Dividend Reinvestment Plan strike price

Mercury advises that the price at which shares will be transferred for the FY2026 final ordinary dividend under the Company’s Dividend Reinvestment Plan (DRP) is NZ$6.5414 per share. The price has been determined, in accordance with the terms and conditions of the DRP Offer Document, as the average of the daily volume weighted average sale price for a share, calculated on all price setting trades of shares that took place through the NZX Main Board over a period of five trading days starting on 7 September 2026, less a 2.0% discount. Shareholders who have elected to participate in the DRP will receive shares instead of cash in respect of the FY2026 final ordinary dividend payable on 30 September 2026. Attached is an updated Appendix 3A.1 (Notification of Dividend / Distribution) disclosed on the ASX today. ENDS Howard Thomas General Counsel and Company Secretary Mercury NZ Limited For investor relations queries, please contact: Paul Ruediger Head of Business Performance & Investor Relations 027 517 3470 investor@mercury.co.nz For media inquiries, please contact: Catherine Morab Communications 09 282 1158 mercurycommunications@mercury.co.nz