Biogen Head of Research Jane Grogan Disposes Shares for Tax Withholding Following RSU Vesting
BIOGEN INC.
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Filing Summary
{ "title": "Biogen Inc. (BIIB) - Form 4 Filing Analysis", "color": 3447003, "fields": [ { "name": "Insider", "value": "Jane Grogan (Head of Research)", "inline": true }, { "name": "Transaction Type", "value": "RSU Vesting & Tax Withholding", "inline": true }, { "name": "Shares Withheld (Tax)", "value": "345 @ $253.62 ($87,498.90)", "inline": false }, { "name": "Post-Transaction Holdings", "value": "4,408 shares", "inline": true }, { "name": "Significance", "value": "Low (Routine equity vesting/tax withholding)", "inline": true } ], "footer": { "text": "Filing Date: 2026-11-02" } }
Comprehensive Analysis
Executive Summary
On November 2, 2026, Biogen Inc. ($BIIB) filed a Form 4 for Dr. Jane Grogan, Head of Research, reporting transactions that occurred on October 30, 2026. The filing reflects the vesting of 695 restricted stock units (RSUs) and the automatic withholding of 345 shares of common stock to satisfy tax obligations.
Transaction Details
- Derivative Exercise (Code M): 695 RSUs vested and were converted into 695 shares of Common Stock at $0.00 per share.
- Tax Withholding (Code F): 345 shares of Common Stock were surrendered at $253.62 per share to cover statutory tax withholding obligations, totaling approximately $87,498.90.
- Post-Transaction Beneficial Ownership: Following these transactions, Dr. Grogan directly holds 4,408 shares of Biogen Common Stock.
Significance & Market Context
This transaction is categorized as Low trading significance. It represents a routine equity compensation vesting event and standard tax-withholding disposition rather than a discretionary open-market sale or purchase.
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