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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 %
GC
176
Guggenheim Capital
Illinois
$1.06M -$111K -665 -9%
Deutsche Bank
177
Deutsche Bank
Germany
$1.05M +$15.3K +92 +1%
Bank of Montreal
178
Bank of Montreal
Ontario, Canada
$1.02M +$2.83K +17 +0.3%
PCH
179
Polar Capital Holdings
United Kingdom
$1M – – –
BCM
180
Bayesian Capital Management
New York
$1,000K +$1,000K +6,000 New
VPIM
181
Vanguard Personalized Indexing Management
California
$952K +$3.83K +23 +0.4%
PNC Financial Services Group
182
PNC Financial Services Group
Pennsylvania
$947K +$166K +999 +21%
PCM
183
Prelude Capital Management
New York
$943K +$943K +5,659 New
Pathstone Holdings
184
Pathstone Holdings
New Jersey
$915K -$4.17K -25 -0.5%
Susquehanna International Group
185
Susquehanna International Group
Pennsylvania
$904K +$904K +5,426 New
EC
186
EntryPoint Capital
New York
$894K +$894K +5,368 New
BOSSRA
187
B.O.S.S. Retirement Advisors
Utah
$888K – – –
LCM
188
Legato Capital Management
California
$874K +$874K +5,245 New
SOADOR
189
State of Alaska Department of Revenue
Alaska
$866K +$22.5K +135 +3%
EAM
190
Eukles Asset Management
Ohio
$852K -$92.3K -554 -10%
LPL Financial
191
LPL Financial
California
$842K +$124K +746 +17%
CB
192
Commerce Bank
Missouri
$837K +$20.7K +124 +3%
LCM
193
Landscape Capital Management
New Jersey
$833K -$98K -588 -11%
CG
194
Caprock Group
Idaho
$819K +$819K +4,913 New
PHK
195
Point72 Hong Kong
Hong Kong
$808K +$808K +4,852 New
Public Employees Retirement Association of Colorado
196
Public Employees Retirement Association of Colorado
Colorado
$807K – – –
BCI
197
Brinker Capital Investments
Pennsylvania
$794K -$1.83K -11 -0.2%
OPS
198
Orion Portfolio Solutions
Nebraska
$794K -$1.83K -11 -0.2%
HighTower Advisors
199
HighTower Advisors
Illinois
$758K -$377K -2,263 -33%
NIM
200
NEOS Investment Management
Connecticut
$757K -$839K -5,037 -53%
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