Ongoing Disclosure Notice

08/06/2026 16:30 NZST, SHINTR3

Attached is an Ongoing Disclosure Notice for Adrian Littlewood.

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

Reputation and Social Impact Lead

09 282 1158

mercurycommunications@mercury.co.nz

ABOUT MERCURY NZ LIMITED

Mercury’s generation assets produce electricity from 100% renewable sources: hydro, geothermal and wind. We’re also a retailer of electricity, gas, broadband and mobile services. We’re listed on the New Zealand Stock Exchange and the Australian Stock Exchange with the ticker symbol ‘MCY’, with foreign exempt listed status. The New Zealand Government holds a legislated minimum 51% shareholding of Mercury.

Visit us at: www.mercury.co.nz