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Masimo
MASI

Overview Fund Activity

373 hedge funds and large institutions have $9.67B invested in Masimo in 2025 Q2 according to their latest regulatory filings, with 43 funds opening new positions, 126 increasing their positions, 136 reducing their positions, and 58 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
373
Holders Change
-19
Holders Change %
-4.85%
% of All Funds
5%
Holding in Top 10
4
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
0.05%
New
43
Increased
126
Reduced
136
Closed
58
Calls
$10.1M
Puts
$3.87M
Net Calls
+$6.21M
Net Calls Change
+$4.58M

Top Buyers

1
T. Rowe Price Investment Management
T. Rowe Price Investment Management
Maryland
+$139M
2
Viking Global Investors
Viking Global Investors
Connecticut
+$129M
3
BlackRock
BlackRock
New York
+$107M
4
Westfield Capital Management
Westfield Capital Management
Massachusetts
+$85.7M
5
Massachusetts Financial Services
Massachusetts Financial Services
Massachusetts
+$84.5M

Top Sellers

1
Artisan Partners
Artisan Partners
Wisconsin
-$49.8M
2
Point72 Asset Management
Point72 Asset Management
Connecticut
-$49M
3
Capital Research Global Investors
Capital Research Global Investors
California
-$33.7M
4
Dimensional Fund Advisors
Dimensional Fund Advisors
Texas
-$30.3M
5
Millennium Management
Millennium Management
New York
-$22M
Name Holding Trade Value Shares
Change 		Shares
Change %
NMERB
151
New Mexico Educational Retirement Board
New Mexico
$1.67M – – –
KK
152
KLP Kapitalforvaltning
Norway
$1.58M +$84.1K +500 +6%
OPERF
153
Oregon Public Employees Retirement Fund
Oregon
$1.55M +$33.6K +200 +2%
X
154
Xponance
Pennsylvania
$1.55M +$354K +2,105 +30%
TC
155
TownSquare Capital
Utah
$1.52M -$144K -856 -9%
Zurich Cantonal Bank
156
Zurich Cantonal Bank
Switzerland
$1.49M +$111K +662 +8%
AIP
157
Ameritas Investment Partners
Nebraska
$1.47M – – –
BC
158
Birchview Capital
Vermont
$1.39M -$505K -3,000 -27%
OCAM
159
Onex Canada Asset Management
Ontario, Canada
$1.38M -$1.55M -9,231 -53%
DBG
160
De Burlo Group
Massachusetts
$1.36M -$50.5K -300 -4%
MUAMU
161
Mitsubishi UFJ Asset Management (UK)
United Kingdom
$1.35M – – –
ET
162
Entropy Technologies
New York
$1.35M +$1.04M +6,197 +344%
LPL Financial
163
LPL Financial
California
$1.23M +$378K +2,248 +44%
Marshall Wace
164
Marshall Wace
United Kingdom
$1.21M -$634K -3,766 -34%
STA
165
Summit Trail Advisors
New York
$1.2M +$1.2M +7,160 New
Pathstone Holdings
166
Pathstone Holdings
New Jersey
$1.19M +$270K +1,604 +29%
LCM
167
Landscape Capital Management
New Jersey
$1.18M +$342K +2,031 +41%
EGM
168
Engineers Gate Manager
New York
$1.16M -$148K -881 -11%
BC
169
Bayforest Capital
United Kingdom
$1.13M +$1.13M +6,705 New
Pictet Asset Management
170
Pictet Asset Management
Switzerland
$1.12M -$18.8K -112 -2%
Universal-Beteiligungs- und Servicegesellschaft
171
Universal-Beteiligungs- und Servicegesellschaft
Germany
$1.12M +$39.5K +235 +4%
VPIM
172
Vanguard Personalized Indexing Management
California
$1.08M +$122K +726 +13%
PNC Financial Services Group
173
PNC Financial Services Group
Pennsylvania
$1.08M +$120K +714 +13%
Deutsche Bank
174
Deutsche Bank
Germany
$1.06M +$505 +3 +0%
GC
175
Guggenheim Capital
Illinois
$954K -$115K -683 -11%
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