Transaction · 0000875045-26-000084

Godbout Sean

Godbout Sean, CAO, reported a transaction classified as withholding at BIOGEN INC. involving 8.000000 shares for an estimated $1759.04. Reported holdings after the transaction were 1458.984500 shares. A 10b5-1 reference was not detected in the stored filing text.

withholdingSEC transaction code FCAO
BIIBBIOGEN INC.
Filing timeOct 05
Trade dateOct 02, 2026
Filing · SECView on SEC
InsiderProfile
% of reported position tradedUnavailableCalculated only for code-P purchases and code-S sales.

Row-level estimate for this security and ownership context, not the insider’s complete portfolio. Joint ownership, other transactions in the filing, amendments and footnotes can affect interpretation.

Price performance since filing

Close on the filing date, the pre-filing context, and the forward return at standard windows
Price at filing
$221.99
Pre-filing
1mo ago +0.0%1w ago +0.0%1d ago +0.0%
Returns since
7d30d90d180d1y

BIIB price since this filing

30 days of pre-filing context and vertical markers at the filing date plus 7d / 30d / 90d / 180d / 1y afterwards
BIIB since 2026-10-05Filed yesterday · 1 day of post-filing data
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Filing datePost-filing windows (7d, 30d, 90d, 180d, 1y)30 days of pre-filing context

Transaction facts

Stored Form 4 columns with their raw values

Non-derivative
Type
withholding
Code F
Identifier
0000875045-26-000084
Common Stock
Transaction date
Oct 02, 2026
Filed Oct 05, 2026, 09:00 PM · 3d delay
Shares
8 sh
$219.88 per share
Estimated value
-$1.75k
Computed from shares × price
Holdings after
1.45k sh
Direct

Filing signal explanations

Badges describe filing facts only — not predictions.

Cluster 14dRepeat 30dPattern $100kLarge $1.00M
Direct Ownership
-16score
Filing-only score

-16

Compact filing score computed from stored Form 4 facts. Version v1.

Mixed or weak signal

This filing has a negative filing-only score. It may be less informative as an insider-activity signal and needs extra context.

Reported relationships & other filings

Form 4 relationship flags and nearby filing context

Reported roles

Chief Accounting Officer

Officer YesDirector No10% NoOther No
Footnotes & amended
  1. F1

    Includes 98.3178 shares acquired under the Biogen Inc. employee stock purchase plan on 3/31/2026, 6/30/2026, and 9/30/2026.

  2. F2

    The restricted stock units vest in three equal yearly installments beginning on the first anniversary of the grant date of October 1, 2026.

  3. F3

    The restricted stock units vest in three equal yearly installments beginning on the first anniversary of the grant date of October 2, 2023.

Original filing · 0000875045-26-000084
Related transactions

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Same reporting owner
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