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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 %
MSRPS
251
Maryland State Retirement & Pension System
Maryland
$338K -$69.8K -419 -17%
AV
252
Alamea Verwaltungs
New Jersey
$327K +$327K +1,963 New
Allianz Asset Management
253
Allianz Asset Management
Germany
$319K +$5.5K +33 +2%
NSAM
254
North Star Asset Management
Wisconsin
$318K -$109K -655 -26%
ProShare Advisors
255
ProShare Advisors
Maryland
$316K -$30.7K -184 -9%
SWM
256
SeaCrest Wealth Management
New York
$307K +$8.33K +50 +3%
ET
257
Entropy Technologies
New York
$300K +$300K +1,803 New
Janney Montgomery Scott
258
Janney Montgomery Scott
Pennsylvania
$294K -$265K -1,590 -47%
CIBC Asset Management
259
CIBC Asset Management
Ontario, Canada
$278K +$6.33K +38 +2%
SCM
260
Shelton Capital Management
Colorado
$274K -$11.5K -69 -4%
OSAM
261
O'Shaughnessy Asset Management
Connecticut
$272K -$4.95M -29,740 -95%
AIM
262
Aigen Investment Management
New York
$271K +$271K +1,627 New
P
263
Pitcairn
Pennsylvania
$271K -$833 -5 -0.3%
SG Americas Securities
264
SG Americas Securities
New York
$270K +$270K +1,623 New
MGP
265
M&G plc
United Kingdom
$269K – – –
SOS
266
Silver Oak Securities
Tennessee
$268K +$268K +1,638 New
MWM
267
Mission Wealth Management
California
$267K – – –
Cetera Investment Advisers
268
Cetera Investment Advisers
Illinois
$267K -$41K -246 -13%
CI
269
Corient IA
Florida
$250K +$250K +1,500 New
VCM
270
Versant Capital Management
Arizona
$247K +$237K +1,424 +2,543%
AssetMark Inc
271
AssetMark Inc
California
$244K +$50K +300 +26%
AW
272
Apricus Wealth
South Carolina
$244K +$26.5K +159 +12%
FTWA
273
Fifth Third Wealth Advisors
Ohio
$243K +$666 +4 +0.3%
CL
274
Choreo LLC
Illinois
$239K +$239K +1,433 New
PA
275
PharVision Advisers
Florida
$235K +$235K +1,410 New
9 10
11
12 13