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Mizuho Securities Co. Ltd.

SEC CIK
0001520309
Latest filing
May 7, 2026

BIIB holding history

Biogen Inc. in every 13F filed by Mizuho Securities Co. Ltd., 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 Q1 2026 holdings

Shares (Q4 2022)
0
Sold out in Q4 2022
Value
$0
% of portfolio
0.0%
Quarters held
3
Since Q1 2021
Holdings of BIIB by Mizuho Securities Co. Ltd., by quarter
QuarterSharesValue% of portfolioShare changeActionAll holders
Q4 20220$00.0%−3,840−100.0%Sold outHolders
Q3 20223,840$1.02M0.3%+3,840NewHolders
Q4 20210$00.0%−30−100.0%Sold outHolders
Q3 202130$8.00K<0.1%+30NewHolders
Q2 20210$00.0%−500−100.0%Sold outHolders
Q1 2021500$140.0K<0.1%––Holders

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