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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 %
GKIM
301
GW&K Investment Management
Massachusetts
$23K 135 – –
Bessemer Group
302
Bessemer Group
New Jersey
$21K 127 +6 +5%
Optiver Holding
303
Optiver Holding
Netherlands
$20.9K 124 +6 +5%
Nomura Asset Management
304
Nomura Asset Management
Japan
$20.2K 120 – –
TWD
305
True Wealth Design
Ohio
$19.5K 116 +27 +30%
HFM
306
Harvest Fund Management
China
$19K 115 -3,814 -97%
NA
307
NewEdge Advisors
Louisiana
$18.8K 112 – –
FDW
308
Fourth Dimension Wealth
Ohio
$16.8K 100 – –
Simplex Trading
309
Simplex Trading
Illinois
$16K 98 -2,240 -96%
PFBT
310
Parkside Financial Bank & Trust
Missouri
$15.6K 93 – –
RA
311
Rise Advisors
New York
$15.6K 93 – –
HNB
312
Huntington National Bank
Ohio
$14.6K 87 -219 -72%
C
313
Covestor
United Kingdom
$14K 81 -1 -1%
CTC
314
Central Trust Company
Missouri
$13.3K 79 – –
BCM
315
Boreal Capital Management
Florida
$12.6K 75 +75 New
ST
316
Smithfield Trust
Pennsylvania
$11K 65 – –
HFS
317
Hantz Financial Services
Michigan
$11K 65 +59 +983%
HIW
318
Holos Integrated Wealth
Pennsylvania
$9.84K 68 – –
IRC
319
Investors Research Corp
Georgia
$8.41K 50 – –
GM
320
GeoWealth Management
Illinois
$8.41K 50 +50 New
CYG
321
Clean Yield Group
Vermont
$8.24K 49 – –
SWM
322
Spire Wealth Management
Virginia
$7.4K 44 – –
SL
323
Salomon & Ludwin
Virginia
$6.85K 40 +40 New
GWM
324
Geneos Wealth Management
Colorado
$6.73K 40 -58 -59%
FHA
325
First Horizon Advisors
Tennessee
$6.56K 39 – –
11 12
13
14 15