---
schema_version: "secwatch.filing_event.v1"
accession: "0000950157-26-000280"
form_type: "8-K"
ticker: "BIIB"
cik: "0000875045"
company_name: "BIOGEN INC."
filed_at: "2026-03-11T23:59:59+00:00"
generated_at: "2026-05-15T15:20:59.682790+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.65
calibrated_materiality_score: 0.65
confidence: "high"
source: SEC EDGAR
---

# Biogen Chief Legal Officer Susan H. Alexander to depart end of May 2026

## Summary
- Susan H. Alexander, Chief Legal Officer, will leave Biogen effective end of May 2026.
- Company has initiated a search to identify the next Chief Legal Officer.
- No interim successor has been named at this time.

## SEC filing metadata
- accession: 0000950157-26-000280
- form_type: 8-K
- ticker: BIIB
- cik: 0000875045
- company_name: BIOGEN INC.
- filed_at: 2026-03-11T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.65
- calibrated_materiality_score: 0.65
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/875045/000095015726000280/0000950157-26-000280-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/875045/000095015726000280/form8-k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000950157-26-000280
- JSON: https://secwatch.observer/filing/0000950157-26-000280.json
- Plain text: https://secwatch.observer/filing/0000950157-26-000280.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.