Transaction · 0001104659-26-012182

Appelhans Dannielle

Appelhans Dannielle, DIR, reported a transaction classified as return at Generation Bio Co. involving 6000.000000 shares. Reported holdings after the transaction were 0.000000 shares. A 10b5-1 reference was not detected in the stored filing text.

returnSEC transaction code DDIR
GBIOGeneration Bio Co.
Filing timeFeb 09
Trade dateFeb 09, 2026
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
$5.34
Pre-filing
1mo ago +2.6%1w ago +5.6%1d ago +0.0%
Returns since
7d +0.0%30d +0.0%90d +0.0%180d +0.0%1y +0.0%

GBIO price since this filing

30 days of pre-filing context and vertical markers at the filing date plus 7d / 30d / 90d / 180d / 1y afterwards
GBIO since 2026-02-09Filed 206 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

Derivative
Type
return
Code D
Identifier
0001104659-26-012182
Stock Option (right to buy)
Transaction date
Feb 09, 2026
Filed Feb 09, 2026, 10:29 PM · 0d delay
Shares
6.00k sh
Price unknown
Estimated value
Computed from shares × price
Holdings after
0 sh
Direct

Filing warnings

Notes recorded with this filing
1 warning
missing priceThe filing did not provide a usable price per share.

Filing signal explanations

Badges describe filing facts only — not predictions.

Cluster 14dRepeat 30dPattern $10.0MLarge $100M
Derivative Transaction Direct Ownership
-14score
Filing-only score

-14

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

No officer title

Officer NoDirector Yes10% NoOther No
Footnotes & amended
  1. F1

    Pursuant to the terms of that certain Agreement and Plan of Merger (the "Merger Agreement"), by and among Generation Bio. Co. (the "Issuer"), XOMA Royalty Corporation ("Parent") and Parent's wholly-ow…

  2. F2

    (continued from footnote 1) which represents the right to receive certain contingent payments in cash in accordance with the terms and subject to the conditions of a contingent value rights agreement…

  3. F3

    Pursuant to the terms of the Merger Agreement, effective as of immediately prior to the Effective Time, each option to purchase shares of Common Stock ("Issuer Option") that was outstanding and unexer…

  4. F4

    Pursuant to the terms of the Merger Agreement, effective as of immediately prior to the Effective Time, each Issuer Option that was outstanding and unexercised as of immediately prior to the Effective…

Original filing · 0001104659-26-012182
Related transactions

0 other filings

Same reporting owner
Recent company activity

0 recent txs

GBIO