MERCURY NZ LIMITED — Director's Dealing 2026

Jun 8, 2026

Mercury

STOCK EXCHANGE LISTINGS: NZX (MCY) / ASX (MCY)

ANNOUNCEMENT

Ongoing Disclosure Notices

8 June 2026 – 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

The Mercury Building, 33 Broadway, Newmarket 1023
PO Box 90399, Auckland 1142

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NZX

Ongoing Disclosure Notice

Disclosure of Directors and Senior Managers

Relevant Interests

Sections 297(2) and 298(2), Financial Markets

Conduct Act 2013

To NZX Limited; and
Name of listed issuer:
Date this disclosure made:
Date of last disclosure:
Mercury NZ Limited
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8 June 2026
7 August 2023

Director or senior manager giving disclosure

Full name(s):
Name of listed issuer:
Name of related body corporate (if applicable):
Position held in listed issuer:
Adrian Henry Littlewood
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Mercury NZ Limited
Not applicable
Director

Summary of acquisition or disposal of relevant interest (excluding specified derivatives)

Class of affected quoted financial products:
Nature of the affected relevant interest(s):
Ordinary Shares (NZXC: MCY)
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Adrian Henry Littlewood has a relevant interests in 8,320 ordinary shares comprising: (a) 4,160 ordinary shares held by Adrian Littlewood and Claire Littlewood as trustees of the Fairhazel Trust, in which Adrian has a beneficial interest; and (b) 4,160 ordinary shares held by his spouse, Claire Littlewood, under section 235(1)(c) of the Financial Markets Conduct Act 2013, by virtue of having the power to exercise, or to control the exercise of, voting rights attached to those ordinary shares.

For that relevant interest-

Number held in class before acquisition or disposal:
Number held in class after acquisition or disposal:
Current registered holder(s):
Registered holder(s) once transfers are registered:
4,160
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8,320
Adrian Littlewood and Claire Littlewood as trustees of the Fairhazel Trust; and Claire Littlewood.
Not applicable

Summary of acquisition or disposal of specified derivatives relevant interest (if applicable)

Type of affected derivative:
Class of underlying financial products:
Not applicable
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Not applicable

Details of affected derivative-

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The notional value of the derivative (if any) or the notional amount of underlying financial products (if any):

A statement as to whether the derivative is cash settled or physically settled:

Maturity date of the derivative (if any):

Expiry date of the derivative (if any):

The price specified in the terms of the derivative (if any):

Any other details needed to understand how the amount of the consideration payable under the derivative or the value of the derivative is affected by the value of the underlying financial products:

For that derivative,-

Parties to the derivative:

If the director or senior manager is not a party to the derivative, the nature of the relevant interest in the derivative:

Details of transactions giving rise to acquisition or disposal

Total number of transactions to which notice relates:

Details of transactions requiring disclosure-

Date of transaction:

Nature of transaction:

Name of any other party or parties to the transaction (if known):

The consideration, expressed in New Zealand dollars, paid or received for the acquisition or disposal. If the consideration was not in cash and cannot be readily by converted into a cash value, describe the consideration:

Number of financial products to which the transaction related:

If the issuer has a financial products trading policy that prohibits directors or senior managers from trading during any period without written clearance (a closed period) include the following details—

Whether relevant interests were acquired or disposed of during a closed period:

Whether prior written clearance was provided to allow the acquisition or disposal to proceed during the closed period:

Date of the prior written clearance (if any):

Not applicable
Not applicable
Not applicable
Not applicable
Not applicable
Not applicable
2 June 2026
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Acquisition of a relevant interest in 4,160 ordinary shares held by Adrian Henry Littlewood's spouse, Claire Littlewood. Adrian Henry Littlewood has determined that he has a relevant interest in those shares under section 235(1)(c) of the Financial Markets Conduct Act 2013, by virtue of having the power to exercise, or to control the exercise of, voting rights attached to those shares.
Claire Littlewood
$0 (no consideration paid or received)
4,160
Not applicable
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Not applicable
Not applicable

Summary of other relevant interests after acquisition or disposal:

Class of quoted financial products:
Nature of relevant interest:
Not applicable
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Not applicable

For that relevant interest,-

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Number held in class:	Not applicable
Current registered holder(s):	Not applicable
For a derivative relevant interest,-
Type of derivative:	Not applicable

Details of derivative,-

The notional value of the derivative (if any) or the notional amount of underlying financial products (if any):	Not applicable
A statement as to whether the derivative is cash settled or physically settled:	Not applicable
Maturity date of the derivative (if any):	Not applicable
Expiry date of the derivative (if any):	Not applicable
The price's specified terms (if any):	Not applicable
Any other details needed to understand how the amount of the consideration payable under the derivative or the value of the derivative is affected by the value of the underlying financial products:	Not applicable
For that derivative relevant interest,-	Not applicable
Parties to the derivative:	Not applicable
If the director or senior manager is not a party to the derivative, the nature of the relevant interest in the derivative:	Not applicable

Certification

I, certify that, to the best of my knowledge and belief, the information contained in this disclosure is correct and that I am duly authorised to make this disclosure by all persons for whom it is made.
Signature of director or officer:	Not applicable
Date of signature:
or
Signature of person authorised to sign on behalf of director or officer:
Date of signature:	8 June 2026
Name and title of authorised person:	Rebecca Woolacott, Legal & Commercial Manager