Announcement PDF Dart Mining NL ABN: 84 119 904 880 Level 6, 412 Collins Street Melbourne VIC 3000 Contact: James Chirnside Email: jchirnside@dartmining.com.au Mobile: +61 447 447 613 Webpage: www.dartmining.com.au LinkedIn: Dart Mining NL Twitter: @DartMining 1 | P a g e ASX Release 9th June 2026 DTM enters into binding Sale and Purchase Deed for sale of Mt Unicorn, Sandy Creek, Tallandoon and Corryong Projects to Indigo Metals Limited for $7.1m sale price Dart Mining NL (ASX:DTM) (Company or DTM) is pleased to announce that it has entered into a binding sale and purchase deed with Indigo Metals Limited (ACN 690 861 771) (Indigo) for the sale of the Company’s Mt Unicorn, Sandy Creek, Tallandoon and Corryong projects (together, the Projects) to Indigo in connection with Indigo’s proposed initial public offering and listing on the ASX (Proposed Transaction). HIGHLIGHTS • Total consideration of $7,100,000 (plus GST), comprising a mixture of cash and Indigo shares issued at IPO price • DTM to retain a 2.5% Net Smelter Revenue Royalty on all Antimony production from the Sandy Creek and Tallandoon tenements • Transaction is subject to, and is to be completed in connection with, Indigo's proposed IPO and admission to the official list of the ASX On 17 March 2026, the Company announced that it had entered into a non-binding term sheet with Indigo for the sale of the Projects to Indigo. The Company is pleased to announce that it has now entered into a binding Sale and Purchase Deed (Deed) with Indigo formalising the terms of the Proposed Transaction. DART MINING’S CHAIRMAN, JAMES CHIRNSIDE, COMMENTED: “The execution of the binding Deed with Indigo brings DTM one step closer to realising value from the Mt Unicorn, Sandy Creek, Tallandoon and Corryong Projects. With total consideration of $7,100,000 comprising cash and shares in Indigo, DTM will retain exposure to exploration and development success at the Projects through its equity interest in Indigo, whilst injecting new funds into the Company to continue to drive exploration at the Company’s Triumph and Coonambula projects." Under the Deed, Indigo will acquire 100% of the share capital of Mt Unicorn Holdings Pty Ltd (which holds the Mt Unicorn Project, but excluding the Buckland Gold Project), and the exploration licences comprising Sandy Creek, Tallandoon and Corryong projects from DTM. 2 | P a g e 3447-3696-0313, v. 2 A summary of the key terms of the Deed is set out below. The consideration for the Proposed Transaction comprises: • the payment of $3,600,000 in cash, less all deposit amounts paid to date; and • $3,500,000 worth of fully paid ordinary shares in the capital of Indigo, which will be issued at a deemed price of $0.20 each; and • the grant of a 2.5% Net Smelter Revenue Royalty on all antimony production from any or all of the Sandy Creek Project and the Tallandoon Project. The Proposed Transaction is conditional on satisfaction (or waiver) of the following conditions precedent: • the ASX having given notice of its intent to admit Indigo to the official list of the ASX, subject only to usual or customary conditions; and • the Company's shareholders having approved the Proposed Transaction pursuant to ASX Listing Rule 11.4 (or any other ASX Listing Rule required by ASX), or the Company having received written confirmation from ASX that no such approval is required. Approved for release by the Board of Directors. For more information please contact: James Chirnside Managing Director Dart Mining NL jchirnside@dartmining.com.au +61 419 605 842 InvestorHub Link Terry Bates Director Dart Mining NL tbates@dartmining.com.au