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Boston Scientific

1,691 hedge funds and large institutions have $131B invested in Boston Scientific in 2025 Q3 according to their latest regulatory filings, with 177 funds opening new positions, 762 increasing their positions, 548 reducing their positions, and 133 closing their positions.

New
Increased
Maintained
Reduced
Closed

more repeat investments, than reductions

Existing positions increased: | Existing positions reduced:

more first-time investments, than exits

New positions opened: | Existing positions closed:

more call options, than puts

Call options by funds: $ | Put options by funds: $

more funds holding

Funds holding:

0.88% less ownership

Funds ownership: 91.29%90.41% (-0.88%)

7% less funds holding in top 10

Funds holding in top 10: 4239 (-3)

10% less capital invested

Capital invested by funds: $145B → $131B (-$14.2B)

Holders
1,691
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
39
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$1.13B
Puts
$989M
Net Calls
Net Calls Change

Top Buyers

1 +$671M
2 +$547M
3 +$358M
4
Millennium Management
Millennium Management
New York
+$357M
5
Citadel Advisors
Citadel Advisors
Florida
+$342M
Name Holding Trade Value Shares
Change
Change in
Stake
SCI
351
S&CO Inc
Massachusetts
$16.9M
TRSOTSOK
352
Teachers Retirement System of the State of Kentucky
Kentucky
$16.7M
OPERF
353
Oregon Public Employees Retirement Fund
Oregon
$16.5M
SC
354
SouthState Corp
Florida
$16.5M
KAS
355
Kestra Advisory Services
Texas
$16.4M
EMPI
356
Elo Mutual Pension Insurance
Finland
$16.4M
Rafferty Asset Management
357
Rafferty Asset Management
New York
$16.1M
APM
358
Avidity Partners Management
Texas
$16M
QCM
359
QRG Capital Management
Illinois
$16M
IMRF
360
Illinois Municipal Retirement Fund
Illinois
$16M
MCM
361
MAI Capital Management
Ohio
$15.9M
AIM
362
Avity Investment Management
Connecticut
$15.9M
NRI
363
NFP Retirement Inc
California
$15.8M
AF
364
Avanza Fonder
Sweden
$15.8M
MOACM
365
Mutual of America Capital Management
New York
$15.7M
BA
366
Bridgewater Associates
Connecticut
$15.6M
SLAM
367
Swiss Life Asset Management
$15.6M
SOADOR
368
State of Alaska Department of Revenue
Alaska
$15.5M
BPCE
369
Bank Pictet & Cie (Europe)
Germany
$15.4M
CTI
370
Community Trust & Investment
Kentucky
$15.1M
CWM
371
Calamos Wealth Management
Illinois
$15.1M
JCM
372
Jag Capital Management
Missouri
$15.1M
ZDA
373
Zweig-DiMenna Associates
New York
$15.1M
GC
374
Guggenheim Capital
Illinois
$14.8M
CIBC World Market
375
CIBC World Market
Ontario, Canada
$14.5M