Announcement PDF 605 page 1/2 15July 2001 Form 605 Corporations Act 2001 Section 671B Notice of ceasing to be a substantial holder To Company Name/Scheme MICROBA LIFE SCIENCES LIMITED ACN/ARSN 617 096 652 1. Details of substantial holder (1) BOYSENHOLTZ PTY LTD Name 615 983 090 ACN/ARSN (if applicable) The holder ceased to be a substantial holder on 29/05/2023 The previous notice was given to the company on The previous notice was dated 01/12/2022 01/12/2022 2. Changes in relevant interests Particulars of each change in, or change in the nature of, a relevant interest (2) of the substantial holder or an associate (3) 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: Date of change Person whose relevant interest changed 14/04/23, 03/05/23 & 29/05/23 14/04/23, 03/05/23 & 29/05/23 14/04/23, 03/05/23 & 29/05/23 BOYSENHOLTZ PTY LTD PHILIP HUGENHOLTZ PENELOPE BOYS Nature of change (4) Consideration given in relation to change (5) Class (6) and number of securities affected Person's affected Dilution due to employee option exercises Dilution due to employee option exercises Dilution due to employee option exercises Not applicable Nil Nil Not applicable Nil Nil Not applicable Nil Nil 3. Changes in association The persons who have become associates (3) of, eased to be associates of, or have changed the nature of their association (7) with, the substantial holder in relation to voting interests in the company or scheme are as follows: Name and ACN/ARSN (if applicable) Nature of association N/A 4. Addresses The addresses of persons named in this form are as follows: Name Address BOYSENHOLTZ PTY LTD PHILIP HUGENHOLTZ PENELOPE BOYS Robert Austin CPA, Unit 3 479 Waterworks Road, Ashgrove QLD 4060 35 Central Avenue, Indooroopilly QLD 4068 35 Central C lA d ill Qld 4068 35 Avenue,IIndooroopilly QLD 4068 Signature print name sign here Philip Hugenholtz capacity date 07/07/2023 Sole Director