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.
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)
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
1,688 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.