Renaissance Technologies — BIIB Trade History
Quarter-by-quarter changes in the BIOGEN INC position · CUSIP 09062X103
Currently held · 6.8 YearsFirst seen: 2019 Q4
| Quarter | Filed | Activity | Shares | Δ Shares | Δ % | Value | % Port. |
|---|---|---|---|---|---|---|---|
| 2026 Q2 | 2026-08-13 | Reduce | 77,744 | -125,652 | -61.8% | $16.8M | 0.02% |
| 2026 Q1 | 2026-05-14 | Reduce | 203,396 | -195,800 | -49.0% | $37.3M | 0.06% |
| 2025 Q4 | 2026-02-12 | Reduce | 399,196 | -565,210 | -58.6% | $70.3M | 0.11% |
| 2025 Q3 | 2025-11-13 | Reduce | 964,406 | -80,700 | -7.7% | $135.1M | 0.18% |
| 2025 Q2 | 2025-08-13 | Add | 1,045,106 | 240,600 | +29.9% | $131.3M | 0.17% |
| 2025 Q1 | 2025-05-14 | Reduce | 804,506 | -387,700 | -32.5% | $110.1M | 0.17% |
| 2024 Q4 | 2025-02-13 | Add | 1,192,206 | 239,500 | +25.1% | $182.3M | 0.27% |
| 2024 Q3 | 2024-11-13 | Add | 952,706 | 334,600 | +54.1% | $184.7M | 0.28% |
| 2024 Q2 | 2024-08-09 | Reduce | 618,106 | -266,598 | -30.1% | $143.3M | 0.24% |
| 2024 Q1 | 2024-05-13 | Add | 884,704 | 126,098 | +16.6% | $190.8K | 0.30% |
| 2023 Q4 | 2024-02-13 | Reduce | 758,606 | -327,791 | -30.2% | $196.3K | 0.30% |
| 2023 Q3 | 2023-11-14 | Reduce | 1,086,397 | -23,140 | -2.1% | $279.2K | 0.48% |
| 2023 Q2 | 2023-08-11 | Reduce | 1,109,537 | -154,300 | -12.2% | $316.1K | 0.46% |
| 2023 Q1 | 2023-05-12 | Add | 1,263,837 | 263,561 | +26.3% | $351.4K | 0.47% |
| 2022 Q4 | 2023-02-13 | Reduce | 1,000,276 | -154,231 | -13.4% | $277.0K | 0.38% |
| 2022 Q3 | 2022-11-14 | Reduce | 1,154,507 | -391,500 | -25.3% | $308.3M | 0.44% |
| 2022 Q2 | 2022-08-12 | Add | 1,546,007 | 501,800 | +48.1% | $315.3M | 0.37% |
| 2022 Q1 | 2022-05-13 | Reduce | 1,044,207 | -29,600 | -2.8% | $219.9M | 0.26% |
| 2021 Q4 | 2022-02-11 | Add | 1,073,807 | 92,100 | +9.4% | $257.6M | 0.32% |
| 2021 Q3 | 2021-11-12 | Reduce | 981,707 | -348,296 | -26.2% | $277.8M | 0.36% |
| 2021 Q2 | 2021-08-13 | Reduce | 1,330,003 | -608,159 | -31.4% | $460.5M | 0.57% |
| 2021 Q1 | 2021-05-13 | Reduce | 1,938,162 | -1,099,600 | -36.2% | $542.2M | 0.68% |
| 2020 Q4 | 2021-02-10 | Reduce | 3,037,762 | -779,199 | -20.4% | $743.8M | 0.81% |
| 2020 Q3 | 2020-11-13 | Reduce | 3,816,961 | -88,961 | -2.3% | $1.08B | 1.08% |
| 2020 Q2 | 2020-08-13 | Reduce | 3,905,922 | -567,990 | -12.7% | $1.05B | 0.90% |
| 2020 Q1 | 2020-05-14 | Reduce | 4,473,912 | -95,994 | -2.1% | $1.42B | 1.38% |
| 2019 Q4 | 2020-02-13 | New | 4,569,906 | 4,569,906 | — | $1.36B | 1.04% |
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.