Announcement PDF Level 2, 16 Ord Street, West Perth, WA 6005 | PO Box 1064, West Perth, WA 6872 | +61 8 9386 9534 info@horizonminerals.com.au | ACN 007 761 186 | ABN 88 007 761 186 | horizonminerals.com.au ASX: HRZ ASX ANNOUNCEMENT 2 February 2026 APPOINTMENT OF COMPANY SECRETARY AND JOINT COMPANY SECRETARY Horizon Minerals Limited (ASX: HRZ) (“Horizon” or “the Company”) is pleased to advise that the Board has appointed Ms Isabel Macchia as Company Secretary and Mr Brendan Shalders as Joint Company Secretary effective immediately. Ms Macchia will have primary responsibility for the administration of the Company’s corporate governance, compliance and ASX listing obligations. She is a member of the Governance Institute of Australia and has previously served in company secretarial roles at Atlas Iron and Synergy. Mr Shalders, who is also the Company’s Chief Financial Officer, will support Ms Macchia in his role as Joint Company Secretary. Mr Daniel Coletta will continue in his role as Company Secretary until his resignation takes effect on 28 February 2026, to facilitate an orderly transition. For the purposes of ASX Listing Rule 12.6 Mr Daniel Coletta remains the person responsible for communications with the ASX until his resignation takes effect. This announcement is made in accordance with ASX Listing Rule 3.16.1. Authorised for release by the Board of Directors. For further information, please contact: Grant Haywood Michael Vaughan Managing Director and CEO Investor and Media Relations – Fivemark grant.haywood@horizonminerals.com.au michael.vaughan@fivemark.com.au +61 8 9386 9534 +61 422 602 720 JOIN HORIZON MINERALS INTERACTIVE HUB Visit https://investors.horizonminerals.com.au/auth/signup for Horizon Minerals’ Interactive InvestorHub Horizon Minerals Email: info@horizonminerals.com.au