Announcement PDF Horizon Gold Limited ACN: 614 175 923 Suite 8, Level 3, 47 Havelock Street, West Perth WA 6005 | PO Box 39, West Perth WA 6872 Telephone: +61 8 6331 6092 | Email: info@horizongold.com.au | Website: www.horizongold.com.au 16 October 2026 Dear Shareholder Annual General Meeting – Notice and Proxy Form Notice is hereby given that the Annual General Meeting (Meeting) of shareholders of Horizon Gold Limited (ABN 27 614 175 923) (Company) will be held in the Meeting Room of The Country Women’s Association of Western Australia, 1176 Hay Street, West Perth, WA 6005 on Thursday, 19 November 2026 at 9.30am (AWST). In accordance with the Corporations Act 2001 (Cth), the Company will not be sending hard copies of the notice of Meeting (Notice) to shareholders unless a shareholder has previously requested hard copy documents. Instead a copy of the Notice, which was released to the ASX on 16 October 2026, can be viewed and downloaded online as follows: 1. on the Company’s website at https://horizongold.com.au/announcements; or 2. on the Company’s ASX market announcements page (ASX:HRN). Shareholders are encouraged to submit a proxy vote either online at www.investorvote.com.au, or by returning the personalised proxy form (enclosed) in accordance with the instructions set out on the proxy form. Your proxy voting instruction must be received by 9.30 am (WST) on 17 November 2026, being not less than 48 hours before the commencement of the Meeting. Any proxy voting instructions received after that time will not be valid for the Meeting. If you have nominated an email address and have elected to receive electronic communications from the Company, you will also receive an email to your nominated email address with a link to an electronic copy of the important Meeting documents. In order to receive electronic communications from the Company in the future, please update your Shareholder details online at www.investorcentre.com/au and log in with your Username and Password. If it becomes necessary or appropriate to make alternative arrangements to those detailed in the Notice, shareholders will be updated via the Company's website at https://horizongold.com.au/ and the Company's ASX market announcements platform at www.asx.com.au (ASX: HRN). The Notice is important and should be read in its entirety. If you are in doubt as to the course of action you should follow, you should consult your financial adviser, lawyer, accountant or other professional adviser. If you have any difficulties obtaining a copy of the Notice please contact the Company’s share registry, Computershare Investor Services Pty Limited, on 1300 850 505 (within Australia) or +61 3 9415 4000 (overseas). This announcement is authorised for market release by the Board of Horizon Gold Limited. Yours faithfully Trevor O’Connor Company Secretary HORIZON GOLD LIMITED ACN 614 175 923 NOTICE OF ANNUAL GENERAL MEETING Notice is given that the Meeting will be held at: TIME: 9.30am (AWST) DATE: Thursday 19 November 2026 PLACE: Meeting Room The Country Women’s Association of Western Australia 1176 Hay Street West Perth WA 6005 The business of the Meeting affects your shareholding and your vote is important. This Notice of Meeting should be read in its entirety. If Shareholders are in doubt as to how they should vote, they should seek advice from their professional advisers prior to voting. The Directors have determined pursuant to Regulation 7.11.37 of the Corporations Regulations 2001 (Cth) that the persons eligible to vote at the Meeting are those who are registered Shareholders at 4.00pm (AWST) on Tuesday, 17 November 2026. If it becomes necessary or appropriate to make alternative arrangements to those set out in this Notice, the Company will notify Shareholders accordingly via the Company’s website at www.horizongold.com.au and the ASX announcements platform. 1 BUSINESS OF THE MEETING AGENDA FINANCIAL STATEMENTS AND REPORTS To receive and consider the annual financial report of the Company for the financial year ended 30 June 2026 together with the declaration of the directors, the directors' report, the Remuneration Report and the auditor’s report. 1. RESOLUTION 1 – ADOPTION OF REMUNERATION REPORT To consider and, if thought fit, to pass, with or without amendment, the following resolution as a non-binding resolution: “That, for the purposes of section 250R(2) of the Corporations Act and for all other purposes, approval is given for the adoption of the Remuneration Report as contained in the Company’s annual financial report for the financial year ended 30 June 2026.” Note: the vote on this Resolution is advisory only and does not bind the Directors or the Company. Voting exclusion statement In accordance with section 250R of the Corporations Act, a vote on Resolution 1 must not be cast by, or on behalf of a member of the Key Management Personnel whose remuneration details are included in the Remuneration Report, or a Closely Related Party of such a member. However, a vote may be cast by such persons (each a voter) as proxy if the vote is not cast on behalf of a person who is excluded from voting on Resolution 1, and: (a) the voter is appointed as a proxy by writing that specifies the way the proxy is to vote on this Resolution; or (b) the voter is the Chairperson and the appointment of the Chairperson as proxy does not specify the way the proxy is to vote on this Resolution and expressly authorises the Chairperson to exercise the proxy even if this Resolution is connected directly or indirectly with the remuneration of a member of the Key Management Personnel. 2. RESOLUTION 2 – RE-ELECTION OF DIRECTOR – PETER SULLIVAN To consider and, if thought fit, to pass, with or without amendment, the following as an ordinary resolution: “That, for the purpose of rule 14.2 of the Constitution, ASX Listing Rule 14.4 and for all other purposes, Mr Peter Sullivan, a Director, retires by rotation, and being eligible, is re-elected as a Director.” 3. RESOLUTION 3 – INCREASE IN NON-EXECUTIVE DIRECTOR FEE POOL To consider and, if thought fit, to pass with or without amendment, the following as an ordinary resolution: "That, pursuant to and in accordance with Listing Rule 10.17, rule 14.7 of the Constitution and for all other purposes, the maximum aggregate annual amount of fees that may be paid by the Company to all of its Non-executive Directors be increased from $250,000 to $500,000 on the terms and conditions set out in the Explanatory Statement." 2 Voting exclusion statement The Company will disregard any votes cast in favour of this Resolution by or on behalf of any Director of the Company and any associate of any Director of the Company. However, this does not apply to a vote cast in favour of this Resolution by: (a) a person as proxy or attorney for a person who is entitled to vote on this Resolution, in accordance with directions given to the proxy or attorney to vote on this Resolution in that way; or (b) the Chairperson as proxy or attorney for a person who is entitled to vote on this Resolution, in accordance with a direction given to the Chairperson to vote on this Resolution as the Chairperson decides; or (c) a holder acting solely in a nominee, trustee, custodial or other fiduciary capacity on behalf of a beneficiary provided the following conditions are met: (i) the beneficiary provides written confirmation to the holder that the beneficiary is not excluded from voting, and is not an associate of a person excluded from voting, on this Resolution; and (ii) the holder votes on this Resolution in accordance with directions given by the beneficiary to the holder to vote in that way. 4. RESOLUTION 4 – RATIFICATION OF PLACEMENT SHARES UNDER LISTING RULE 7.1 To consider and, if thought fit, to pass with or without amendment, the following as an ordinary resolution: “That, pursuant to and in accordance with Listing Rule 7.4 and for all other purposes, Shareholders ratify the prior issue of 16,666,667 Shares issued under Listing Rule 7.1 pursuant to the Placement, on the terms and conditions in the Explanatory Statement." Voting exclusion statement The Company will disregard any votes cast in favour of this Resolution by or on behalf of a person who participated in the issue of Shares under the Placement or an associate of that person or those persons. However, this does not apply to a vote cast in favour of this Resolution by: (a) a person as proxy or attorney for a person who is entitled to vote on this Resolution, in accordance with directions given to the proxy or attorney to vote on this Resolution in that way; or (b) the Chairperson as proxy or attorney for a person who is entitled to vote on this Resolution, in accordance with a direction given to the Chairperson to vote on this Resolution as the Chairperson decides; or (c) a holder acting solely in a nominee, trustee, custodial or other fiduciary capacity on behalf of a beneficiary provided the following conditions are met: (i) the beneficiary provides written confirmation to the holder that the beneficiary is not excluded from voting, and is not an associate of a person excluded from voting, on this Resolution; and (ii) the holder votes on this Resolution in accordance with directions given by the beneficiary to the holder to vote in that way. 5. RESOLUTION 5 – APPROVAL OF 10% PLACEMENT CAPACITY To consider and, if thought fit, pass the following resolution as a special resolution: “That, for the purposes of Listing Rule 7.1A and for all other purposes, approval is given for the issue of Equity Securities totalling up to 10% of the issued capital of the Company (at the time of issue), calculated in accordance with the formula prescribed in Listing Rule 7.1A.2, and otherwise as set out in the Explanatory Statement.” 3 Voting exclusion statement The Company will disregard any votes cast in favour of the Resolution by or on behalf of a person who is expected to participate in the proposed issue or who will obtain a material benefit as a result of the proposed issue (except a benefit solely in the capacity of a holder of ordinary securities in the entity) or an associate of that person or those persons. However, this does not apply to a vote cast in favour of this Resolution by: (a) a person as proxy or attorney for a person who is entitled to vote on this Resolution, in accordance with directions given to the proxy or attorney to vote on this Resolution in that way; or (b) the Chairperson of the Meeting as proxy or attorney for a person who is entitled to vote on this Resolution, in accordance with a direction given to the Chairperson to vote on this Resolution as the Chairperson decides; or (c) a holder acting solely in a nominee, trustee, custodial or other fiduciary capacity on behalf of a beneficiary provided the following conditions are met: (i) the beneficiary provides written confirmation to the holder that the beneficiary is not excluded from voting, and is not an associate of a person excluded from voting, on this Resolution; and (ii) the holder votes on this Resolution in accordance with directions given by the beneficiary to the holder to vote in that way. Note: As at the date of this Notice, it is not known who may participate in any Equity Securities issued under Resolution 5 and the Company has not approached any Shareholder or identified a class of existing Shareholders to participate in any issue of Equity Securities under the 10% Placement Capacity. Accordingly, no Shareholders are excluded from voting on Resolution 5. 6. RESOLUTION 6 – APPROVAL OF INCENTIVE AWARDS PLAN To consider and, if thought fit, to pass, with or without amendment, the following resolution as an ordinary resolution: “That, for the purposes of Listing Rules 7.2 (Exception 13(b)) and 10.19 and sections 200B and 200E of the Corporations Act and for all other purposes, Shareholders approve the employee incentive scheme of the Company known as the “2026 Horizon Gold Incentive Awards Plan” (Plan), the issue of Equity Securities under that Plan, and the provision of termination benefits under that Plan, on the terms and conditions set out in the Explanatory Statement.” Voting exclusion statement The Company will disregard any votes cast in favour of the Resolution by or on behalf of a person who is eligible to participate in the Plan, an officer of the Company or any of its child entities who is entitled to receive a termination benefit under the Plan, or any Associate of that person or those persons. However, this does not apply to a vote cast in favour of this Resolution by: (a) a person as proxy or attorney for a person who is entitled to vote on this Resolution, in accordance with directions given to the proxy or attorney to vote on this Resolution in that way; or (b) the Chairperson of the Meeting as proxy or attorney for a person who is entitled to vote on this Resolution, in accordance with a direction given to the Chairperson to vote on this Resolution as the Chairperson decides; or (c) a holder acting solely in a nominee, trustee, custodial or other fiduciary capacity on behalf of a beneficiary provided the following conditions are met: (i) the beneficiary provides written confirmation to the holder that the beneficiary is not excluded from voting, and is not an associate of a person excluded from voting, on this Resolution; and (ii) the holder votes on this Resolution in accordance with directions given by the beneficiary to the holder to vote in that way. Voting Prohibition Statement In accordance with section 250BD of the Corporations Act, a person appointed as a proxy must not vote, under that appointment, as a proxy on this Resolution if: (a) the proxy is either: (i) a member of the Key Management Personnel; or (ii) a Closely Related Party of such a member; and (b) the appointment does not specify the way the proxy is to vote on this Resolution. 4 However, the above prohibition does not apply if: (a) the proxy is the Chairperson; and (b) the appointment expressly authorises the Chair to exercise the proxy even if the Resolution is connected directly or indirectly with remuneration of a member of the Key Management Personnel. In accordance with the Corporations Act, if any Shareholder is an existing or potential employee or Director of the Company (or a Related Body Corporate), or an associate of such a person, and wishes to preserve the benefit of this Resolution for that person in respect of any termination benefit provided under the Plan, they should not vote on the Resolution or they will lose the benefit of the Resolution unless, in accordance with section 200E(2B) of the Corporations Act, the vote is as a proxy that specifies how the proxy is to be voted on this Resolution and is not cast on behalf of any of the above persons. Dated: 13 October 2026 By order of the Board Trevor O’Connor Company Secretary Voting in person To vote in person, attend the Meeting at the time, date and place set out above. Voting by proxy To vote by proxy, please complete and sign the enclosed Proxy Form and return your completed Proxy Form by the time and in accordance with the instructions set out on the Proxy Form. In accordance with section 249L of the Corporations Act, Shareholders are advised that: • each Shareholder has a right to appoint a proxy; • the proxy need not be a Shareholder of the Company; and • a Shareholder who is entitled to cast 2 or more votes may appoint 2 proxies and may specify the proportion or number of votes each proxy is appointed to exercise. If the member appoints 2 proxies and the appointment does not specify the proportion or number of the member’s votes, then in accordance with section 249X(3) of the Corporations Act, each proxy may exercise one-half of the votes. Shareholders and their proxies should be aware that changes to the Corporations Act made in 2011 mean that: • if proxy holders vote, they must cast all directed proxies as directed; and • any directed proxies which are not voted will automatically default to the Chairperson, who must vote the proxies as directed. Should you wish to discuss the matters in this Notice of Meeting please do not hesitate to contact the Company Secretary on +61 8 6331 6092. 5 EXPLANATORY STATEMENT This Explanatory Statement has been prepared to provide information which the Directors believe to be material to Shareholders in deciding whether or not to pass the Resolutions. 1. FINANCIAL STATEMENTS AND REPORTS In accordance with the Constitution, the business of the Meeting will include receipt and consideration of the annual financial report of the Company for the financial year ended 30 June 2026, together with the declaration of the directors, the directors’ report, the Remuneration Report and the auditor’s report. The Company will not provide a hard copy of the Company’s annual financial report to Shareholders unless specifically requested to do so. The Company’s annual financial report is available on its website at www.horizongold.com.au. 2. RESOLUTION 1 – ADOPTION OF REMUNERATION REPORT 2.1 General The Corporations Act requires that at a listed company’s annual general meeting, a resolution that the Remuneration Report be adopted must be put to the shareholders. However, such a resolution is advisory only and does not bind the company or the directors of the company. The Remuneration Report sets out the Company’s remuneration arrangements for the Directors and senior management of the Company. The Remuneration Report is part of the directors’ report contained in the annual financial report of the Company for a financial year. The chair of the meeting must allow a reasonable opportunity for its shareholders to ask questions about or make comments on the remuneration report at the annual general meeting. 2.2 Voting consequences A company is required to put to its shareholders a resolution proposing the calling of another meeting of shareholders to consider the appointment of directors of the company (Spill Resolution) if, at consecutive annual general meetings, at least 25% of the votes cast on a remuneration report resolution are voted against adoption of the remuneration report and at the first of those annual general meetings a Spill Resolution was not put to vote. If required, the Spill Resolution must be put to vote at the second of those annual general meetings. If more than 50% of votes cast are in favour of the Spill Resolution, the company must convene a shareholder meeting (Spill Meeting) within 90 days of the second annual general meeting. All of the directors of the company who were in office when the directors' report (as included in the company’s annual financial report for the most recent financial year) was approved, other than the managing director of the company, will cease to hold office immediately before the end of the Spill Meeting but may stand for re-election at the Spill Meeting. Following the Spill Meeting those persons whose election or re-election as directors of the company is approved will be the directors of the company. 6 2.3 Previous voting results At the Company’s previous annual general meeting the votes cast against the Remuneration Report considered at that annual general meeting were less than 25%. Accordingly, the Spill Resolution is not relevant for this Annual General Meeting. 3. RESOLUTION 2 – RE-ELECTION OF DIRECTOR – PETER SULLIVAN 3.1 General ASX Listing Rule 14.4 provides that, other than a managing director, a director of an entity must not hold office (without re-election) past the third annual general meeting following the director's appointment or 3 years, whichever is the longer. However, where there is more than one managing director, only one is entitled not to be subject to re-election. The Constitution sets out the requirements for determining which Directors are to retire by rotation at an annual general meeting. Peter Sullivan, who has served as a director since 7 July 2020 and was last re- elected on 23 November 2023, retires by rotation and seeks re-election. 3.2 Qualifications and other material directorships Mr Sullivan is an engineer with experience as a non-executive director and in senior executive roles, including in chief executive officer and operational roles with gold producers. Mr Sullivan has global experience working in listed and unlisted resource companies. He has 30 years' experience working with ASX-listed resource companies and has a broad strategic perspective and understanding of the long-term cyclical nature of the resources industry. Mr Sullivan is currently a non-executive director of Alliance Nickel Limited (ASX:AXN). Mr Sullivan has been a director of Alliance Nickel since 1996. He was previously Managing Director and CEO of Resolute Mining Limited. 3.3 Board recommendation The Directors (excluding Mr Peter Sullivan) support the re-election of Mr Peter Sullivan and recommend that Shareholders vote in favour of Resolution 2. 4. RESOLUTION 3 – INCREASE IN NON-EXECUTIVE DIRECTOR FEE POOL 4.1 Purpose The purpose of Resolution 3 is to authorise the Directors to increase the fee pool to be paid to the Non-executive Directors on an annual basis. 4.2 General Under Listing Rule 10.17, the Company must not increase the total aggregate amount of Directors' fees payable by the Company to all of its Non-Executive Directors without the approval of holders of its ordinary securities. The Company's Constitution limits the aggregate amount of Directors' fees which the Company may pay to the Non-Executive Directors to an amount or value 7 determined by the Board which does not in any financial year exceed in aggregate the amount last determined by the Company in general meeting. Details of the remuneration paid to the Company's Non-Executive Directors during the financial year ended 30 June 2026 are set out in the Remuneration Report. Shareholder approval is sought to increase the maximum aggregate annual amount of Directors' fees that may be paid by the Company to Non-Executive Directors for the following reasons: (a) to accommodate the number of non-executive directors to be increased in the future as the Company moves to become a gold producer; (b) to attract new Directors of a calibre required to effectively guide and monitor the business of the Company; (c) due to the increased complexity and expected continued growth of the Company and increased responsibilities for non-executive Directors; and (d) to remunerate Non-Executive Directors appropriately for the expectations placed upon them by both the Company and the regulatory environment in which it operates. If Resolution 3 is passed, the Company will be able to proceed to increase the aggregate amount of fees available to be paid to Non-Executive Directors by $250,000 from the current $250,000 per annum to an aggregate amount of $500,000 per annum. If Resolution 3 is not passed, the Company will not be able to proceed to increase the aggregate amount of fees available to be paid to Non-Executive Directors by $250,000 from the current $250,000 per annum to an aggregate amount of $500,000 per annum. This may inhibit the ability of the Company to increase the number of Non-Executive Directors and remunerate, attract and retain appropriately skilled Non-Executive Directors. Resolution 3 is an ordinary resolution. The Chairperson intends to exercise all available undirected proxies in favour of Resolution 3. 4.3 Specific information required by Listing Rule 10.17 The following information in relation to Resolution 3 is provided to Shareholders for the purposes of Listing Rule 10.17: (a) Shareholder approval is being sought to increase the fee pool by $250,000, which would increase the annual remuneration pool from $250,000 to $500,000. (b) Subject to Shareholders approving Resolution 3, the maximum aggregate amount of fees that may be paid to all of the Company’s Non-Executive Directors will be $500,000 per annum. (c) In the last three years, no securities have been issued to non-executive Directors under Listing Rule 10.11 or 10.14. (d) A voting exclusion statement is included in the Notice for Resolution 3. 8 4.4 Board recommendation The Directors are excluded from voting on Resolution 3 pursuant to the Listing Rules. Accordingly, the Directors decline to provide a recommendation to Shareholders on Resolution 3. 5. RESOLUTION 4 – RATIFICATION OF PLACEMENT SHARES UNDER LISTING RULE 7.1 5.1 Background On 4 March 2026, the Company announced a ~$30 million capital raising in the form of a private placement of ~$20 million to institutional and high net worth investors (Placement) and a 1 for 20 non-renounceable entitlement offer to eligible shareholders (Entitlement Offer), both capital raising initiatives to be undertaken at an issue price of $1.20 per Share. In respect of the Placement, the Company issued 16,666,667 Shares at an issue price of $1.20 per Share to the investors under the Placement (Placement Shares). The Placement Shares were issued on Thursday, 12 March 2026, without Shareholder approval pursuant to the Company's 15% placement capacity under Listing Rule 7.1. The investors who participated in the Placement included various institutional and sophisticated investors (Placement Investors) identified by the joint lead managers of the Placement, Evolution Capital Pty Ltd and Sternship Advisers Pty Ltd (Joint Lead Managers). 5.2 General Resolution 4 seeks Shareholder ratification pursuant to and in accordance with Listing Rule 7.4 (and for all other purposes) of the issue of the Placement Shares pursuant to the Company's 15% placement capacity under Listing Rule 7.1. Resolution 4 is an ordinary resolution. The Chairperson intends to exercise all available undirected proxies in favour of Resolution 4. 5.3 Listing Rule 7.1 Broadly speaking, and subject to a number of exceptions, Listing Rule 7.1 limits the amount of Equity Securities that a listed company can issue without the approval of its shareholders over any 12-month period to 15% of the fully paid ordinary securities it had on issue at the start of that period (15% Placement Capacity). Listing Rule 7.4 provides that if the Company in a general meeting ratifies the previous issue of Equity Securities made pursuant to Listing Rule 7.1 (and provided that the previous issue did not breach Listing Rule 7.1) those Equity Securities will be deemed to have been made with Shareholder approval for the purpose of Listing Rule 7.1. The issue of the Placement Shares does not fit within any of the exceptions to Listing Rule 7.1 and, as it has not yet been approved by Shareholders, it effectively uses up part of the Company's 15% Placement Capacity, thereby reducing the Company’s capacity to issue further Equity Securities without Shareholder 9 approval under Listing Rule 7.1 for the 12-month period following the issue of the Placement Shares. If Resolution 4 is passed, the Placement Shares will be excluded in calculating the Company’s 15% Placement Capacity in Listing Rule 7.1, effectively increasing the number of Equity Securities it can issue without Shareholder approval over the 12- month period following the date of issue of the Placement Shares. If Resolution 4 is not passed, the Placement Shares will be included in the Company's 15% Placement Capacity under Listing Rule 7.1, effectively decreasing the number of Equity Securities it can issue without Shareholder approval for the 12-month period following the issue of the Placement Shares. 5.4 Specific information required by Listing Rule 7.5 The following information in relation to Resolution 4 is provided to Shareholders for the purposes of Listing Rule 7.5: (a) The Placement Shares were issued to the Placement Investors, being institutional and sophisticated investors identified by the Joint Lead Managers. No investor under the Placement was a related party, a member of the Company's key management personnel, a substantial Shareholder or an adviser of the Company or an associate of any of those persons. (b) 16,666,667 Shares were issued pursuant to Listing Rule 7.1, ratification of which is sought pursuant to Resolution 4. (c) The Placement Shares are fully paid ordinary shares in the capital of the Company and rank equally in all respects with the Company's existing Shares on issue. (d) The Placement Shares were issued at an issue price of $1.20 per Share, raising a total of $20,000,000 (before costs). (e) The Placement Shares were issued on Thursday, 12 March 2026. (f) The funds raised from the Placement (together with the Entitlement Offer) were, or will be used for: (i) finalising the Feasibility Study for the Gum Creek Gold Project; (ii) further exploration drilling and resource expansion; and (iii) general working capital. The proposed use of funds is indicative only and will be subject to modification on an ongoing basis depending on the results obtained from the Company's activities and other factors relevant to the Board's discretion as to use of funding. (g) The Placement Shares were issued pursuant to placement letters. Under the placement letters, the Placement Investors agreed to be issued Placement Shares at an issue price of $1.20 per Share. (h) Evolution Capital Pty Ltd and Sternship Advisers Pty Ltd acted as the joint lead managers to the Placement pursuant to an engagement letter on 10 standard terms and conditions for a capital raising engagement letter. The Joint Lead Managers received a 2% management fee (plus GST) on the proceeds from the Placement and a 4% selling fee (plus GST) on the proceeds raised from the Placement, other than proceeds subscribed by Zeta Resources Limited, directors and their related entities. (i) A voting exclusion statement is included in the Notice for Resolution 4. 5.5 Board recommendation The Board recommends that Shareholders vote in favour of Resolution 4. 6. RESOLUTION 5 – APPROVAL OF 10% PLACEMENT CAPACITY 6.1 Background Resolution 5 is a special resolution to approve the Company's ability to uti