Howze Yalonda 4

4 · Generation Bio Co. · Filed Feb 4, 2026

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Updated Feb 4, 2026

Generation Bio (GBIO) Interim CEO Yalonda Howze Receives Award

What Happened

Yalonda Howze, Interim CEO & President of Generation Bio (GBIO), had restricted stock units vest and converted/was issued shares on February 2, 2026. The Form 4 shows conversion/exercise-type entries (code M) and a tax-withholding share disposition (code F). As part of the reported activity, 495 shares were withheld to cover tax liability at $5.64 per share, a total withholding value of $2,792.

Key Details

Transaction date: February 2, 2026; Form 4 filed February 4, 2026 (timely filing).
Reported transactions: conversion/exercise of derivative(s) for 1,673 shares (code M) and a tax withholding/disposition of 495 shares at $5.64 each (code F) totaling $2,792. The filing also lists a 1,673-share derivative disposition entry (reported at $0) related to the conversion mechanics.
Shares owned after transaction: not specified in this filing.
Footnotes of note:
- F1: Each restricted stock unit (RSU) represents the right to receive one common share.
- F2: A grant of 53,550 RSUs made April 5, 2023 vested in full on Feb 2, 2026 due to terms of the merger agreement disclosed in the filing.
Transaction codes: M = exercise/conversion of derivative (here, conversion of RSUs into shares); F = payment of exercise price or tax liability (shares withheld to cover taxes).

Context

This was not an open-market purchase or sale for cash; it reflects RSU vesting/conversion and standard tax withholding (a common administrative outcome when equity awards vest).
The vesting was triggered by the company’s merger agreement (per footnote F2), not a market trade that signals personal buying or selling intentions.

Form 4

Period: 2026-02-02

INTERIM CEO AND PRESIDENT

Transactions

Exercise/Conversion
Common Stock
[F1]
2026-02-02+1,673→ 4,254 total
Tax Payment
Common Stock
2026-02-02$5.64/sh−495$2,792→ 3,759 total
Exercise/Conversion
Restricted Stock Units
[F1][F2]
2026-02-02−1,673→ 0 total
→ Common Stock (1,673 underlying)

Footnotes (2)

[F1]Each restricted stock unit represents the right to receive one share of the company's common stock.
[F2]The grant of 53,550 restricted stock units was made on April 5, 2023. Pursuant to the terms of that certain Agreement and Plan of Merger, by and among the Issuer, XOMA Royalty Corporation ("Parent") and Parent's wholly-owned subsidiary, XRA 7 Corp., dated as of December 15, 2025 (the "Merger Agreement"), prior to the effective time of the merger as contemplated by the Merger Agreement, each restricted stock unit of the Issuer that was outstanding and unvested became vested in full on February 2, 2026.

Signature

/s/ Shawna-Gay White, Attorney-in-Fact|2026-02-04

1 file