---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-24-247628"
form_type: "8-K"
ticker: "BIIB"
cik: "0000875045"
company_name: "BIOGEN INC."
filed_at: "2024-10-30T23:59:59+00:00"
generated_at: "2026-05-30T08:45:50.966994+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.65
calibrated_materiality_score: 0.65
confidence: "high"
source: SEC EDGAR
---

# Biogen CFO Michael McDonnell to retire Feb 2025; Robin Kramer named successor

## Summary
- Michael McDonnell to retire as CFO effective February 28, 2025, after serving since August 2020.
- Robin Kramer, current Chief Accounting Officer, appointed CFO effective upon McDonnell's retirement.
- Kramer's base salary $750,000; target bonus 80% of base; 2025 target LTI grant $3.75 million.
- Kramer joined Biogen in 2018, served as CAO since 2020, also leads Treasury, procurement, and global business services.

## SEC filing metadata
- accession: 0001193125-24-247628
- form_type: 8-K
- ticker: BIIB
- cik: 0000875045
- company_name: BIOGEN INC.
- filed_at: 2024-10-30T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.65
- calibrated_materiality_score: 0.65
- confidence: high
- sec_items: 5.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/875045/000119312524247628/0001193125-24-247628-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/875045/000119312524247628/d890797d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-24-247628
- JSON: https://secwatch.observer/filing/0001193125-24-247628.json
- Plain text: https://secwatch.observer/filing/0001193125-24-247628.txt

## Key facts
- Executive change
  Michael McDonnell departed as Chief Financial Officer at BIOGEN INC..
  - Action: retire
  - Role: Chief Financial Officer
  source text: On October 28, 2024, Michael McDonnell, Chief Financial Officer of Biogen Inc. (the “Company”) notified the Company that he will retire from the Company effective February 28, 2025.
  evidence_url: https://www.sec.gov/Archives/edgar/data/875045/000119312524247628/0001193125-24-247628-index.htm
- Executive change
  Robin Kramer was appointed as Chief Financial Officer at BIOGEN INC..
  - Action: appointed
  - Role: Chief Financial Officer
  source text: Robin Kramer, the Company’s Chief Accounting Officer and Head of Global Business Services and Treasury has been appointed Chief Financial Officer effective upon Mr. McDonnell’s retirement.
  evidence_url: https://www.sec.gov/Archives/edgar/data/875045/000119312524247628/0001193125-24-247628-index.htm

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