MONADELPHOUS GROUP LIMITED — AGM Information 2021

Oct 17, 2021

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18 October 2021

Company Announcements Australian Securities Exchange Limited Level 4, 20 Bridge Street SYDNEY NSW 2000 AUSTRALIA

Dear Sir / Madam

RE: Letter to shareholders regarding the Company’s Annual General Meeting

Please find attached a copy of a letter sent to shareholders today regarding the Company’s Annual General Meeting.

Authorised by

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Philip Trueman Company Secretary

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18 October 2021

Dear Shareholders

Monadelphous Group Limited – Notice of Annual General Meeting

Monadelphous Group Limited (ASX: MND) (“Monadelphous” or “the Company”) advises that the Company’s 2021 Annual General Meeting (“AGM”) will be held on Tuesday 23 November 2021 at 10:00am (AWST) at The University Club, University of Western Australia (“UWA”), Crawley, in the theatre auditorium, and online via the Lumi software platform.

In accordance with the Treasury Laws Amendment (2021 Measures No. 1) Act 2021 (Cth), the Company will not be sending physical copies of the Notice of AGM to Shareholders unless an express instruction has been provided by the Shareholder to the Company’s share registry, Computershare. Instead, the Notice of AGM can be viewed and downloaded from the Company’s website at www.monadelphous.com.au/investors/shareholder-meetings/.

Your participation in the AGM is important to us. Accordingly, the Company has adopted measures to allow Shareholders to either attend the AGM in person or to participate via an online platform (Lumi). Instructions on how to access the Lumi software platform can be found in the Notice of AGM.

While Shareholders are able to attend the AGM, to minimise health risks created by the COVID-19 pandemic, Monadelphous encourages Shareholders to consider lodging a directed proxy or joining the meeting via the Lumi software platform rather than attending the meeting in person. The Company will adhere to all social gathering and physical distancing measures in effect (to comply with Federal and State Government restrictions for physical gatherings) at the AGM. Shareholders attending the Meeting will need to ensure they comply with any applicable protocols or requirements.

Shareholders can lodge a proxy vote online at www.investorvote.com.au or return completed proxy forms by: • Post : to Computershare Investor Services Pty Limited, GPO Box 242, Melbourne, Vic 3001; or

• Fax : 1800 783 447 within Australia or +61 3 9473 2555 outside Australia.

Your proxy voting instruction must be received by 10:00 am (AWST) on Sunday, 21 November 2021 to be valid for the AGM. A copy of your personalised proxy form (with instructions on how to lodge your proxy) is enclosed with this letter for your convenience.

Further information is contained in the Notice of AGM. If you have any difficulties obtaining a copy of the Notice of AGM please contact Computershare, on 1300 364 961 (within Australia) or +61 3 9946 4415 (Overseas).

In the event that it is necessary or appropriate for the Company to make alternative arrangements for the AGM, the Company will update shareholders by way of an ASX announcement and updated details will also be made available on our website at www.monadelphous.com.au.

Yours sincerely

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Philip Trueman Company Secretary