---
schema_version: "secwatch.filing_event.v1"
accession: "0000875045-22-000013"
form_type: "8-K"
ticker: "BIIB"
cik: "0000875045"
company_name: "BIOGEN INC."
filed_at: "2022-05-03T23:59:59+00:00"
generated_at: "2026-06-26T01:47:39.791978+00:00"
event_type: "leadership"
sentiment: "negative"
materiality_score: 0.85
calibrated_materiality_score: 0.85
confidence: "high"
source: SEC EDGAR
---

# Biogen Q1 revenue down 6%, EPS miss; CEO Michel Vounatsos to step down; ADUHELM infrastructure cut

## Summary
- Q1 revenue $2.532B (-6% YoY); GAAP EPS $2.06, Non-GAAP EPS $3.62, both impacted by $0.76 ADUHELM write-offs
- Company to eliminate most ADUHELM commercial infrastructure after negative Medicare coverage decision
- Completed sale of biosimilar JV stake for up to $2.3B in April; reaffirmed 2022 financial guidance
- CEO Michel Vounatsos to step down; search for successor underway; he remains CEO during interim period

## SEC filing metadata
- accession: 0000875045-22-000013
- form_type: 8-K
- ticker: BIIB
- cik: 0000875045
- company_name: BIOGEN INC.
- filed_at: 2022-05-03T23:59:59+00:00
- event_type: leadership
- sentiment: negative
- materiality_score: 0.85
- calibrated_materiality_score: 0.85
- confidence: high
- sec_items: 2.02, 5.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/875045/000087504522000013/0000875045-22-000013-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/875045/000087504522000013/biib-20220503.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000875045-22-000013
- JSON: https://secwatch.observer/filing/0000875045-22-000013.json
- Plain text: https://secwatch.observer/filing/0000875045-22-000013.txt

## Key facts
- Executive change
  Michel Vounatsos departed as Chief Executive Officer at BIOGEN INC..
  - Action: stepping down
  - Role: Chief Executive Officer
  source text: Mr. Vounatsos will remain on the Board of Directors of Biogen until he steps down from his CEO position.
  evidence_url: https://www.sec.gov/Archives/edgar/data/875045/000087504522000013/0000875045-22-000013-index.htm

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