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Boston Scientific
BSX

1,688 hedge funds and large institutions have $145B invested in Boston Scientific in 2025 Q2 according to their latest regulatory filings, with 154 funds opening new positions, 751 increasing their positions, 552 reducing their positions, and 91 closing their positions.

New
Increased
Maintained
Reduced
Closed

69% more first-time investments, than exits

New positions opened: 154 | Existing positions closed: 91

36% more repeat investments, than reductions

Existing positions increased: 751 | Existing positions reduced: 552

26% more call options, than puts

Call options by funds: $1.08B | Put options by funds: $859M

7% more capital invested

Capital invested by funds: $135B → $145B (+$10B)

3% more funds holding

Funds holding: 1,643 → 1,688 (+45)

0.75% more ownership

Funds ownership: 90.79% → 91.53% (+0.75%)

18% less funds holding in top 10

Funds holding in top 10: 51 → 42 (-9)

Holders
1,688
Holders Change
+45
Holders Change %
+2.74%
% of All Funds
22.22%
Holding in Top 10
42
Holding in Top 10 Change
-9
Holding in Top 10 Change %
-17.65%
% of All Funds
0.55%
New
154
Increased
751
Reduced
552
Closed
91
Calls
$1.08B
Puts
$859M
Net Calls
+$225M
Net Calls Change
-$30.7M

Top Buyers

Rank Fund Capital Flow
1
Edgewood Management
Edgewood Management
Connecticut
+$703M
2
BlackRock
BlackRock
New York
+$508M
3
VOYA Investment Management
VOYA Investment Management
Georgia
+$485M
4
D.E. Shaw & Co
D.E. Shaw & Co
New York
+$295M
5
Bessemer Group
Bessemer Group
New Jersey
+$293M

Top Sellers

Rank Fund Capital Flow
1
Fidelity Investments
Fidelity Investments
Massachusetts
-$2.05B
2
JP Morgan Chase
JP Morgan Chase
New York
-$593M
3
Millennium Management
Millennium Management
New York
-$375M
4
Massachusetts Financial Services
Massachusetts Financial Services
Massachusetts
-$371M
5
Winslow Capital Management
Winslow Capital Management
Minnesota
-$268M
Name Holding Trade Value Shares
Change 		Change in
Stake
GFM
626
GF Fund Management
China
$3.33M -$23.5K -232 -0.7%
CPBTD
627
Central Pacific Bank - Trust Division
Hawaii
$3.3M +$26.2K +259 +0.8%
LNWWM
628
Laird Norton Wetherby Wealth Management
California
$3.28M +$3.09M +30,507 New
CK
629
Cohen Klingenstein
New York
$3.28M – – –
GT
630
Glenview Trust
Kentucky
$3.26M +$2.83K +28 +0.1%
CC
631
Courier Capital
New York
$3.26M -$16.1K -159 -0.5%
VT
632
Vise Technologies
New York
$3.25M +$3.06M +30,218 New
AAMU
633
APG Asset Management US
New York
$3.19M – – –
CCM
634
Conway Capital Management
California
$3.18M -$175K -1,725 -5%
GI
635
GAMMA Investing
California
$3.17M +$398K +3,932 +15%
TS
636
Triglav Skladi
Slovenia
$3.11M – – –
A
637
Argentarii
Ohio
$3.09M -$220K -2,175 -7%
CFO
638
Callan Family Office
Pennsylvania
$3.05M +$2.15M +21,203 +295%
DAM
639
Deltec Asset Management
New York
$3.04M +$2.21M +21,800 +335%
LAM
640
LECAP Asset Management
United Kingdom
$2.91M +$2.74M +27,070 New
BCM
641
Barometer Capital Management
Ontario, Canada
$2.91M -$1.09M -10,750 -28%
AIC
642
Argus Investors Counsel
New York
$2.89M +$42K +415 +2%
GT
643
Greenleaf Trust
Michigan
$2.88M -$151K -1,488 -5%
CUAMC
644
China Universal Asset Management Company
China
$2.85M +$824K +8,139 +44%
EWM
645
Empirical Wealth Management
Washington
$2.84M +$475K +4,690 +22%
MC
646
Moors & Cabot
Massachusetts
$2.82M -$85.4K -844 -3%
BAAM
647
Baker Avenue Asset Management
California
$2.8M -$143K -1,410 -5%
IA
648
Integrity Alliance
Iowa
$2.79M -$54.8K -542 -2%
ORAM
649
One River Asset Management
Connecticut
$2.78M +$2.62M +25,872 New
FCM
650
Fairbanks Capital Management
California
$2.76M +$163K +1,609 +7%
24 25
26
27 28

BSX Hedge Fund Activity: Q2 2025 in Review

1,688 of the 7,596 institutional investors tracked by Wall St. Rank reported a position in Boston Scientific (BSX) for Q2 2025, worth a combined $145B — up 7.4% from $135B a quarter earlier.

Buyers outnumbered sellers: 154 funds opened new BSX positions and 91 closed out — a net gain of 63 holders — while 751 added to existing stakes and 552 trimmed.

The largest buyer was Edgewood Management, opening a new position worth an estimated $703M. The largest seller was Fidelity Investments, cutting an estimated $2.05B.

  • 1,688 institutional investors held Boston Scientific (BSX) as of Q2 2025, up from 1,643 in Q1 2025.
  • Funds reported $145B of Boston Scientific stock for Q2 2025, up 7.4% quarter-over-quarter.
  • 154 funds opened new Boston Scientific positions in Q2 2025 and 91 closed out, a net change of +63 holders.
  • The largest Boston Scientific buyer in Q2 2025 was Edgewood Management, an estimated $703M added.
  • The largest Boston Scientific seller in Q2 2025 was Fidelity Investments, an estimated $2.05B sold.

Based on aggregated 13F filings for Q2 2025.