MarketPeel
Insider Trading Intelligence
Head of Development
Fri, Aug 29, 2025
Aug 29
sold $106.70k of BIIB
807 shares @ $132.22
Decreased holdings by -11.40%
Net across this filing: +6.40% (+345 shares)
13th largest trade (out of 80)
Tax WithholdingCluster Buy
Trade made by an officer
Part of a cluster of 2 transactions by 2 insiders
Shares withheld by the issuer to cover taxes on vesting — not a market sale
Net holdings across this filing: +6.4% (+345 shares)
BIIBBIOGEN INC.
Health CareBiotechnology
1D0.00%
1W+5.59%
1M+12.05%
3M
6M
1Y

Recent insider activity at BIIB

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