Rock Springs Capital Management LP / BSX
Rock Springs Capital Management LP’s Boston Scientific Corp Position
Does Rock Springs Capital Management LP own Boston Scientific Corp (BSX)? Yes — 515.3K shares worth $32M (+1.91% of its 13F portfolio) as of Q1 2026, up from 399.1K shares the prior filed quarter.
Position Value
$32M
Q1 2026
Shares
515.3K
% of Portfolio
+1.91%
Quarters Held
23
currently held
Position History BSX
Reported value by quarter
| Quarter | Shares | Value | % of Portfolio |
|---|---|---|---|
| Q1 2026 | 515.3K | $32M | +1.91% |
| Q4 2025 | 399.1K | $38M | +1.95% |
| Q3 2025 | 360.3K | $35M | +2.05% |
| Q2 2025 | 355.0K | $38M | +2.38% |
| Q1 2025 | 277.0K | $28M | +1.60% |
| Q4 2024 | 460.0K | $41M | +1.56% |
| Q3 2024 | 460.0K | $39M | +1.25% |
| Q2 2024 | 817.5K | $63M | +1.89% |
| Q1 2024 | 1.23M | $84M | +2.14% |
| Q4 2023 | 1.23M | $71M | +1.75% |
| Q3 2023 | 1.16M | $61M | +1.64% |
| Q2 2023 | 267.5K | $14M | +0.34% |
| Q2 2021 | 800.0K | $34M | +0.68% |
| Q1 2021 | 800.0K | $31M | +0.67% |
| Q4 2020 | 800.0K | $29M | +0.61% |
| Q3 2020 | 1.10M | $42M | +1.07% |
| Q2 2020 | 1.10M | $39M | +1.06% |
| Q1 2020 | 1.10M | $36M | +1.48% |
| Q4 2019 | 1.20M | $54M | +1.71% |
| Q3 2019 | 970.0K | $39M | +1.57% |
| Q2 2019 | 970.0K | $42M | +1.51% |
| Q1 2019 | 970.0K | $37M | +1.44% |
| Q4 2018 | 915.0K | $32M | +1.53% |
Common-stock position only; options are excluded. Quarters where the fund filed no 13F or reported no position are absent. See Rock Springs Capital Management LP’s full portfolio or all institutional holders of BSX.