Acadian Asset Management LLC / BIIB
Acadian Asset Management LLC’s Biogen Inc Position
Does Acadian Asset Management LLC own Biogen Inc (BIIB)? Yes — 248.5K shares worth $46M (+0.06% of its 13F portfolio) as of Q1 2026, up from 187.5K shares the prior filed quarter.
Position Value
$46M
Q1 2026
Shares
248.5K
% of Portfolio
+0.06%
Quarters Held
30
currently held
Position History BIIB
Reported value by quarter
| Quarter | Shares | Value | % of Portfolio |
|---|---|---|---|
| Q1 2026 | 248.5K | $46M | +0.06% |
| Q4 2025 | 187.5K | $33M | +0.05% |
| Q3 2025 | 195.3K | $27M | +0.05% |
| Q2 2025 | 199.5K | $25M | +0.05% |
| Q1 2025 | 17.6K | $2M | +0.01% |
| Q4 2024 | 3.2K | $489,000 | 0.00% |
| Q3 2024 | 2.5K | $476,000 | 0.00% |
| Q2 2024 | 5.7K | $1M | 0.00% |
| Q1 2024 | 1.9K | $407,000 | 0.00% |
| Q4 2023 | 1.9K | $497,000 | 0.00% |
| Q3 2023 | 13.3K | $3M | +0.01% |
| Q2 2023 | 46.0K | $13M | +0.05% |
| Q1 2023 | 45.7K | $13M | +0.06% |
| Q4 2022 | 59.6K | $17M | +0.08% |
| Q3 2022 | 92.0K | $25M | +0.13% |
| Q2 2022 | 75.1K | $15M | +0.08% |
| Q1 2022 | 114.5K | $24M | +0.10% |
| Q4 2021 | 27.8K | $7M | +0.02% |
| Q3 2021 | 71.2K | $20M | +0.08% |
| Q2 2021 | 179.2K | $62M | +0.23% |
| Q1 2021 | 350.7K | $98M | +0.38% |
| Q4 2020 | 503.2K | $123M | +0.48% |
| Q3 2020 | 524.3K | $149M | +0.62% |
| Q2 2020 | 384.3K | $103M | +0.44% |
| Q1 2020 | 84.4K | $27M | +0.15% |
| Q4 2019 | 2.8K | $824,000 | 0.00% |
| Q3 2019 | 2.8K | $646,000 | 0.00% |
| Q2 2019 | 3.9K | $914,000 | 0.00% |
| Q1 2019 | 3.9K | $924,000 | 0.00% |
| Q4 2018 | 13.2K | $4M | +0.02% |
Common-stock position only; options are excluded. Quarters where the fund filed no 13F or reported no position are absent. See Acadian Asset Management LLC’s full portfolio or all institutional holders of BIIB.