Transaction · 0001127602-25-008861

SHERWIN STEPHEN A

SHERWIN STEPHEN A, DIR, reported an open-market or private sale at BIOGEN INC. involving 8760.000000 shares for an estimated $1314141.91. Reported holdings after the transaction were 11318.000000 shares. A 10b5-1 reference was not detected in the stored filing text.

Open-market sellSEC transaction code SDIR
BIIBBIOGEN INC.
Filing timeMar 10
Trade dateMar 07, 2025
Filing · SECView on SEC
InsiderProfile

Price performance since filing

Close on the filing date, the pre-filing context, and the forward return at standard windows
Price at filing
—
Pre-filing
1mo ago1w ago1d ago
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 2025-03-10Filed 543 days ago · 30 days of pre-filing context shaded
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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
Sell
Code S
Identifier
0001127602-25-008861
Common Stock
Transaction date
Mar 07, 2025
Filed Mar 10, 2025, 08:09 PM · 3d delay
Shares
8.76k sh
$15.0k per share
Estimated value
-$131M
Computed from shares × price
Holdings after
11.3k sh
Direct

Filing signal explanations

Badges describe filing facts only — not predictions.

Cluster 14dRepeat 30dPattern $10.0MLarge $100M
Direct Ownership Large Holdings Reduction Large Sale
+6score
Filing-only score

+6

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

Positive filing signal

This filing has a modest positive filing-only score. Treat it as a useful flag for review, not as a buy signal.

Reported relationships & other filings

Form 4 relationship flags and nearby filing context

Reported roles

No officer title

Officer NoDirector Yes10% NoOther No
Footnotes & amended

No footnotes recorded.

Original filing · 0001127602-25-008861
Related transactions

0 other filings

Same reporting owner
Recent company activity

0 recent txs

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