Belgium - Pursuant to Article 14 of the law of 2 May 2007 on the disclosure of large shareholdings, UCB SA/NV announces that it has received a transparency notification from Wellington Management Group LLP (having its registered offices at 280 Congress Street, Boston, MA 02210, USA) on 20 November 2023.

Wellington Management Group LLP has notified that, following a disposal of UCB shares with voting rights by its affiliates, its shareholding in UCB SA/NV has decreased and it has crossed the 7.5% threshold downwards, on 17 November 2023.

On 17 November 2023, Wellington Management Group LLP (taking into account the holding of its affiliates) owned 14 548 260 UCB shares with voting rights, representing 7.48% of the total number of shares issued by the company (194 505 658), versus 7.80% (15 166 845 UCB shares) in the previous notification dated 16 May 2022.

Content of the notification

Reason for the notification: Acquisition or disposal of voting securities or voting rights.

Notification by: A parent undertaking or a controlling person.

Persons subject to the notification requirement

Date on which the threshold is crossed: 17 November 2023.

Threshold crossed (in %): 7.5%.

Denominator: 194 505 658.

Additional information: Wellington Management Company LLP, Wellington Management International Ltd and Wellington Management Europe GmbH are investment management companies and can exercise the voting rights at their discretion in the absence of specific instructions from the beneficial owners of the shares.

Contact:

Antje Witte

Tel: +32 2 559 94 14

Email: antje.witte@ucb.com

Laurent Schots

Tel: +32 2 559 92 64

Email: laurent.schots@ucb.com

About UCB

UCB, Brussels, Belgium (www.ucb.com) is a global biopharmaceutical company focused on the discovery and development of innovative medicines and solutions to transform the lives of people living with severe diseases of the immune system or of the central nervous system. With approximately 8 600 people in nearly 40 countries, the company generated revenue of EUR 5.8 billion in 2021. UCB is listed on Euronext Brussels.

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