Citadel Advisors (Ken Griffin) — BSX Trade History
Quarter-by-quarter changes in the BOSTON SCIENTIFIC CORP position · CUSIP 101137107
Currently held · 4.5 YearsFirst seen: 2015 Q4
| Quarter | Filed | Activity | Shares | Δ Shares | Δ % | Value | % Port. |
|---|---|---|---|---|---|---|---|
| 2026 Q2 | 2026-09-02 | Add | 4,987,748 | 770,434 | +18.3% | $212.9M | 0.02% |
| 2026 Q1 | 2026-05-15 | Reduce | 4,217,314 | -558,304 | -11.7% | $264.6M | 0.04% |
| 2025 Q4 | 2026-02-17 | Reduce | 4,775,618 | -4,130,627 | -46.4% | $455.4M | 0.07% |
| 2025 Q3 | 2025-11-14 | Add | 8,906,245 | 3,501,940 | +64.8% | $869.5M | 0.13% |
| 2025 Q2 | 2025-08-14 | Reduce | 5,404,305 | -29,250 | -0.5% | $580.5M | 0.10% |
| 2025 Q1 | 2025-05-15 | Add | 5,433,555 | 502,103 | +10.2% | $548.1M | 0.10% |
| 2024 Q4 | 2025-02-14 | Reduce | 4,931,452 | -4,861,651 | -49.6% | $440.5M | 0.08% |
| 2024 Q3 | 2024-11-14 | Reduce | 9,793,103 | -2,706,764 | -21.7% | $820.7M | 0.16% |
| 2024 Q2 | 2024-08-14 | Add | 12,499,867 | 3,725,802 | +42.5% | $962.6M | 0.20% |
| 2024 Q1 | 2024-05-15 | Reduce | 8,774,065 | -207,469 | -2.3% | $600.9M | 0.12% |
| 2023 Q4 | 2024-02-14 | Reduce | 8,981,534 | -12,174,688 | -57.5% | $519.2M | 0.10% |
| 2023 Q3 | 2023-11-14 | Add | 21,156,222 | 5,699,874 | +36.9% | $1.12B | 0.24% |
| 2023 Q2 | 2023-08-14 | Add | 15,456,348 | 444,201 | +3.0% | $836.0M | 0.17% |
| 2023 Q1 | 2023-05-15 | Add | 15,012,147 | 8,477,836 | +129.7% | $751.1M | 0.17% |
| 2022 Q4 | 2023-02-14 | Reduce | 6,534,311 | -7,957,191 | -54.9% | $302.3M | 0.07% |
| 2022 Q3 | 2022-11-14 | Add | 14,491,502 | 1,960,393 | +15.6% | $561.3M | 0.13% |
| 2022 Q2 | 2022-08-15 | Reduce | 12,531,109 | -412,621 | -3.2% | $467.0M | 0.12% |
| 2022 Q1 | 2022-05-16 | New | 12,943,730 | 12,943,730 | — | $573.3M | 0.12% |
| 2021 Q3 | 2022-03-11 | Sold out | — | -6,519,148 | -100.0% | — | — |
| 2021 Q4 | 2022-02-14 | Add | 6,519,148 | 1,038,271 | +18.9% | $276.9M | 0.06% |
| 2021 Q2 | 2021-08-16 | Add | 5,480,877 | 4,646,664 | +557.0% | $234.4M | 0.05% |
| 2021 Q1 | 2021-05-21 | Reduce | 834,213 | -4,295,293 | -83.7% | $32.2M | 0.01% |
| 2020 Q4 | 2021-02-16 | Add | 5,129,506 | 4,723,216 | +1162.5% | $184.4M | 0.05% |
| 2020 Q3 | 2020-11-16 | Add | 406,290 | 321,066 | +376.7% | $15.5M | 0.00% |
| 2020 Q2 | 2020-08-14 | Reduce | 85,224 | -8,558,697 | -99.0% | $3.0M | 0.00% |
| 2020 Q1 | 2020-05-15 | Add | 8,643,921 | 2,799,798 | +47.9% | $282.1M | 0.13% |
| 2019 Q4 | 2020-02-14 | New | 5,844,123 | 5,844,123 | — | $264.3M | 0.12% |
| 2019 Q2 | 2020-02-14 | — | — | — | — | — | — |
| 2018 Q4 | 2019-11-14 | Sold out | — | -5,649,962 | -100.0% | — | — |
| 2019 Q3 | 2019-11-14 | New | 5,649,962 | 5,649,962 | — | $229.9M | 0.11% |
| 2018 Q2 | 2019-08-14 | — | — | — | — | — | — |
| 2018 Q3 | 2019-05-15 | Sold out | — | -861,657 | -100.0% | — | — |
| 2019 Q1 | 2019-05-15 | New | 861,657 | 861,657 | — | $33.1M | 0.02% |
| 2018 Q1 | 2019-02-14 | Sold out | — | -609,765 | -100.0% | — | — |
| 2017 Q4 | 2018-02-09 | Reduce | 609,765 | -1,467,135 | -70.6% | $15.1M | 0.01% |
| 2017 Q3 | 2017-11-09 | Add | 2,076,900 | 528,094 | +34.1% | $60.6M | 0.05% |
| 2017 Q2 | 2017-08-11 | Add | 1,548,806 | 311,867 | +25.2% | $42.9M | 0.04% |
| 2017 Q1 | 2017-05-12 | Reduce | 1,236,939 | -6,740,748 | -84.5% | $30.8M | 0.03% |
| 2016 Q4 | 2017-02-10 | Add | 7,977,687 | 4,432,614 | +125.0% | $172.6M | 0.17% |
| 2015 Q4 | 2017-01-31 | New | 3,545,073 | 3,545,073 | — | $65.4M | 0.07% |
Share counts are split-adjusted. Time held counts consecutive quarters ending with the latest filing; more than ten years shows as ">10 Years".
13F data shows quarter-end positions, is delayed by up to 45 days and covers only long positions in US-listed securities; short positions, most derivatives and non-US assets are not reported.