# Biogen Inc.: Form SCHEDULE 13D/A, filed Jul 21, 2025

- Company: [Biogen Inc.](/companies/biib.md) (CIK 875045)
- Form: SCHEDULE 13D/A
- Filed: 2025-07-21
- Accepted by EDGAR: Jul 21, 2025, 21:18 ET
- Period: not reported
- Accession: 0000950157-25-000586
- Inline XBRL: no
- Main document: https://www.sec.gov/Archives/edgar/data/875045/000095015725000586/xslSCHEDULE_13D_X01/primary_doc.xml
- All documents and exhibits: https://www.sec.gov/Archives/edgar/data/875045/000095015725000586/

## Sections

Sections are extracted only from 10-K and 10-Q reports. Read this filing’s documents on sec.gov. https://www.sec.gov/Archives/edgar/data/875045/000095015725000586/xslSCHEDULE_13D_X01/primary_doc.xml

Filed Jul 21, 2025.
Source: SEC EDGAR, the filing index for accession 0000950157-25-000586. Last ingested by Listed: Nov 2, 2026, 20:22 ET. No prices; not investment advice.