Key facts
- This page summarizes Priya Singhal's Form 4 filing for BIOGEN INC. (BIIB).
- 7 reported transactions and 2 derivative rows are listed below.
- Accepted by SEC: 10 Feb 2026, 17:05.
Priya Singhal - 06 Feb 2026 Form 4 Insider Report for BIOGEN INC. (BIIB)
- Reporting relationship
- Head of Development
- Issuer ticker
- BIIB
- Reported as of
- 06 Feb 2026
- Net transaction value
- -$1,028,060
- SEC form
- 4
- Accepted by SEC
- 10 Feb 2026, 17:05:47 UTC
- Prior SEC filing
- 03 Feb 2026
- Next SEC filing
- 17 Feb 2026
- Source filing
- View source filing
- Reporting owner signature
- /s/ Wendell Taylor, attorney-in-fact for Priya Singhal
Source evidence
Original filing metadata and source links for verification.
5 source fields
Reporting owner
1 detail
Key filing fact
Priya Singhal filed Form 4 for BIOGEN INC. (BIIB) on 10 Feb 2026.
Change
- Previous filing in this sequence was filed on 03 Feb 2026.
- Current net transaction value: -$1,028,060.
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 0001769608
Primary reporting owner
Singhal Priya
- Relationship
- Head of Development
- Address
- 225 BINNEY, CAMBRIDGE
- Signature
- /s/ Wendell Taylor, attorney-in-fact for Priya Singhal
- Signature date
- 10 Feb 2026
Reported non-derivative transactions
Shares, units, or other non-derivative securities reported in this filing.
BIIB
transaction
Common Stock
Options Exercise
- Transaction value
- $0
- Shares
- +2,217
- Change %
- +35%
- Price
- $0.000000
- Shares after
- 8,488
- Date
- 06 Feb 2026
- Ownership
- Direct
BIIB
transaction
Common Stock
Tax liability
- Transaction value
- $212,446
- Shares
- -1,056
- Change %
- -12%
- Price
- $201.18
- Shares after
- 7,432
- Date
- 06 Feb 2026
- Ownership
- Direct
BIIB
transaction
Common Stock
Options Exercise
- Transaction value
- $0
- Shares
- +4,683
- Change %
- +63%
- Price
- $0.000000
- Shares after
- 12,115
- Date
- 06 Feb 2026
- Ownership
- Direct
BIIB
transaction
Common Stock
Tax liability
- Transaction value
- $284,066
- Shares
- -1,412
- Change %
- -12%
- Price
- $201.18
- Shares after
- 10,703
- Date
- 06 Feb 2026
- Ownership
- Direct
BIIB
transaction
Common Stock
Sale
- Transaction value
- $531,548
- Shares
- -2,660
- Change %
- -25%
- Price
- $199.83
- Shares after
- 8,043
- Date
- 09 Feb 2026
- Ownership
- Direct
Reported derivative securities
Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.
BIIB
transaction
Derivative
Restricted Stock Unit
Options Exercise
- Transaction value
- $0
- Shares
- -2,217
- Change %
- -50%
- Price
- $0.000000
- Shares after
- 2,217
- Date
- 06 Feb 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 2,217
- Exercise price
- $0.000000
- Footnotes
- F1
BIIB
transaction
Derivative
Restricted Stock Unit
Options Exercise
- Transaction value
- $0
- Shares
- -4,683
- Change %
- -33%
- Price
- $0.000000
- Shares after
- 9,367
- Date
- 06 Feb 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 4,683
- Exercise price
- $0.000000
- Footnotes
- F2
* marks a reported price that did not pass the local price check.
Additional SEC filing notes
Filing notes and footnotes
Rule 10b5-1 trading plan
These transactions were reported as open-market trades under a Rule 10b5-1 plan. The plan lets an insider set trading instructions in advance, which can reduce the risk of trading while in possession of material nonpublic information.
Original filing language: transaction made pursuant to a contract, instruction, or written plan intended to satisfy Rule 10b5-1(c).
Explanation of responses 2 footnotes
Footnote F1
The restricted stock units vest in three (3) equal annual installments, commencing one year after the grant date of 02/07/2024.
Footnote F2
The restricted stock units vest in three equal yearly installments beginning on the first anniversary of the grant date of February 6, 2025.