MASI icon

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 %
SAM
301
Smartleaf Asset Management
Massachusetts
$28.6K -$14.8K -88 -34%
AAP
302
Arax Advisory Partners
Colorado
$27.4K +$8.92K +53 +48%
Northwestern Mutual Wealth Management
303
Northwestern Mutual Wealth Management
Wisconsin
$25.6K – – –
GKIM
304
GW&K Investment Management
Massachusetts
$23K – – –
Bessemer Group
305
Bessemer Group
New Jersey
$21K +$992 +6 +5%
Optiver Holding
306
Optiver Holding
Netherlands
$20.9K +$1.01K +6 +5%
Nomura Asset Management
307
Nomura Asset Management
Japan
$20.2K – – –
TWD
308
True Wealth Design
Ohio
$19.5K +$4.54K +27 +30%
HFM
309
Harvest Fund Management
China
$19K -$630K -3,814 -97%
NA
310
NewEdge Advisors
Louisiana
$18.8K – – –
FDW
311
Fourth Dimension Wealth
Ohio
$16.8K – – –
Simplex Trading
312
Simplex Trading
Illinois
$16K -$366K -2,240 -96%
PFBT
313
Parkside Financial Bank & Trust
Missouri
$15.6K – – –
RA
314
Rise Advisors
New York
$15.6K – – –
HNB
315
Huntington National Bank
Ohio
$14.6K -$36.8K -219 -72%
C
316
Covestor
United Kingdom
$14K -$173 -1 -1%
CTC
317
Central Trust Company
Missouri
$13.3K – – –
BCM
318
Boreal Capital Management
Florida
$12.6K +$12.6K +75 New
ST
319
Smithfield Trust
Pennsylvania
$11K – – –
HFS
320
Hantz Financial Services
Michigan
$11K +$9.99K +59 +983%
HIW
321
Holos Integrated Wealth
Pennsylvania
$9.84K – – –
CIBC Private Wealth Group
322
CIBC Private Wealth Group
Georgia
$9.25K -$30.6K -182 -77%
IRC
323
Investors Research Corp
Georgia
$8.41K – – –
GM
324
GeoWealth Management
Illinois
$8.41K +$8.41K +50 New
CYG
325
Clean Yield Group
Vermont
$8.24K – – –
11 12
13
14 15