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Livermore
Livermore
ZHEN

Renaissance Technologies LLC

SEC CIK
0001037389
Latest filing
Aug 13, 2026

BIIB holding history

Biogen Inc. in every 13F filed by Renaissance Technologies LLC, including the quarters it was sold out or no filing was made. Changes compare share counts with the previous calendar quarter.

BIIB overviewAll 13F holders of BIIBFull Q2 2026 holdings

Shares (Q2 2026)
77,744
Value
$16.8M
% of portfolio
<0.1%
Quarters held
22
Since Q1 2021
Holdings of BIIB by Renaissance Technologies LLC, by quarter
QuarterSharesValue% of portfolioShare changeActionAll holders
Q2 202677,744$16.8M<0.1%−125,652−61.8%ReducedHolders
Q1 2026203,396$37.3M0.1%−195,800−49.0%ReducedHolders
Q4 2025399,196$70.3M0.1%−565,210−58.6%ReducedHolders
Q3 2025964,406$135.1M0.2%−80,700−7.7%ReducedHolders
Q2 20251,045,106$131.3M0.2%+240,600+29.9%AddedHolders
Q1 2025804,506$110.1M0.2%−387,700−32.5%ReducedHolders
Q4 20241,192,206$182.3M0.3%+239,500+25.1%AddedHolders
Q3 2024952,706$184.7M0.3%+334,600+54.1%AddedHolders
Q2 2024618,106$143.3M0.2%−266,598−30.1%ReducedHolders
Q1 2024884,704$190.8M0.3%+126,098+16.6%AddedHolders
Q4 2023758,606$196.3M0.3%−327,791−30.2%ReducedHolders
Q3 20231,086,397$279.2M0.5%−23,140−2.1%ReducedHolders
Q2 20231,109,537$316.1M0.5%−154,300−12.2%ReducedHolders
Q1 20231,263,837$351.4M0.5%+263,561+26.3%AddedHolders
Q4 20221,000,276$277.0M0.4%−154,231−13.4%ReducedHolders
Q3 20221,154,507$308.3M0.4%−391,500−25.3%ReducedHolders
Q2 20221,546,007$315.3M0.4%+501,800+48.1%AddedHolders
Q1 20221,044,207$219.9M0.3%−29,600−2.8%ReducedHolders
Q4 20211,073,807$257.6M0.3%+92,100+9.4%AddedHolders
Q3 2021981,707$277.8M0.4%−348,296−26.2%ReducedHolders
Q2 20211,330,003$460.5M0.6%−608,159−31.4%ReducedHolders
Q1 20211,938,162$542.2M0.7%––Holders

Livermore's 13F data starts with Q1 2021, so Q1 2021 has no change from the previous quarter.