Key facts
- This page summarizes Michael Parini's Form 4 filing for BIOGEN INC. (BIIB).
- 1 reported transaction and 1 derivative row are listed below.
- Accepted by SEC: 03 Sep 2026, 16:14.
Michael Parini - 01 Sep 2026 Form 4 Insider Report for BIOGEN INC. (BIIB)
- Reporting relationship
- Chief Legal Officer
- Issuer ticker
- BIIB
- Reported as of
- 01 Sep 2026
- Net transaction value
- $0
- SEC form
- 4
- Accepted by SEC
- 03 Sep 2026, 16:14:24 UTC
- Prior SEC filing
- 12 Aug 2026
- Source filing
- View source filing
- Reporting owner signature
- /s/ Bryan Keighery, attorney-in-fact for Mr. Parini
Source evidence
Original filing metadata and source links for verification.
4 source fields
Reporting owner
1 detail
Key filing fact
Michael Parini filed Form 4 for BIOGEN INC. (BIIB) on 03 Sep 2026.
Change
- Previous filing in this sequence was filed on 12 Aug 2026.
- Current net transaction value: $0.
Research use
- This tells you what this filing adds before you inspect full transaction and derivative tables.
- You can trace every row back to the original SEC filing document.
Evidence
Filed on Form 4
View source filing
Ownership activity is grounded in SEC Form 4 disclosures.
Reporting Owners (1)
CIK 0001661567
Primary reporting owner
Parini Michael
- Relationship
- Chief Legal Officer
- Address
- 225 BINNEY STREET, CAMBRIDGE
- Signature
- /s/ Bryan Keighery, attorney-in-fact for Mr. Parini
- Signature date
- 03 Sep 2026
Reported derivative securities
Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.
BIIB
transaction
Derivative
Restricted Stock Unit
Award
- Transaction value
- Shares
- +7,405
- Change %
- Price
- $0.000000*
- Shares after
- 7,405
- Date
- 01 Sep 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 7,405
- Exercise price
- $0.000000
- Footnotes
- F1
* marks a reported price that did not pass the local price check.
Additional SEC filing notes
Filing notes and footnotes
Explanation of responses 1 footnote
Footnote F1
The restricted stock units vest in three equal yearly installments beginning on the first anniversary of the grant date of September 1, 2026.