---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-24-200660"
form_type: "8-K"
ticker: "BIIB"
cik: "0000875045"
company_name: "BIOGEN INC."
filed_at: "2024-08-14T23:59:59+00:00"
generated_at: "2026-05-31T09:32:20.566565+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.4
calibrated_materiality_score: 0.4
confidence: "high"
source: SEC EDGAR
---

# Biogen enters $1.5B unsecured revolving credit facility, terminates prior facility

## Summary
- $1.5B five-year unsecured revolving credit facility; no borrowings drawn at closing.
- Replaces 2020 credit agreement; no outstanding loans at termination.
- Interest rates based on credit ratings: Term SOFR + 0.625%-1.375%; commitment fee 0.05%-0.15%.
- Financial covenant: max consolidated leverage ratio of 3.75:1 (4.25:1 after material acquisition).
- Matures August 2029, includes $25M letter of credit sublimit, $20M swing line.

## SEC filing metadata
- accession: 0001193125-24-200660
- form_type: 8-K
- ticker: BIIB
- cik: 0000875045
- company_name: BIOGEN INC.
- filed_at: 2024-08-14T23:59:59+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.4
- calibrated_materiality_score: 0.4
- confidence: high
- sec_items: 1.01, 1.02, 2.03, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/875045/000119312524200660/0001193125-24-200660-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/875045/000119312524200660/d867868d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-24-200660
- JSON: https://secwatch.observer/filing/0001193125-24-200660.json
- Plain text: https://secwatch.observer/filing/0001193125-24-200660.txt

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