Notice of Annual Shareholders' Meeting

Mercury’s 2025 Annual Shareholders’ Meeting is being held as a hybrid meeting (in person and online) on Friday 19 September 2025. The following materials relating to Mercury’s 2025 Annual Shareholders’ Meeting are shortly being sent to Mercury Shareholders: > Notice of Meeting 2025 > Voting/Proxy Form 2025 > Virtual Meeting Guide 2025 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: Shannon Goldstone Reputation and Social Impact Lead 027 210 5337 mercurycommunications@mercury.co.nz