MERCURY NZ LIMITED — Director's Dealing 2021

May 17, 2021

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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: 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:

Mercury NZ Limited 17 May 2021 30 March 2021 Vincent James Hawksworth Mercury NZ Limited Not applicable Chief Executive

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 (NZX: MCY) Power to acquire or dispose of, or to control the acquisition of, and power to exercise, or to control the exercise of, Nature of the affected relevant interest(s): a right to vote attached to, ordinary shares as trustee of the Hawksworth Family Trust For that relevant interest- Number held in class before acquisition or disposal: 20,000 Number held in class after acquisition or disposal: 30,000 Current registered holder(s): Investment Custodial Services Limited Registered holder(s) once transfers are registered: Not applicable Summary of acquisition or disposal of specified derivatives relevant interest (if applicable) Type of affected derivative: Not applicable Class of underlying financial products: Not applicable Details of affected 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 specified in the terms of the derivative (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,- 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 Details of transactions giving rise to acquisition or disposal Total number of transactions to which notice relates: 1

Details of transactions requiring disclosure-

Details of transactions requiring disclosure-
Date of transaction:		10 May2021
Nature of transaction:		On market acquisition of ordinaryshares
Name of anyotherpartyorparties to the transaction(if known):		Unknown
The consideration, expressed in New Zealand dollars, paid or received for theacquisition or disposal. If the consideration was not in cash and cannot be readily byconverted into a cash value,describe the consideration:		$69,146.07
Number of financialproducts to which the transaction related:		10,000
If the issuer has a financial products trading policy that prohibits directors or seniormanagers from trading during any period without written clearance (a closed period)include the following details—
Whether relevant interests were acquired or disposed of duringa closedperiod:		No
Whether prior written clearance was provided to allow the acquisition or disposal toproceed duringthe closedperiod:		Not applicable
Date of the prior written clearance (if any):		Not applicable
Summary of other relevant interests after acquisition or disposal:Class ofquoted financialproducts:Nature of relevant interest:_For that relevant interest,- _Number held in class:Current registered holder(s):For a derivative relevant interest,-
		OrdinaryShares(NZX: MCY)
		Registered holder
		2,080
		Vincent James Hawksworth
Type of derivative:		Not applicable
Class ofquoted financialproducts:Nature of relevant interest:_For that relevant interest,- _Number held in class:Current registered holder(s):For a derivative relevant interest,-
		Green bonds in Mercury NZ Limited(NZX: MCY040)
		Power to acquire or dispose of, or tocontrol the acquisition or disposal of,bonds as trustee of the HawksworthFamilyTrust
		50,000
		Investment Custodial Services Limited
Type of derivative:		Not applicable
Details of derivative,-
The notional value of the derivative (if any) or the notional amount of underlyingfinancial products (if any):		Not applicable
A statement as to whether the derivative is cash settled or physically settled:		Not applicable
Maturitydate 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 payableunder the derivative or the value of the derivative is affected by the value of the		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 therelevant 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: Date of signature: or

Signature of person authorised to sign on behalf of director or officer: Date of signature: Name and title of authorised person:

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17 May 2021 Garth Landers, Senior Legal Counsel