Announcement PDF Form 604 Corporations Act 2001 Section 671B Notice of change of interests of substantial holder To Company Name/Scheme Buxton Resources Limited (Buxton) ACN/ARSN ACN 125 049 550 1. Details of substantial holder (1) Name IGO Limited (ACN 092 786 304) (IGO) and each of the entities listed in Annexure A (IGO Group Entities) ACN/ARSN (if applicable) See Annexure A There was a change in the interests of the substantial holder on 09/05/2023 The previous notice was given to the company on 25/10/2022 The previous notice was dated 25/10/2022 2. Previous and present voting power The total number of votes attached to all the voting shares in the company or voting interests in the scheme that the substantial holder or an associate (2) had a relevant interest (3) in when last required, and when now required, to give a substantial holding notice to the company or scheme, are as follows: Previous notice Class of securities (4) Ordinary shares 3. Present notice Person’s votes Voting power (5) Person’s votes Voting power (5) 30,962,262 19.90% 31,149,762 18.19% Changes in relevant interests Particulars of each change in, or change in the nature of, a relevant interest of the substantial holder or an associate in voting securities of the company or scheme, since the substantial holder was last required to give a substantial holding notice to the company or scheme are as follows: Class and Person whose Consideration number of Date of Nature of relevant interest given in relation securities Change change (6) changed to change (7) affected 09/05/2023 4. IGO Shares issued pursuant to securities purchase plan announced by Buxton on 11/04/2023 and subsequent dilution as a result of the share issue. $30,000 187,500 Person’s votes affected 187,500 Present relevant interests Particulars of each relevant interest of the substantial holder in voting securities after the change are as follows: Holder of relevant interest IGO Registered holder of securities IGO Person entitled to be registered as holder (8) IGO Nature of relevant interest (6) Registered holder of the shares Class and number of securities 31,149,762 ordinary shares Person’s votes 31,149,762 5. Changes in association The persons who have become associates (2) of, ceased to be associates of, or have changed the nature of their association (9) with, the substantial holder in relation to voting interests in the company or scheme are as follows: Name and ACN/ARSN (if applicable) N/A Nature of association N/A 6. Addresses The addresses of persons named in this form are as follows: Name Address IGO and each company listed in Annexure A Suite 4, Level 5, South Shore Centre, 85 South Perth Esplanade, South Perth, Western Australia Signature print name sign here JOANNE MCDONALD capacity Company Secretary date 11/05/2023 ANNEXURE A This Annexure A of 1 page referred to in Form 604 – Notice of change of interests of substantial holder signed by me and dated 11 May 2023. Joanne McDonald Company Secretary IGO Limited (ACN 092 786 304) Related bodies corporate of IGO Limited (ACN 092 786 304) IGO Nova Holdings Pty Ltd (ACN 009 150 083) IGO Nova Pty Ltd (ACN 146 091 527) IGO Nickel Holdings Pty Ltd (ACN 167 644 519) IGO Stockman Parent Pty Ltd (ACN 124 695 549) IGO Stockman Project Pty Ltd (ACN 124 695 567) IGO Windward Pty Ltd (ACN 158 432 270) IGO Newsearch Pty Ltd (ACN 142 192 701) Flinders Prospecting Pty Ltd (ACN 146 899 863) IGO Lithium Holdings Pty Ltd (ACN 633 371 249) IGO Copper Holdings Pty Ltd (ACN 657 572 793) IGO Cobar Pty Ltd (ACN 657 573 398) Western Areas Ltd (ACN 091 049 357) Western Areas Nickel Pty Ltd (ACN 122 522 696) Australian Nickel Investments Pty Ltd (ACN 111 599 323) BioHeap Ltd (ACN 009 225 398) Western Platinum NL (ACN 097 742 580) IGO Canada Holdings B.C. Ltd (ACN 722556701BC001) IGO Better Futures Pty Ltd (ACN 662 648 277) IGO Downstream Pty Ltd (ACN 664 474 864)