3,404 BIIB shares were withheld to cover taxes or exercise cost (CEO) | OQRO Insider tradesWhy it stands out
Routine share withholding; mechanical by default.
Written from the filing's own figures. OQRO describes what was reported and never tells you what to buy or sell
All the details
Dates, kept separate
- Transaction date
- Dec 1, 2025
- Reporting period
- Not applicable
- Filed with the SEC
- Dec 3, 2025
CEOTax withholding
Context
- Classification
tax withholding
Code F — shares delivered to pay exercise price or tax liability
- Planned / mechanical clue
Tax mechanics (code F)
Only flagged when a footnote says so; never inferred
Source receipt
- Record ID
- 0000875045-25-000052
Added to OQROOct 2, 2026, 12:27 PM UTC Data qualityVerified: identifiers matched exactly Reporting personChristopher Viehbacher RelationshipDirector, Officer Officer titlePresident and CEO TableNon-derivative (Table I) Transaction dateDec 1, 2025 Acquired / disposedDisposed (D) Around the same time
Derivative exercise or conversion — not an open-market buy.
Derivative exercise or conversion — not an open-market buy.
Derivative exercise or conversion — not an open-market buy.