D.E. Shaw & Co — BIIB Trade History
Quarter-by-quarter changes in the BIOGEN INC position · CUSIP 09062X103
Currently held · 1 QFirst seen: 2016 Q3
| Quarter | Filed | Activity | Shares | Δ Shares | Δ % | Value | % Port. |
|---|---|---|---|---|---|---|---|
| 2026 Q2 | 2026-08-14 | New | 74,438 | 74,438 | — | $16.1M | 0.01% |
| 2026 Q1 | 2026-05-15 | Sold out | — | -53,754 | -100.0% | — | — |
| 2025 Q4 | 2026-02-17 | Reduce | 53,754 | -424,170 | -88.8% | $9.5M | 0.01% |
| 2025 Q3 | 2025-11-14 | Reduce | 477,924 | -888,283 | -65.0% | $66.9M | 0.04% |
| 2025 Q2 | 2025-08-14 | Reduce | 1,366,207 | -219,365 | -13.8% | $171.6M | 0.12% |
| 2025 Q1 | 2025-05-15 | Reduce | 1,585,572 | -24,327 | -1.5% | $217.0M | 0.19% |
| 2024 Q4 | 2025-02-14 | Add | 1,609,899 | 1,174,960 | +270.1% | $246.2M | 0.18% |
| 2024 Q3 | 2024-11-14 | New | 434,939 | 434,939 | — | $84.3M | 0.07% |
| 2024 Q1 | 2024-11-14 | — | — | — | — | — | — |
| 2023 Q4 | 2024-11-14 | Sold out | — | -214,691 | -100.0% | — | — |
| 2024 Q2 | 2024-08-14 | Reduce | 214,691 | -64,147 | -23.0% | $49.8M | 0.05% |
| 2023 Q3 | 2023-11-14 | Reduce | 278,838 | -567,606 | -67.1% | $71.7M | 0.07% |
| 2023 Q2 | 2023-08-14 | Reduce | 846,444 | -487,546 | -36.5% | $241.1M | 0.25% |
| 2023 Q1 | 2023-05-15 | Reduce | 1,333,990 | -422,092 | -24.0% | $370.9M | 0.40% |
| 2022 Q4 | 2023-02-14 | Add | 1,756,082 | 220,767 | +14.4% | $486.3M | 0.54% |
| 2022 Q3 | 2022-11-14 | Add | 1,535,315 | 179,461 | +13.2% | $409.9M | 0.49% |
| 2022 Q2 | 2022-08-15 | Add | 1,355,854 | 361,974 | +36.4% | $276.5M | 0.32% |
| 2022 Q1 | 2022-05-16 | Add | 993,880 | 396,919 | +66.5% | $209.3M | 0.20% |
| 2021 Q4 | 2022-02-14 | Add | 596,961 | 220,470 | +58.6% | $143.2M | 0.12% |
| 2021 Q3 | 2021-11-15 | Reduce | 376,491 | -413,202 | -52.3% | $106.5M | 0.10% |
| 2021 Q2 | 2021-08-16 | Add | 789,693 | 180,453 | +29.6% | $273.4M | 0.24% |
| 2021 Q1 | 2021-05-17 | Reduce | 609,240 | -78,553 | -11.4% | $170.4M | 0.17% |
| 2020 Q4 | 2021-02-16 | Add | 687,793 | 319,901 | +87.0% | $168.4M | 0.15% |
| 2020 Q3 | 2020-11-16 | Reduce | 367,892 | -475,814 | -56.4% | $104.4M | 0.11% |
| 2020 Q2 | 2020-08-14 | Add | 843,706 | 427,363 | +102.6% | $225.7M | 0.27% |
| 2020 Q1 | 2020-05-15 | Reduce | 416,343 | -1,167,480 | -73.7% | $131.7M | 0.21% |
| 2019 Q4 | 2020-02-14 | Reduce | 1,583,823 | -1,085,030 | -40.7% | $470.0M | 0.54% |
| 2019 Q3 | 2019-11-14 | Add | 2,668,853 | 95,877 | +3.7% | $621.4M | 0.77% |
| 2019 Q2 | 2019-08-14 | Add | 2,572,976 | 1,524,355 | +145.4% | $601.7M | 0.75% |
| 2019 Q1 | 2019-05-15 | Add | 1,048,621 | 651,468 | +164.0% | $247.9M | 0.32% |
| 2018 Q4 | 2019-02-14 | Reduce | 397,153 | -46,678 | -10.5% | $119.5M | 0.17% |
| 2018 Q3 | 2018-11-14 | Add | 443,831 | 108,002 | +32.2% | $156.8M | 0.19% |
| 2018 Q2 | 2018-08-14 | Reduce | 335,829 | -619,096 | -64.8% | $97.5M | 0.13% |
| 2018 Q1 | 2018-05-15 | Add | 954,925 | 478,787 | +100.6% | $261.5M | 0.36% |
| 2017 Q4 | 2018-02-14 | Reduce | 476,138 | -133,795 | -21.9% | $151.7M | 0.21% |
| 2017 Q3 | 2017-11-14 | Reduce | 609,933 | -695,925 | -53.3% | $191.0M | 0.29% |
| 2017 Q2 | 2017-08-14 | Reduce | 1,305,858 | -253,197 | -16.2% | $354.4M | 0.59% |
| 2017 Q1 | 2017-05-15 | Reduce | 1,559,055 | -252,028 | -13.9% | $426.3M | 0.75% |
| 2016 Q4 | 2017-02-14 | Add | 1,811,083 | 199,699 | +12.4% | $513.6M | 0.87% |
| 2016 Q3 | 2016-11-14 | New | 1,611,384 | 1,611,384 | — | $504.4M | 0.89% |
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.