Changes in Beneficial Ownership · 4
Biogen Inc.
BIIBNASDAQEQUITYCurrent
Changes in Beneficial Ownership
Structured filing — 4
form4.xml
Filing details
- Report period
- 2026-09-01
- Issuer
- BIOGEN INC.
- Issuer CIK
- 0000875045
- Trading symbol
- BIIB
Reporting owner 1
- Name
- Parini Michael
- Reporting owner CIK
- 0001661567
- Relationship
- Officer
- Officer title
- Chief Legal Officer
- Address
- 225 BINNEY STREET, CAMBRIDGE, MA, 02142
Derivative transactions
| Security | Conversion / exercise price (USD) | Transaction date | Code | Amount | A / D | Price (USD) | Exercisable | Expires | Underlying security | Underlying shares | Owned after | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Restricted Stock Unit | 0 | 2026-09-01 | A · Form 4 | 7,405 | A | 0 | [F1] | 2029-09-01 | Common Stock | 7,405 | 7,405 | D |
Table key
- A · Form 4
- Acquisition by grant, award or otherwise under Rule 16b-3(d)
- A
- Acquired
- D
- Direct
Footnotes
- F1
- The restricted stock units vest in three equal yearly installments beginning on the first anniversary of the grant date of September 1, 2026.↩ 1
Signature 1
- Signed
- /s/ Bryan Keighery, attorney-in-fact for Mr. Parini
- Date
- 2026-09-03
Company context
Founded in 1978, Biogen is a leading biotechnology company that pioneers innovative science to deliver new medicines to transform patients’ lives and to create value for shareholders and our communities. We apply deep understanding of human biology and leverage different modalities to advance first-in-class treatments or therapies that deliver superior outcomes. Our approach is to take bold risks, balanced with return on investment to deliver long-term growth. We routinely post information that may be important to investors on our website at www.biogen.com. Follow us on social media - Facebook, Instagram, LinkedIn, X, YouTube.