On additional information on a corporate action affecting ordinary shares of Generation Bio Co. (GBIO)

On July 18, 2025, Generation Bio Co. approved a reverse stock split at a ratio of 1-for-10 to be effective on July 21, 2025. Trading is expected to begin on a split-adjusted basis on July 22, 2025. For more details, please, refer to the company’s website.

ITS Ltd. will publish separate notices on the procedures undertaken by ITS Ltd. to process this corporate action outlining how trading in these qualified investments will be carried out.