Notice of Annual General Meeting

Notice of Annual General Meeting

The Company announces that its Annual General Meeting will be held on Thursday 26 June 2025, at the offices of Travers Smith LLP, 10 Snow Hill, London EC1A 2AL, England at 4.00 pm (BST). The Company has published the formal notice of the meeting (the “Notice”) on its website which can be accessed using the following . Proxy voting forms are being posted to all shareholders providing details of how to access the Notice and instructions for voting. A copy of the Notice together with proxy voting forms is being posted to all shareholders who are required to receive or have formally requested to receive these documents.

The Notice contains a letter from the Chairman of the Company, Mr Michael Lynch-Bell, which is set out below in Appendix 1.

The person who arranged for the release of this announcement on behalf of the Company was Andrew Khov, Vice President, Investor Relations and Business Development.

Enquiries

Copies of this announcement are available from the Company's website at .

Neither the Toronto Stock Exchange, nor any other securities regulatory authority, has approved or disapproved of the contents of this announcement.

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Appendix 1

The letter from the Chairman of the Company included in the Notice is reproduced below (without material adjustment or amendment):

Dear Shareholder

This document provides the formal notice (the "Notice") of the 2025 Annual General Meeting of the Company to be held at the offices of Travers Smith LLP, 10 Snow Hill, London EC1A 2AL England on 26 June 2025 at 4.00 p.m. (London time) (the "AGM"). The purpose of the AGM is to seek Shareholders' approval of the resolutions.

Action to be taken by Shareholders

A form of proxy for use by Shareholders accompanies this document. To be valid, forms of proxy must be completed and returned so as to be received at either the offices of the Company's UK Registrar, Computershare Investor Services Plc, The Pavilions, Bridgwater Road, Bristol, BS99 6ZZ or the offices of the Company's Canadian Registrar, Computershare Investor Services Inc., 100 University Avenue, 8th Floor, Toronto, Ontario M5J 2Y1 by not later than 4.00 p.m. (London time) (11.00 a.m. Eastern time) on 24 June 2025. Alternatively, Shareholders can appoint a proxy electronically by going to either (for UK appointments) or (for Canadian appointments) or, if they hold their shares in CREST, Shareholders can appoint a proxy using the CREST electronic proxy appointment service, in each case by not later than 4.00 p.m. (London time) (11.00 a.m. Eastern time) on 24 June 2025 in accordance with the instructions set out in the "Proxy Instructions" section below and the form of proxy.

Completion and return of a form of proxy will not prevent Shareholders from attending and voting in person at the AGM should they so wish.

Beneficial Shareholders (as defined in the "Voting by Beneficial Shareholders" section below on page 11) should note that only registered Shareholders or their duly authorised proxy holders are entitled to vote at the AGM. Each Beneficial Shareholder should ensure that their voting instructions are communicated to the appropriate person well in advance of the AGM.

Electronic Communications

The Company actively encourages all shareholders to register for the electronic communications service. UK Shareholders can elect for electronic communications and manage their shareholdings online at Canadian Shareholders can enrol to receive future securityholder communications electronically by visiting

Background

As I noted in our Annual Report, 2024 was a remarkable year in which the Group achieved some key milestones, including receiving the renewal of the three-year GU trial mining license at the Coringa mine as well as installing and commissioning the classification plant at the Coringa mine. The first five months of 2025 has continued in this way as well, so we are on track with our plans for the current year which will build the platform for further future growth.

The matters being considered at the 2025 Annual General Meeting, as set out in the Notice, are items that are routinely considered at such meetings.

I am very much looking forward to meeting with Shareholders at the AGM and having the opportunity to discuss with them my hopes and expectations for Serabi for the future.

Canadian Designated Foreign Issuer Status

The Company is a "designated foreign issuer" for the purposes of Canadian Securities Administrators’ National Instrument 71-102 - Continuous Disclosure and Other Exemptions Relating to Foreign Issuer ("NI 71-102") and, as such, the Company is not subject to the same ongoing reporting requirements as most other reporting issuers in Canada. Generally, the Company complies with Canadian ongoing reporting requirements by complying with the regulatory requirements of AIM, which is a "foreign regulatory authority" (as defined in NI 71-102), and filing any documents required to be filed with or furnished to AIM with the securities regulatory authorities in Canada.  

Recommendation and importance of vote

The Directors consider that the resolutions set out in the Notice being put to the AGM are in the best interests of the Company and its Shareholders and are most likely to promote the success of the Company for the benefit of the Shareholders as a whole.

Accordingly, the Directors unanimously recommend that Shareholders vote in favour of the proposed resolutions as they intend to do so in respect of their own holdings, where relevant, amounting to an aggregate of 70,066 Ordinary Shares, representing approximately 0.1% of the Company's Ordinary Shares in issue at the date of this document.

Yours faithfully

(Signed) "Michael D Lynch-Bell"

Michael D Lynch-Bell

Non-executive Chairman

Assay Results

Assay results reported within this release are those provided by the Company's own onsite laboratory facilities at Palito and have not yet been independently verified. Serabi closely monitors the performance of its own facility against results from independent laboratory analysis for quality control purpose. As a matter of normal practice, the Company sends duplicate samples derived from a variety of the Company's activities to accredited laboratory facilities for independent verification. Since mid-2019, over 10,000 exploration drill core samples have been assayed at both the Palito laboratory and certified external laboratory, in most cases the ALS laboratory in Belo Horizonte, Brazil. When comparing significant assays with grades exceeding 1 g/t gold, comparison between Palito versus external results record an average over-estimation by the Palito laboratory of 6.7% over this period. Based on the results of this work, the Company's management are satisfied that the Company's own facility shows sufficiently good correlation with independent laboratory facilities for exploration drill samples. The Company would expect that in the preparation of any future independent Reserve/Resource statement undertaken in compliance with a recognised standard, the independent authors of such a statement would not use Palito assay results without sufficient duplicates from an appropriately certificated laboratory.

Forward-looking statements

Certain statements in this announcement are, or may be deemed to be, forward looking statements. Forward looking statements are identified by their use of terms and phrases

such as ‘‘believe’’, ‘‘could’’, “should” ‘‘envisage’’, ‘‘estimate’’, ‘‘intend’’, ‘‘may’’, ‘‘plan’’, ‘‘will’’ or the negative of those, variations or comparable expressions, including references to assumptions. These forward-looking statements are not based on historical facts but rather on the Directors’ current expectations and assumptions regarding the Company’s future growth, results of operations, performance, future capital and other expenditures (including the amount, nature and sources of funding thereof), competitive advantages, business prospects and opportunities. Such forward looking statements reflect the Directors’ current beliefs and assumptions and are based on information currently available to the Directors. A number of factors could cause actual results to differ materially from the results discussed in the forward-looking statements including risks associated with vulnerability to general economic and business conditions, competition, environmental and other regulatory changes, actions by governmental authorities, the availability of capital markets, reliance on key personnel, uninsured and underinsured losses and other factors, many of which are beyond the control of the Company. Although any forward-looking statements contained in this announcement are based upon what the Directors believe to be reasonable assumptions, the Company cannot assure investors that actual results will be consistent with such forward looking statements.

Qualified Persons Statement

The scientific and technical information contained within this announcement has been reviewed and approved by Michael Hodgson, a Director of the Company. Mr Hodgson is an Economic Geologist by training with over 30 years' experience in the mining industry. He holds a BSc (Hons) Geology, University of London, a MSc Mining Geology, University of Leicester and is a Fellow of the Institute of Materials, Minerals and Mining and a Chartered Engineer of the Engineering Council of UK, recognizing him as both a Qualified Person for the purposes of Canadian National Instrument 43-101 and by the AIM Guidance Note on Mining and Oil & Gas Companies dated June 2009.

Notice

Beaumont Cornish Limited, which is authorised and regulated in the United Kingdom by the Financial Conduct Authority, is acting as nominated adviser to the Company in relation to the matters referred herein. Beaumont Cornish Limited is acting exclusively for the Company and for no one else in relation to the matters described in this announcement and is not advising any other person and accordingly will not be responsible to anyone other than the Company for providing the protections afforded to clients of Beaumont Cornish Limited, or for providing advice in relation to the contents of this announcement or any matter referred to in it.

Neither the Toronto Stock Exchange, nor any other securities regulatory authority, has approved or disapproved of the contents of this news release