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Masimo
MASI

Overview Fund Activity

369 hedge funds and large institutions have $9.59B invested in Masimo in 2025 Q2 according to their latest regulatory filings, with 43 funds opening new positions, 124 increasing their positions, 135 reducing their positions, and 58 closing their positions.

Holders
369
Holders Change
-23
Holders Change %
-5.87%
% of All Funds
4.96%
Holding in Top 10
4
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
0.05%
New
43
Increased
124
Reduced
135
Closed
58
Calls
$2.02M
Puts
$403K
Net Calls
+$1.62M
Net Calls Change
-$17K

Top Buyers

1
T. Rowe Price Investment Management
1
T. Rowe Price Investment Management
Maryland
$421M
2
Viking Global Investors
2
Viking Global Investors
Connecticut
$129M
3
BlackRock
3
BlackRock
New York
$1.77B
4
Westfield Capital Management
4
Westfield Capital Management
Massachusetts
$199M
5
Massachusetts Financial Services
5
Massachusetts Financial Services
Massachusetts
$416M

Top Sellers

1
Artisan Partners
1
Artisan Partners
Wisconsin
$0
2
Point72 Asset Management
2
Point72 Asset Management
Connecticut
$4.07M
3
Capital Research Global Investors
3
Capital Research Global Investors
California
$312M
4
Dimensional Fund Advisors
4
Dimensional Fund Advisors
Texas
$88M
5
Millennium Management
5
Millennium Management
New York
$657K
Name Market Value Shares Shares
Change 		Shares
Change %
OPERF
151
Oregon Public Employees Retirement Fund
Oregon
$1.55M 9,219 +200 +2%
X
152
Xponance
Pennsylvania
$1.55M 9,206 +2,105 +30%
TC
153
TownSquare Capital
Utah
$1.52M 9,014 -856 -9%
Zurich Cantonal Bank
154
Zurich Cantonal Bank
Switzerland
$1.49M 8,857 +662 +8%
AIP
155
Ameritas Investment Partners
Nebraska
$1.47M 8,744 – –
BC
156
Birchview Capital
Vermont
$1.39M 8,280 -3,000 -27%
OCAM
157
Onex Canada Asset Management
Ontario, Canada
$1.38M 8,224 -9,231 -53%
DBG
158
De Burlo Group
Massachusetts
$1.36M 8,102 -300 -4%
MUAMU
159
Mitsubishi UFJ Asset Management (UK)
United Kingdom
$1.35M 8,000 – –
ET
160
Entropy Technologies
New York
$1.35M 8,000 +6,197 +344%
LPL Financial
161
LPL Financial
California
$1.23M 7,304 +2,248 +44%
Marshall Wace
162
Marshall Wace
United Kingdom
$1.21M 7,208 -3,766 -34%
STA
163
Summit Trail Advisors
New York
$1.2M 7,160 +7,160 New
Pathstone Holdings
164
Pathstone Holdings
New Jersey
$1.19M 7,099 +1,604 +29%
LCM
165
Landscape Capital Management
New Jersey
$1.18M 7,029 +2,031 +41%
EGM
166
Engineers Gate Manager
New York
$1.16M 6,873 -881 -11%
BC
167
Bayforest Capital
United Kingdom
$1.13M 6,705 +6,705 New
Pictet Asset Management
168
Pictet Asset Management
Switzerland
$1.12M 6,679 -112 -2%
Universal-Beteiligungs- und Servicegesellschaft
169
Universal-Beteiligungs- und Servicegesellschaft
Germany
$1.12M 6,640 +235 +4%
VPIM
170
Vanguard Personalized Indexing Management
California
$1.08M 6,441 +726 +13%
PNC Financial Services Group
171
PNC Financial Services Group
Pennsylvania
$1.08M 6,398 +714 +13%
Deutsche Bank
172
Deutsche Bank
Germany
$1.06M 6,312 +3 +0%
GC
173
Guggenheim Capital
Illinois
$954K 5,673 -683 -11%
Calamos Advisors
174
Calamos Advisors
Illinois
$945K 5,617 -17,832 -76%
WG
175
Winton Group
United Kingdom
$945K 5,617 +5,617 New
5 6
7
8 9