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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 %
MCC
226
Malaga Cove Capital
California
$484K -$13K -78 -3%
KPWS
227
Kestra Private Wealth Services
Texas
$482K +$482K +2,892 New
EF
228
Empowered Funds
Pennsylvania
$477K -$171K -1,027 -26%
USAA
229
United Services Automobile Association
Texas
$476K +$476K +2,912 New
VA
230
Vident Advisory
Georgia
$466K +$466K +2,798 New
1WA
231
180 Wealth Advisors
Washington
$459K +$666 +4 +0.1%
BC
232
Bridgefront Capital
Texas
$445K +$445K +2,670 New
BCM
233
Buckhead Capital Management
Georgia
$441K – – –
WAS
234
Wesleyan Assurance Society
United Kingdom
$424K – – –
KIA
235
KCM Investment Advisors
California
$419K +$16.7K +100 +4%
Mariner
236
Mariner
Kansas
$400K -$175K -1,054 -30%
Wealth Enhancement Advisory Services
237
Wealth Enhancement Advisory Services
Minnesota
$400K +$6.83K +41 +2%
Simplex Trading
238
Simplex Trading
Illinois
$389K +$252K +1,513 +183%
URS
239
Utah Retirement Systems
Utah
$383K – – –
CCM
240
Coldstream Capital Management
Washington
$379K -$3K -18 -0.8%
NAAA
241
New Age Alpha Advisors
New York
$378K -$283K -1,701 -43%
MML Investors Services
242
MML Investors Services
Massachusetts
$366K +$38K +228 +12%
M&T Bank
243
M&T Bank
New York
$364K -$79.3K -476 -18%
CB
244
Cadence Bank
Mississippi
$362K – – –
HR
245
Hardy Reed
Mississippi
$362K – – –
BA
246
Bridgewater Associates
Connecticut
$353K -$1.54M -9,273 -81%
AI
247
Atria Investments
North Carolina
$353K +$15.2K +91 +4%
KBC Group
248
KBC Group
Belgium
$351K -$2.84M -17,017 -89%
NEI
249
Northwest & Ethical Investments
Ontario, Canada
$349K +$233K +1,400 +200%
Jane Street
250
Jane Street
New York
$342K -$4.74M -28,437 -93%
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