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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 %
MWM
251
Mission Wealth Management
California
$270K +$168 +1 +0.1%
SCM
252
Shelton Capital Management
Colorado
$268K -$8.75K -52 -3%
MML Investors Services
253
MML Investors Services
Massachusetts
$264K -$105K -626 -29%
AssetMark Inc
254
AssetMark Inc
California
$259K +$12.3K +73 +5%
QCM
255
Qsemble Capital Management
New York
$257K +$257K +1,525 New
TRCT
256
Tower Research Capital (TRC)
New York
$255K +$27.9K +166 +12%
CI
257
Corient IA
Florida
$252K – – –
Mercer Global Advisors
258
Mercer Global Advisors
Colorado
$248K +$248K +1,472 New
FTWA
259
Fifth Third Wealth Advisors
Ohio
$246K +$841 +5 +0.3%
AW
260
Apricus Wealth
South Carolina
$246K – – –
ACM
261
Andina Capital Management
Utah
$239K +$239K +1,420 New
KCP
262
Kera Capital Partners
California
$232K +$232K +1,380 New
KP
263
Keel Point
Alabama
$225K -$4.88K -29 -2%
P
264
Pitcairn
Pennsylvania
$222K -$51.3K -305 -19%
ZIM
265
Zacks Investment Management
Illinois
$217K -$4.46M -26,517 -95%
Vontobel Holding
266
Vontobel Holding
Switzerland
$216K -$18.7K -111 -8%
FFM
267
Forum Financial Management
Illinois
$213K -$8.41K -50 -4%
KBC Group
268
KBC Group
Belgium
$212K -$143K -847 -40%
BP
269
Ballentine Partners
Massachusetts
$211K +$3.2K +19 +2%
CIS
270
Custom Index Systems
New York
$210K +$2.69K +16 +1%
GT
271
Greenleaf Trust
Michigan
$205K -$16.3K -97 -7%
KIA
272
Knollwood Investment Advisory
Maryland
$202K +$202K +1,200 New
HWM
273
HB Wealth Management
Georgia
$201K -$13K -77 -6%
WT
274
Whittier Trust
California
$191K -$3.87K -23 -2%
UCB
275
United Community Bank
South Carolina
$159K +$841 +5 +0.5%
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