MERCURY NZ LIMITED — Director's Dealing 2022

Sep 22, 2022

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STOCK EXCHANGE LISTINGS: NEW ZEALAND (MCY) / AUSTRALIA (MCY)

NEWS RELEASE

Ongoing Disclosure Notice

23 September 2022

Attached is an Ongoing Disclosure Notice for Vince Hawksworth.

ENDS

Howard Thomas General Counsel and Company Secretary Mercury NZ Limited

For investor relations queries, please contact: William Meek Chief Financial Officer 0275 173 470 investor@mercury.co.nz

For media queries, please contact: Shannon Goldstone Head of Communications Media phone: 027 210 5337 media@mercury.co.nz

ABOUT MERCURY NZ LIMITED

We generate electricity from 100% renewable sources – hydro, geothermal and wind. We also sell utility services to our customers through our retail brands – Mercury, Trustpower and GLOBUG.

We’re listed on the New Zealand Stock Exchange and the Australian Stock Exchange with foreign exempt listed status with the ticker symbol ‘MCY’. The New Zealand Government holds a legislated 51% shareholding in the Company.

Visit us at: www.mercury.co.nz

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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

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----- Start of picture text ----- To NZX Limited; andName of listed issuer: Mercury NZ LimitedDate this disclosure made: 23 September 2022Date of last disclosure: 20 April 2022Director or senior manager giving disclosureFull name(s): Vincent James HawksworthName of listed issuer: Mercury NZ LimitedName of related body corporate (if applicable): Not applicablePosition held in listed issuer: Chief ExecutiveSummary of acquisition or disposal of relevant interest (excluding specified derivatives)Class of affected quoted financial products: Ordinary Shares (NZX: MCY)Power to acquire or dispose of, or tocontrol the acquisition or disposal of,and power to exercise, or to control theNature of the affected relevant interest(s):exercise of, a right to vote attached to,ordinary shares as trustee of theHawksworth Family TrustFor that relevant interest-Number held in class before acquisition or disposal: 30,431Number held in class after acquisition or disposal: 40,431Current registered holder(s): Investment Custodial Services LimitedRegistered holder(s) once transfers are registered: Not applicableSummary of acquisition or disposal of specified derivatives relevant interest (if applicable)Type of affected derivative: Not applicableClass of underlying financial products: Not applicableDetails of affected derivative-The notional value of the derivative (if any) or the notional amount of underlying financialproducts (if any): Not applicableA statement as to whether the derivative is cash settled or physically settled: Not applicableMaturity date of the derivative (if any): Not applicableExpiry date of the derivative(if any): Not applicableThe price specified in the terms of the derivative (if any): Not applicableAny 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 theunderlying financial products:Not applicableFor that derivative,-Parties to the derivative: Not applicableIf the director or senior manager is not a party to the derivative, the nature of the relevantinterest in the derivative: Not applicableDetails of transactions giving rise to acquisition or disposalTotal number of transactions to which notice relates: 1Details of transactions requiring disclosure-Date of transaction: 20 September 2022On-market purchase of ordinary sharesNature of transaction:Name of any other party or parties to the transaction (if known): Unknown----- End of picture text -----

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):

$60,697.70 10,000 No Not applicable Not applicable

Summary of other relevant interests after acquisition or disposal:

Class of quoted financial products: Nature of relevant interest: For that relevant interest,Number held in class: Current registered holder(s): For a derivative relevant interest,Type of derivative:

Details of derivative,-

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's specified terms (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 relevant interest,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:

	Ordinary Shares (NZX: MCY)	Green Bonds in Mercury NZ Limited(NZX: MCY040)
		Power to acquire or dispose of, or to
		control the acquisition or disposal
		of, bonds as trustee of the
	Registered holder	Hawksworth Family Trust
	2,080	100,000
		Investment Custodial Services
	Vincent James Hawksworth	Limited
	Not applicable	Not applicable
	Not applicable
	Not applicable
	Not applicable
	Not applicable
	Not applicable
	Not applicable
	Not applicable
	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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23 September 2022 Garth Landers, Senior Legal Counsel