Boston Scientific
1,697 hedge funds and large institutions have $145B invested in Boston Scientific in 2025 Q2 according to their latest regulatory filings, with 153 funds opening new positions, 756 increasing their positions, 556 reducing their positions, and 91 closing their positions.
68% more first-time investments, than exits
New positions opened: 153 | Existing positions closed: 91
36% more repeat investments, than reductions
Existing positions increased: 756 | Existing positions reduced: 556
26% more call options, than puts
Call options by funds: $1.08B | Put options by funds: $859M
18% more capital inflows, than outflows
Capital inflows: $8.81B | Capital outflows: $7.43B
3% more funds holding
Funds holding: 1,654 → 1,697 (+43)
0.74% more ownership
Funds ownership: 90.82% → 91.56% (+0.74%)
18% less funds holding in top 10
Funds holding in top 10: 51 → 42 (-9)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Edgewood Management
Greenwich,
Connecticut
|
+$703M |
| 2 |
BlackRock
New York
|
+$508M |
| 3 |
VOYA Investment Management
Atlanta,
Georgia
|
+$485M |
| 4 |
D.E. Shaw & Co
New York
|
+$295M |
| 5 |
Bessemer Group
Woodbridge,
New Jersey
|
+$293M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Fidelity Investments
Boston,
Massachusetts
|
-$2.05B |
| 2 |
JP Morgan Chase
New York
|
-$593M |
| 3 |
Millennium Management
New York
|
-$375M |
| 4 |
Massachusetts Financial Services
Boston,
Massachusetts
|
-$371M |
| 5 |
Winslow Capital Management
Minneapolis,
Minnesota
|
-$268M |
BSX Hedge Fund Activity: Q2 2025 in Review
1,697 of the 7,629 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: 153 funds opened new BSX positions and 91 closed out — a net gain of 62 holders — while 756 added to existing stakes and 556 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.
- 1,697 institutional investors held Boston Scientific (BSX) as of Q2 2025, up from 1,654 in Q1 2025.
- Funds reported $145B of Boston Scientific stock for Q2 2025, up 7.4% quarter-over-quarter.
- 153 funds opened new Boston Scientific positions in Q2 2025 and 91 closed out, a net change of +62 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.