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Boston Scientific
BSX

Overview Fund Activity

1,653 hedge funds and large institutions have $143B invested in Boston Scientific in 2025 Q2 according to their latest regulatory filings, with 151 funds opening new positions, 739 increasing their positions, 537 reducing their positions, and 86 closing their positions.

Holders
1,653
Holders Change
+33
Holders Change %
+2.04%
% of All Funds
22.2%
Holding in Top 10
39
Holding in Top 10 Change
-11
Holding in Top 10 Change %
-22%
% of All Funds
0.52%
New
151
Increased
739
Reduced
537
Closed
86
Calls
$863M
Puts
$692M
Net Calls
+$171M
Net Calls Change
-$85.1M

Top Buyers

1
Norges Bank
1
Norges Bank
Norway
$2.09B
2
Edgewood Management
2
Edgewood Management
Connecticut
$747M
3
BlackRock
3
BlackRock
New York
$15.8B
4
VOYA Investment Management
4
VOYA Investment Management
Georgia
$939M
5
D.E. Shaw & Co
5
D.E. Shaw & Co
New York
$726M

Top Sellers

1
Fidelity Investments
1
Fidelity Investments
Massachusetts
$11.6B
2
JPMorgan Chase & Co
2
JPMorgan Chase & Co
New York
$2.76B
3
Massachusetts Financial Services
3
Massachusetts Financial Services
Massachusetts
$1.38B
4
Millennium Management
4
Millennium Management
New York
$444M
5
Winslow Capital Management
5
Winslow Capital Management
Minnesota
$1.14M
Name Market Value Shares Shares
Change 		Shares
Change %
Bank of Montreal
101
Bank of Montreal
Ontario, Canada
$217M 2,020,494 -113,247 -5%
Voloridge Investment Management
102
Voloridge Investment Management
Florida
$217M 2,018,678 +2,018,678 New
UE
103
Unisphere Establishment
Liechtenstein
$211M 1,966,400 -200,000 -9%
Macquarie Group
104
Macquarie Group
Australia
$209M 1,945,205 -61,537 -3%
Canada Life
105
Canada Life
Manitoba, Canada
$207M 1,924,409 +101,925 +6%
GLA
106
Great Lakes Advisors
Illinois
$200M 1,859,865 -208,338 -10%
Principal Financial Group
107
Principal Financial Group
Iowa
$199M 1,852,793 -34,044 -2%
Allianz Asset Management
108
Allianz Asset Management
Germany
$198M 1,841,216 +451,135 +32%
AQR Capital Management
109
AQR Capital Management
Connecticut
$197M 1,843,193 +687,364 +59%
DekaBank Deutsche Girozentrale
110
DekaBank Deutsche Girozentrale
Germany
$195M 1,844,793 +147,932 +9%
Zurich Cantonal Bank
111
Zurich Cantonal Bank
Switzerland
$195M 1,815,344 +495,346 +38%
Federated Hermes
112
Federated Hermes
Pennsylvania
$195M 1,813,505 +18,665 +1%
BG
113
Bellevue Group
Switzerland
$190M 1,765,194 -185,826 -10%
Allspring Global Investments
114
Allspring Global Investments
North Carolina
$189M 1,805,476 -49,764 -3%
CAM
115
Congress Asset Management
Massachusetts
$183M 1,701,570 -17,258 -1%
ECU
116
Egerton Capital (UK)
United Kingdom
$176M 1,640,956 +1,640,956 New
LPL Financial
117
LPL Financial
California
$172M 1,604,441 +480,430 +43%
Mackenzie Financial
118
Mackenzie Financial
Ontario, Canada
$172M 1,603,611 +832,272 +108%
Balyasny Asset Management
119
Balyasny Asset Management
Illinois
$162M 1,504,913 -333,266 -18%
Renaissance Technologies
120
Renaissance Technologies
New York
$161M 1,496,541 +844,988 +130%
CI Investments Inc
121
CI Investments Inc
Ontario, Canada
$160M 1,486,699 +108,475 +8%
State Board of Administration of Florida Retirement System
122
State Board of Administration of Florida Retirement System
Florida
$157M 1,463,096 +2,729 +0.2%
Korea Investment Corp
123
Korea Investment Corp
South Korea
$157M 1,462,711 -139,401 -9%
Russell Investments Group
124
Russell Investments Group
United Kingdom
$155M 1,442,640 +120,648 +9%
Impax Asset Management Group
125
Impax Asset Management Group
United Kingdom
$154M 1,449,736 -15,034 -1%
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5
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