +299,023 New
T. Rowe Price Associates
29
T. Rowe Price Associates
Maryland
$47.1M +$5.31M +31,851 +13%
Goldman Sachs
30
Goldman Sachs
New York
$46.7M +$13M +78,003 +39%
Invesco
31
Invesco
Georgia
$43.5M -$2.77M -16,602 -6%
JPMorgan Chase & Co
32
JPMorgan Chase & Co
New York
$41.1M +$19.6M +117,850 +92%
Ameriprise
33
Ameriprise
Minnesota
$35.3M -$693K -4,160 -2%
Raymond James Financial
34
Raymond James Financial
Florida
$34.3M +$357K +2,145 +1%
UBS AM
35
UBS AM
Illinois
$31.5M -$186K -1,116 -0.6%
UBS Group
36
UBS Group
Switzerland
$28.4M +$1.69M +10,149 +6%
Fidelity International
37
Fidelity International
Bermuda
$28.3M +$9.91M +59,456 +54%
NL
38
Nuveen LLC
North Carolina
$25.8M +$25.8M +155,045 New
CRM
39
Cramer Rosenthal McGlynn
Connecticut
$25.3M -$11.9M -71,153 -32%
First Trust Advisors
40
First Trust Advisors
Illinois
$24.2M +$16.3M +97,836 +207%
GAM
41
Gotham Asset Management
New York
$24.1M +$2.8M +16,810 +13%
Verition Fund Management
42
Verition Fund Management
Connecticut
$24M +$22.7M +136,278 +1,822%
Comerica Bank
43
Comerica Bank
Texas
$23M -$587K -3,523 -2%
Millennium Management
44
Millennium Management
New York
$22.5M -$45.5M -273,252 -67%
WP
45
Woodline Partners
California
$22.2M +$13.6M +81,784 +160%
RhumbLine Advisers
46
RhumbLine Advisers
Massachusetts
$20.5M -$260K -1,562 -1%
Rockefeller Capital Management
47
Rockefeller Capital Management
New York
$19.5M +$4.4M +26,425 +29%
TI
48
Tidal Investments
Wisconsin
$18.4M +$3.96M +23,755 +27%
Principal Financial Group
49
Principal Financial Group
Iowa
$17.1M +$167 +1 +0%
Legal & General Group
50
Legal & General Group
United Kingdom
$16.6M +$392K +2,355 +2%
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