MarketPeel
Insider Trading Intelligence
Head of Development
Tue, Sep 2, 2025
Sep 2
sold $69.05k of BIIB
517 shares @ $133.55
Decreased holdings by -8.20%
Net across this filing: +6.40% (+345 shares)
21st largest trade (out of 80)
Tax Sell-to-CoverCluster Buy
Trade made by an officer
Part of a cluster of 2 transactions by 2 insiders
Automatic sale to cover taxes on a vest — not a discretionary trade
Net holdings across this filing: +6.4% (+345 shares)
BIIBBIOGEN INC.
Health CareBiotechnology
1D0.00%
1W-0.39%
1M+3.28%
3M+8.29%
6M
1Y

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