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Livermore
Livermore
ZHEN

D. E. Shaw & Co., Inc.

SEC CIK
0001009207
Latest filing
Aug 14, 2026

BIIB holding history

Biogen Inc. in every 13F filed by D. E. Shaw & Co., Inc., 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)
74,438
Value
$16.1M
% of portfolio
<0.1%
Quarters held
21
Since Q1 2021
Holdings of BIIB by D. E. Shaw & Co., Inc., by quarter
QuarterSharesValue% of portfolioShare changeActionAll holders
Q2 202674,438$16.1M<0.1%+74,438NewHolders
Q1 20260$00.0%−53,754−100.0%Sold outHolders
Q4 202553,754$9.46M<0.1%−424,170−88.8%ReducedHolders
Q3 2025477,924$66.9M0.1%−888,283−65.0%ReducedHolders
Q2 20251,366,207$171.6M0.2%−219,365−13.8%ReducedHolders
Q1 20251,585,572$217.0M0.3%−24,327−1.5%ReducedHolders
Q4 20241,609,899$246.2M0.3%+1,174,960+270.1%AddedHolders
Q3 2024434,939$84.3M0.1%+220,248+102.6%AddedHolders
Q2 2024214,691$49.8M0.1%−85,317−28.4%ReducedHolders
Q1 2024300,008$64.7M0.1%+276,073+1,153.4%AddedHolders
Q4 202323,935$6.19M<0.1%−254,903−91.4%ReducedHolders
Q3 2023278,838$71.7M0.1%−567,606−67.1%ReducedHolders
Q2 2023846,444$241.1M0.4%−487,546−36.5%ReducedHolders
Q1 20231,333,990$370.9M0.6%−422,092−24.0%ReducedHolders
Q4 20221,756,082$486.3M0.8%+220,767+14.4%AddedHolders
Q3 20221,535,315$409.9M0.7%+179,461+13.2%AddedHolders
Q2 20221,355,854$276.5M0.4%+361,974+36.4%AddedHolders
Q1 2022993,880$209.3M0.3%+396,919+66.5%AddedHolders
Q4 2021596,961$143.2M0.2%+220,470+58.6%AddedHolders
Q3 2021376,491$106.5M0.1%−413,202−52.3%ReducedHolders
Q2 2021789,693$273.4M0.3%+180,453+29.6%AddedHolders
Q1 2021609,240$170.4M0.2%––Holders

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