Directorate change

18 June 2026

Glanbia plc (the "Company"), the better nutrition company, announces that:

· Tirlán Co-operative Society Limited ("Tirlán") has agreed to reduce its representation on the Glanbia plc board (the "Board") from two directors to one with effect from 5 August 2026.

· John Murphy and Bill Carroll have informed the Company of their intentions to retire from the Board on 4 August 2026.

· It is proposed that Ger O'Brien will be appointed to the Board as a non-executive director effective 5 August 2026 as the nominee of Tirlán. Ger previously served on the Board between 1 June 2024 and 11 June 2025.

Following this change, the Board will be comprised of 10 Directors: two Executive Directors, the Group Chair and seven Non-Executive Directors of whom one is nominated by Tirlán.

The Company confirms that there are no other matters requiring disclosure under Paragraph 6.1.7 Chapter 6 of the Euronext Dublin Listing Rules and Paragraph 6.4.8 Chapter 6 of the London Stock Exchange Listing Rules.

For further information contact:

Glanbia plc  +353 56 777 2200

Mark Garvey, Chief Financial Officer

Liam Hennigan, Group Secretary & Head of Investor Relations: +353 86 046 8375

Martha Kavanagh, Director of Corporate Affairs: +353 87 646 2006