MACMAHON HOLDINGS LIMITED — Director's Dealing 2025

Sep 4, 2025

Appendix 3Y Change of Director’s Interest Notice

Rule 3.19A.2

Appendix 3Y

Change of Director’s Interest Notice

Information or documents not available now must be given to ASX as soon as available. Information and documents given to ASX become ASX’s property and may be made public. Introduced 30/09/01 Amended 01/01/11

Name of entity MACMAHON HOLDINGS LIMITED ABN 93 007 634 406

We (the entity) give ASX the following information under listing rule 3.19A.2 and as agent for the director for the purposes of section 205G of the Corporations Act.

Name of Director	MAREE NAOMI ARNASON
Date of last notice	17 July 2025

Part 1 - Change of director’s relevant interests in securities

In the case of a trust, this includes interests in the trust made available by the responsible entity of the trust

Note: In the case of a company, interests which come within paragraph (i) of the definition of “notifiable interest of a director” should be disclosed in this part.

Direct or indirect interest	Direct
Nature of indirect interest(including registered holder)Note: Provide details of the circumstances giving rise to therelevant interest.	Not applicable
Date of change	2 September 2025
No. of securities held prior to change	271,800 Share Rights (unquoted), held in theMacmahonHoldingsLimitedEmployeeShare Ownership Plans Trust in accordancewith the Non-Executive Director SalarySacrifice Plan (FY26 grant).
Class	Share Rights (unquoted)
Number acquired	Nil
Number disposed	271,800

• See chapter 19 for defined terms.

01/01/2011 Appendix 3Y Page 1

Appendix 3Y Change of Director’s Interest Notice

Value/ConsiderationNote: If consideration is non-cash, provide details and estimatedvaluation	ConsiderationrepaidtoMsArnason:$78,214 (pro-rata), under the terms of theNon-Executive Director Salary Sacrifice Plan,as disclosed to the market on 5 July 2018.
No. of securities held after change	Nil
Nature of changeExample: on-market trade, off-market trade, exercise of options,issue of securities under dividend reinvestment plan, participationin buy-back	Lapse of securities issued under Non-Executive Director Salary Sacrifice Plan(2018) due to resignation.

Part 2 – Change of director’s interests in contracts

Note: In the case of a company, interests which come within paragraph (ii) of the definition of “notifiable interest of a director” should be disclosed in this part.

Detail of contract	Not applicable
Nature of interest	Not applicable
Name of registered holder(if issued securities)	Not applicable
Date of change	Not applicable
No. and class of securities towhich interest related prior tochangeNote: Details are only required for a contract inrelation to which the interest has changed	Not applicable
Interest acquired	Not applicable
Interest disposed	Not applicable
Value/ConsiderationNote: If consideration is non-cash, provide detailsand an estimated valuation	Not applicable
Interest after change	Not applicable

Part 3 –[+] Closed period

Part 3 –+Closed period
Were the interests in the securities or contractsdetailed above traded during a+closed period whereprior written clearance was required?	No
If so, was prior-written clearance provided to allow thetrade to proceed during this period?	Not applicable
If prior written clearance was provided, on what datewas this provided?	Not applicable

• See chapter 19 for defined terms.

Appendix 3Y Page 2

01/01/2011