Announcement PDF = Form 603 Corporations Law Section 671B Notice of initial substantial holder To: Company Name/Scheme KALGOORLIE GOLD MINING LIMITED ACN/ARSN 645 666 164 1. Details of substantial holder (1) Name: UBS Group AG and its related bodies corporate ACN/ARSN (if applicable) The holder became a substantial holder on: 13 October 2026 2. Details of 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 on the date the substantial holder became a substantial holder are as follows: Class of securities (4) Number of securities Persons’ votes (5) Voting power (6) Ordinary 37,596,572 37,596,572 6.00% 3. Details of relevant interests The nature of the relevant interest the substantial holder or an associate had in the following voting securities on the date the substantial holder became a substantial holder are as follows: Holder of relevant interest Nature of relevant interest (7) Class and number of securities UBS Securities Australia Ltd Beneficial Owner 37,594,037 Ordinary UBS Switzerland AG Broker has the right to use over this position under a Securities Lending agreement 2535 Ordinary 4. Details of present registered holders The persons registered as holders of the securities referred to in paragraph 3 above are as follows: Holder of relevant interest Registered holder of Securities Person entitled to be registered as holder (8) Class and number of securities UBS Securities Australia Ltd Brispot Nominees Pty Ltd UBS Securities Australia Ltd 37,594,037 Ordinary UBS Switzerland AG Various Custodians UBS Switzerland AG 2535 Ordinary 5. Consideration The consideration paid for each relevant interest referred to in paragraph 3 above, and acquired in the four months prior to the day that the substantial holder became a substantial holder is as follows: Holder of relevant interest Date of acquisition Consideration (9) Class and number of securities Cash Non-cash Please see Appendix A. 6. Associates The reasons the persons named in paragraph 3 above are associates of the substantial holder are as follows: Name and ACN/ ARSN (if applicable) Nature of association UBS Securities Australia Ltd Related body corporate UBS Switzerland AG Related body corporate Brispot Nominees Pty Ltd Related body corporate 7. Addresses The addresses of persons named in this form are as follows: Name and ACN/ ARSN (if applicable) Nature of association UBS Securities Australia Ltd Level 16, Chifley Tower, 2 Chifley Square, Sydney, Australia UBS Switzerland AG Bahnhofstrasse 45, Zürich, Switzerland Brispot Nominees Pty Ltd Level 16, Chifley Tower, 2 Chifley Square, Sydney, Australia SIGNATURE Print Name: Ruby Ko Capacity: Authorised signatory Sign Here: Date: 15 October 2026 Contact details for this notice: -------------------------------------------------------------- Ruby Ko Group Compliance, Operational Risk Control (T) +852 3712 2802 -------------------------------------------------------------- KAL - Appendix A Date of change Person whose relevant interest changed Nature of Change Consideration given in relation to change Number of securities Class 15-Jun-26 UBS Securities Australia Ltd Buy 2,335 80,507 Ordinary 17-Jun-26 UBS Securities Australia Ltd Buy 1,795 57,720 Ordinary 18-Jun-26 UBS Securities Australia Ltd Buy 490 16,339 Ordinary 22-Jun-26 UBS Securities Australia Ltd Buy 655 24,243 Ordinary 25-Jun-26 UBS Securities Australia Ltd Buy 647 24,879 Ordinary 25-Jun-26 UBS Securities Australia Ltd Buy 770 30,805 Ordinary 25-Jun-26 UBS Securities Australia Ltd Buy 1,320 52,813 Ordinary 26-Jun-26 UBS Securities Australia Ltd Buy 603 25,105 Ordinary 29-Jun-26 UBS Securities Australia Ltd Buy 1,743 70,834 Ordinary 30-Jun-26 UBS Securities Australia Ltd Buy 1,988 86,426 Ordinary 30-Jun-26 UBS Securities Australia Ltd Buy 1,308 59,462 Ordinary 30-Jun-26 UBS Securities Australia Ltd Buy 2,901 131,868 Ordinary 02-Jul-26 UBS Securities Australia Ltd Buy 911 35,021 Ordinary 13-Jul-26 UBS Securities Australia Ltd Buy 616 20,525 Ordinary 16-Jul-26 UBS Securities Australia Ltd Buy 3,294 102,937 Ordinary 17-Jul-26 UBS Securities Australia Ltd Buy 3,005 94,488 Ordinary 20-Jul-26 UBS Securities Australia Ltd Buy 580 20,713 Ordinary 04-Aug-26 UBS Securities Australia Ltd Buy 303 12,107 Ordinary 05-Aug-26 UBS Securities Australia Ltd Buy 2,338 89,240 Ordinary 05-Aug-26 UBS Securities Australia Ltd Buy 520 19,999 Ordinary 05-Aug-26 UBS Securities Australia Ltd Buy 123 4,733 Ordinary 07-Aug-26 UBS Securities Australia Ltd Buy 373 13,328 Ordinary 10-Aug-26 UBS Securities Australia Ltd Buy 1,123 40,832 Ordinary 12-Aug-26 UBS Securities Australia Ltd Buy 485 18,671 Ordinary 13-Aug-26 UBS Securities Australia Ltd Buy 3,661 161,260 Ordinary 13-Aug-26 UBS Securities Australia Ltd Buy 1,282 55,726 Ordinary 13-Aug-26 UBS Securities Australia Ltd Buy 903 39,254 Ordinary 14-Aug-26 UBS Securities Australia Ltd Buy 2,687 124,986 Ordinary 14-Aug-26 UBS Securities Australia Ltd Buy 12 540 Ordinary 20-Aug-26 UBS Securities Australia Ltd Buy 2,661 115,689 Ordinary 21-Aug-26 UBS Securities Australia Ltd Buy 1,367 59,455 Ordinary 24-Aug-26 UBS Securities Australia Ltd Buy 3,057 122,274 Ordinary 26-Aug-26 UBS Securities Australia Ltd Buy 728 25,984 Ordinary 28-Aug-26 UBS Securities Australia Ltd Buy 2,032 79,061 Ordinary 31-Aug-26 UBS Securities Australia Ltd Buy 895 38,910 Ordinary 01-Sep-26 UBS Securities Australia Ltd Buy 2,691 122,331 Ordinary 02-Sep-26 UBS Securities Australia Ltd Buy 5,551 211,080 Ordinary 02-Sep-26 UBS Securities Australia Ltd Buy 476 19,829 Ordinary 04-Sep-26 UBS Securities Australia Ltd Buy 3,074 127,563 Ordinary 07-Sep-26 UBS Securities Australia Ltd Buy 4,722 208,940 Ordinary 07-Sep-26 UBS Securities Australia Ltd Buy 456 20,738 Ordinary 08-Sep-26 UBS Securities Australia Ltd Buy 2,273 98,828 Ordinary 09-Sep-26 UBS Securities Australia Ltd Buy 9 370 Ordinary 14-Sep-26 UBS Securities Australia Ltd Buy 13,813 664,108 Ordinary 14-Sep-26 UBS Securities Australia Ltd Buy 2,568 127,739 Ordinary 14-Sep-26 UBS Securities Australia Ltd Buy 1,894 93,748 Ordinary 18-Sep-26 UBS Securities Australia Ltd Buy 2,403 109,227 Ordinary 18-Sep-26 UBS Securities Australia Ltd Buy 500,000 25,000,000 Ordinary 21-Sep-26 UBS Securities Australia Ltd Buy 11,769 498,698 Ordinary 21-Sep-26 UBS Securities Australia Ltd Buy 451 18,812 Ordinary 22-Sep-26 UBS Securities Australia Ltd Buy 3,251 162,526 Ordinary 29-Sep-26 UBS Securities Australia Ltd Buy 380 18,119 Ordinary 29-Sep-26 UBS Securities Australia Ltd Buy 1,345 64,071 Ordinary 30-Sep-26 UBS Securities Australia Ltd Buy 2,899 144,966 Ordinary 01-Oct-26 UBS Securities Australia Ltd Buy 11,780 620,000 Ordinary 01-Oct-26 UBS Securities Australia Ltd Buy 3,595 179,730 Ordinary 06-Oct-26 UBS Securities Australia Ltd Buy 4,889 257,324 Ordinary 07-Oct-26 UBS Securities Australia Ltd Buy 5,563 299,112 Ordinary 08-Oct-26 UBS Securities Australia Ltd Buy 103 5,730 Ordinary 13-Oct-26 UBS Securities Australia Ltd Buy 1,767 93,010 Ordinary 13-Oct-26 UBS Securities Australia Ltd Buy 11 594 Ordinary 13-Oct-26 UBS Securities Australia Ltd Buy 1,092 59,036 Ordinary 13-Oct-26 UBS Securities Australia Ltd Buy 217,226 10,861,302 Ordinary