INTEGRAL DIAGNOSTICS LIMITED DISCLOSUREBeneficial Ownership (13D/G / major holdings)

Change in substantial holding from CGF

Sydney Level 2, 5 Martin Place, Sydney NSW 2000 Australia | GPO Box 3698 Sydney NSW 2001 | Telephone 02 9994 7000 Melbourne Level 24, 55 Collins Street, Melbourne VIC 3000 | PO Box 297, Flinders Lane, Melbourne VIC 3000 | Telephone 02 9994 7000 Brisbane Level 6, 215 Adelaide Street, Brisbane QLD 4000 | GPO Box 3234, Brisbane QLD 4000 | Telephone 07 3136 5400 Perth Level 26, 140 St Georges Terrace, Perth WA 6000 | Telephone 08 6466 9613 Adelaide Level 7, Suite 714, 147 Pirie Street, Adelaide SA 5000 | Telephone 08 8427 9511 Challenger Limited ABN 85 106 842 371 | Challenger Group Services Pty Limited ABN 91 085 657 307 Challenger Life Company Limited ABN 44 072 486 938 AFSL 234670 | Challenger Investment Partners Limited ABN 29 092 382 842 AFSL 234 678 Challenger Retirement and Investment Services Limited ABN 80 115 534 453 AFSL295642 RSE Licence No. L0001304 Challenger Mortgage Management Pty Ltd ABN 72 087 271 109 | Challenger Securitisation Management Pty Ltd ABN 56 100 346 898 AFSL 244593 Challenger Investment Solutions Management Pty Ltd ABN 63 130 035 353 AFSL 487354 Level 2, 5 Martin Place Sydney NSW 2000 Australia GPO Box 3698 Sydney NSW 2001 challenger.com.au Telephone 02 9994 7000 4 September 2026 The Manager Company Announcements Office ASX Limited Level 27 39 Martin Place Sydney NSW 2000 By electronic lodgement Dear Sir/Madam Re: Notice of change of interests of substantial holder – Integral Diagnostics Limited (IDX) We attach a notice of change of interests of substantial holder in Integral Diagnostics Limited. This notice is given by Challenger Limited and each of its associated entities named in Annexure 2 to this notice. Yours faithfully Linda Matthews Company Secretary For personal use only 1. Details of substantial holder(1) 02/09/2026 05/09/2025 05/09/2025 Date of change Refer Annexure 1 Particulars of each relevant interest of the substantial holder in voting securities after the change are as follows: Holder of relevant interest Challenger Limited (and its entities listed in Annexure 2) As above As above To  Company Name/Scheme INTEGRAL DIAGNOSTICS LIMITED ACN/ARSN 130 832 816 Name Form 604 Corporations Act 2001 Section 671B Notice of change of interests of substantial holder Challenger Limited (and its entities listed in Annexure 2) The previous notice was given to the c