National Storage Mechanism | Additional information

8 September 2025, 06:00 UTC

The information contained within this announcement is deemed by the Company to constitute inside information as stipulated under the Market Abuse Regulations (EU) No. 596/2014 (MAR) as in force in the United Kingdom pursuant to the European Union (Withdrawal) Act 2018. Upon the publication of this announcement via Regulatory Information Service (RIS), this inside information will be in the public

Arc Minerals Ltd

('Arc Minerals', 'Arc', or the 'Company')

Directorate Change

Arc Minerals (LSE:ARCM) is pleased to announce the appointment of Mr. Abyudi James Shonga Jnr, ("AJ Shonga") as a Non-Executive Director to its Board of Directors effective 5 September 2025. Mr. Shonga is a distinguished Zambian lawyer and State Counsel, currently serving as Managing Partner of Shamwana & Company Advocates.

Mr. Shonga brings over 30 years of legal experience spanning litigation, arbitration, and corporate law, having served as Solicitor General and subsequently Attorney General of the Republic of Zambia. In these senior government roles, Mr. Shonga acted as the chief legal adviser to the Zambian Government, advising on significant legal matters and overseeing legislative affairs. He also sat on various statutory boards during his tenure and has been involved in high-profile domestic and international legal proceedings, including arbitration cases. Notably, Mr. Shonga is a former President of the Law Association of Zambia, reflecting his prominent stature in the legal profession. His extensive background gives him a deep understanding of the legal framework in Zambia.

Mr. Shonga's appointment underscores Arc's commitment to the highest standards of corporate governance and strengthens the Company's in-country expertise as it continues to expand its project portfolio in Zambia. Mr. Shonga's insights into Zambian law and regulation will be invaluable in guiding Arc's legal strategy and supporting regional operations. With his proven track record of advising government and industry at the highest levels, he is well placed to assist Arc in navigating complex regulatory environments and fostering strong stakeholder relationships.

Nick von Schirnding, Executive Chairman, commented:

"I am delighted to welcome AJ to the Board of Arc Minerals. His distinguished legal career, including his role as a previous Attorney General of Zambia, and his deep understanding of Zambia's regulatory landscape combined with a wealth of experience will be an invaluable complement to the existing skillset and expertise of the Board. This appointment further strengthens our Zambian presence, ensuring that we have robust legal and governance expertise to support our strategy. I look forward to working closely with AJ as we progress our exciting projects in Zambia and continue to build value for our shareholders."

AJ Shonga, Non-Executive Director, commented:

"I am honoured to join Arc Minerals' Board at this pivotal time for the Company and I look forward to contributing my experience in legal and regulatory matters to support Arc's ambitions. I am excited to work with the Board and management team to ensure strong governance and to help drive Arc's strategic initiatives forward, particularly within Zambia's dynamic mining sector."

Regulatory Disclosures

Save for the information set out above and below, there are no further disclosures to be made in accordance with Rule 17 and Schedule Two paragraph (g) of the AIM Rules for Companies in respect of the appointment of Mr. Abyudi James Shonga Jnr, aged 57. Mr Shonga has no interest in any ordinary shares in the capital of the Company.

Current Directorships and Partnerships of Mr Shonga	Past Directorships and Partnerships in the last 5 years
Equity Capital Resources plc	None
Shamwana & Company
Unifi Zambia

Forward-looking Statements

This news release contains forward-looking statements that are based on the Company's current expectations and estimates. Forward-looking statements are frequently characterised by words such as "plan", "expect", "project", "intend", "believe", "anticipate", "estimate", "suggest", "indicate" and other similar words or statements that certain events or conditions "may" or "will" occur. Such forward-looking statements involve known and unknown risks, uncertainties and other factors that could cause actual events or results to differ materially from estimated or anticipated events or results implied or expressed in such forward-looking statements. Such factors include, among others: the actual results of current exploration activities; conclusions of economic evaluations; changes in project parameters as plans continue to be refined; possible variations in ore grade or recovery rates; accidents, labour disputes and other risks of the mining industry; delays in obtaining governmental approvals or financing; and fluctuations in metal prices. There may be other factors that cause actions, events or results not to be as anticipated, estimated or intended. Any forward-looking statement speaks only as of the date on which it is made and, except as may be required by applicable securities laws, the Company disclaims any intent or obligation to update any forward-looking statement, whether as a result of new information, future events or results or otherwise. Forward-looking statements are not guarantees of future performance and accordingly undue reliance should not be put on such statements due to the inherent uncertainty therein.

**ENDS**

For further information, contact:

Arc Minerals Ltd Nick von Schirnding (Executive Chairman)	[email protected]

Zeus Capital Ltd ( Nominated Adviser & Joint Broker) Katy Mitchell/Harry Ansell	Tel: +44 (0) 20 3829 5000

Shard Capital Partners LLP (Joint Broker) Damon Heath	Tel: +44 (0) 20 7186 9952

For more information, visit www.arcminerals.com .