Announcement PDF ASX: HRZ ASX ANNOUNCEMENT 15 AUGUST 2025 NOTICE OF EXPIRY OF LISTED OPTIONS Horizon Minerals Limited (ASX: HRZ) (“Horizon” or “the Company”) advises that the attached letter and notice of exercise of options form has been sent to registered holders of the Company’s listed options (ASX: HRZO) (“Options”) advising that the Options which are exercisable at $0.087 each will expire at 5:00pm WST on 21 September 2025 (“Expiry Date”). Official quotation of the Options on ASX will cease at close of trading on Tuesday, 16 September 2025, being four business days prior to the expiry date (assumed expiry date for cessation of quotation purposes is Monday, 22 September 2025 given the official expiry date falls on a Sunday). Holders of the Options can exercise all or part of their Options prior to the Expiry Date by providing the Company a completed notice of exercise of options form specifying the number of Options being exercised and the required payment of funds. Authorised for release by the Board of Directors Julian Tambyrajah Chief Financial Officer & Company Secretary Level 2, 16 Ord Street West Perth WA 6005 PO Box 1064 West Perth WA 6872 T: +61 8 9386 9534 E: info@horizonminerals.com.au www.horizonminerals.com.au ACN 007 761 186 ABN 88 007 761 186 15 August 2025 Dear Option Holder NOTICE OF EXPIRY OF LISTED OPTIONS Horizon Minerals Limited (ASX: HRZ) (“Horizon” or “Company”) wishes to advise that you are the registered holder of listed options (ASX: HRZO) (Options) in the Company. The Options are exercisable at $0.087 each and expire at 5:00pm (WST) on 21 September 2025 (Expiry Date). There is no obligation for Option Holders to exercise their Options. However, under paragraph 5.2 of Appendix 6A of the ASX Listing Rules, the Company is required to advise Option Holders of the information contained in this notice. The courses of action available to you as a holder of these soon to expire Options are: a) Exercise your Options If you wish to exercise your Options, you must complete the instructions set out in the “Notice of Exercise of Options” (Notice of Exercise) form accompanying this letter and provide the completed Notice of Exercise together with payment of $0.087 per Option on or before 5:00pm (WST) on 21 September 2025. b) Sell your Options The official quotation of the Options on ASX will cease at close of trading on Tuesday, 16 September 2025, being four business days prior to the expiry date. c) Do nothing and allow your Options to expire If you do not exercise or sell your Options in the manner described above, they will expire at 5:00pm (WST) on 21 September 2025 and your right to subscribe for ordinary shares in the Company at $0.087 per share will lapse. The market sale price of ordinary shares in Horizon on the ASX was $0.048 on Wednesday, 13 August 2025, being two trading days prior to the date of this notice. During the three (3) months preceding the date of this notice: • The highest market sale price of ordinary shares on the ASX was $0.058 on 8 May 2025; and • The lowest market sale price of ordinary shares on the ASX was $0.043 on 1 August 2025. Level 2, 16 Ord Street West Perth WA 6005 PO Box 1064 West Perth WA 6872 T: +61 8 9386 9534 E: info@horizonminerals.com.au horizonminerals.com.au ACN 007 761 186 ABN 88 007 761 186 The total number of Options on issue is 26,723,171. On exercise, each Option entitles the holder to receive one fully paid ordinary share in the capital of the Company. If all of the Options on issue are exercised, 26,723,171 fully paid ordinary shares in the capital of the Company will be issued. If you have any further questions, bianca.taveira@horizonminerals.com.au. please do not hesitate to email Sincerely Julian Tambyrajah CFO and Company Secretary Level 2, 16 Ord Street West Perth WA 6005 PO Box 1064 West Perth WA 6872 T: +61 8 9386 9534 E: info@horizonminerals.com.au horizonminerals.com.au ACN 007 761 186 ABN 88 007 761 186 Horizon Minerals Ltd Level 2 16 Ord Street West Perth WA 6005 *I00000101* Tel: +61 8 9386 9534 HRZO Use a black pen. Print in CAPITAL letters inside the grey areas. A B C 1 2 3 Where a choice is required, mark the box with an ‘X’ X Exercise of Options Notice Options exercisable at $0.087 per Option expiring at 5:00pm AWST on 21 September 2025 These Options are exercisable wholly or in part by the payment of the price above for each Option exercised. Payment has to be received at either of the addresses overleaf, by the time and date stated above. For every one Option exercised, the Optionholder will be allotted one Share in the capital of Horizon Minerals Limited. To be completed by the Optionholder I/We enclose my/our payment for the amount shown above. To the Directors Horizon Minerals Limited I/We the abovementioned being the registered holder(s) of the Options, hereby exercise my/our option for Shares in Horizon Minerals Limited and I/we request you allot to me/us and I/we agree to be bound by the Constitution of the Company. Number of Options to be exercised Amount enclosed at A0.087 per Option Cheque details - Make your cheque or bank draft payable to Horizon Minerals Limited Sign Here - This section must be signed for your instructions to be executed Individual or Optionholder 1 Optionholder 2 Sole Director and Sole Company Secretary Director/Company Secretary Optionholder 3 Director The directors reserve the right to make amendments to this form where appropriate. Refer to lodgement instructions overleaf. This form may not be used to effect a change of address. Please contact Computershare Investor Services Pty Limited on 1300 850 505, or online via the Investor Centre found at www.investorcentre.com/au See back of form for completion guidelines HRZO 7_sam_999999/000001/000002 How to complete this form Exercise your Options in full or part Registration Name(s) Signature(s) The fully paid ordinary shares will be registered in the name(s) printed on the form. You must sign the form as follows in the space provided: Individual: where the holding is in one name, the Optionholder must sign. Joint holding: the holding is in more than one name all of the Optionholders must sign. Power of Attorney: to sign under Power of Attorney, you must have already lodged this document with the registry. Alternatively, attach an originally certified copy of the Power of Attorney to this form when you return it. Companies: this form must be signed by either 2 Directors or a Director and a Company Secretary. Alternatively, where the company has a Sole Director and, pursuant to the Corporations Act, there is no Company Secretary, or where the Sole Director is also the Sole Company Secretary, that Director may sign alone. Delete titles as applicable. Deceased Estate: all executors must sign and, if not already noted by the registry, a certified copy of Probate or Letters of Administration must accompany this form. Options Exercised Enter the number of Options you wish to exercise. Exercise Moneys Enter the amount of exercise moneys. To calculate the amount payable, multiply the number of Options exercised by the exercise price. Payment Make your cheque or bank draft payable to Horizon Minerals Limited in Australian currency and cross it Not Negotiable. Your cheque or bank draft must be drawn on an Australian Bank. Complete the cheque details in the boxes provided. The total amount must agree with the amount shown in box B. Sufficient cleared funds must be held in your account as cheques returned unpaid may not be re-presented and may result in your Exercise of Options Notice being rejected. Pin (do not staple) your cheque(s) to the Exercise of Options Notice. Cash will not be accepted. Receipt for payment will not be forwarded. If you are in any doubt as to how to deal with this document, please consult your Financial or other Personal Advisor. If you have any enquiries concerning your Optionholding, please contact Computershare Investor Services Pty Limited on 1300 850 505. Lodgement of Notice The Exercise of Options Notice must be received at the address below by no later than 5:00pm AWST on 21 September 2025. Payments can be remitted directly to the company's bank account: Account Name: Horizon Minerals Limited BSB: 086-131 Acc: 85-573-7665 Please include your SRN/HIN as a reference. Please contact Chief Financial Officer & Company Secretary Julian Tambyrajah at julian.tambyrajah@horizonminerals.com.au once payment has been made. Alternatively, return the Exercise of Options Notice with cheque(s) attached to Horizon Minerals Limited, PO Box 1064, West Perth WA 6872, Australia. Neither Computershare Investor Services Pty Limited nor Horizon Minerals Limited accepts any responsibility if this Options Notice is lodge at any other address or by any other means. *M000001Q03* HRZO 7_sam_999999/000001/000003/i