SEC 13F Intelligence

Renaissance Technologies LLC / BIIB

Renaissance Technologies LLC’s Biogen Inc Position

Does Renaissance Technologies LLC own Biogen Inc (BIIB)? Yes — 203.4K shares worth $37M (+0.06% of its 13F portfolio) as of Q1 2026, down from 399.2K shares the prior filed quarter.

Position Value
$37M
Q1 2026
Shares
203.4K
% of Portfolio
+0.06%
Quarters Held
26
currently held

Position History BIIB

Reported value by quarter
Q4 ’19: $1.4BQ4 ’19Q1 ’20: $1.4BQ2 ’20: $1.0BQ3 ’20: $1.1BQ4 ’20: $744MQ4 ’20Q1 ’21: $542MQ2 ’21: $461MQ3 ’21: $278MQ4 ’21: $258MQ4 ’21Q1 ’22: $220MQ2 ’22: $315MQ3 ’22: $308MQ4 ’22: $276,996Q4 ’22Q1 ’23: $351,385Q2 ’23: $316,052Q3 ’23: $279,215Q4 ’23: $196,304Q4 ’23Q1 ’24: $190,769Q2 ’24: $143MQ3 ’24: $185MQ4 ’24: $182MQ4 ’24Q1 ’25: $110MQ2 ’25: $131MQ3 ’25: $135MQ4 ’25: $70MQ4 ’25Q1 ’26: $37Mfilingsflow.com
QuarterSharesValue% of Portfolio
Q1 2026203.4K$37M+0.06%
Q4 2025399.2K$70M+0.11%
Q3 2025964.4K$135M+0.18%
Q2 20251.05M$131M+0.17%
Q1 2025804.5K$110M+0.17%
Q4 20241.19M$182M+0.27%
Q3 2024952.7K$185M+0.28%
Q2 2024618.1K$143M+0.24%
Q1 2024884.7K$190,769+0.30%
Q4 2023758.6K$196,304+0.30%
Q3 20231.09M$279,215+0.48%
Q2 20231.11M$316,052+0.46%
Q1 20231.26M$351,385+0.47%
Q4 20221.00M$276,996+0.38%
Q3 20221.15M$308M+0.44%
Q2 20221.55M$315M+0.37%
Q1 20221.04M$220M+0.26%
Q4 20211.07M$258M+0.32%
Q3 2021981.7K$278M+0.36%
Q2 20211.33M$461M+0.57%
Q1 20211.94M$542M+0.67%
Q4 20203.04M$744M+0.81%
Q3 20203.82M$1.1B+1.08%
Q2 20203.91M$1.0B+0.90%
Q1 20204.47M$1.4B+1.37%
Q4 20194.57M$1.4B+1.04%

Common-stock position only; options are excluded. Quarters where the fund filed no 13F or reported no position are absent. See Renaissance Technologies LLC’s full portfolio or all institutional holders of BIIB.