Announcement PDF Atturra Limited ABN 34 654 662 638 ASX Announcement 8 September 2025 Change of Director’s Interest Notice - Correction Sydney, 8 September 2025 – Atturra Limited (ASX: ATA or “Atturra” or the “Company”) refers to the Appendix 3Y lodged today to report the lapsing of performance rights held by Mr Stephen Kowal. The Company advises that there is a typographical error in the Appendix 3Y which incorrectly records the number of fully paid ordinary shares held by Mr Kowal in the “No. of securities held after change” section. There has been no movement in Mr Kowal’s direct holding and the correct number of fully paid ordinary shares directly held by Mr Kowal is 100,000, not 40,000. An amended Appendix 3Y is attached to correct the error. No other changes have been made to the Appendix 3Y. - ENDS This announcement has been authorised for release by the CEO and Managing Director of Atturra Limited. About Atturra: Atturra is an ASX-listed technology business providing a range of enterprise advisory, consulting, IT services and solutions with a focus on local government, utilities, education, defence, federal government, financial services and manufacturing industries, Atturra has partnerships with leading global providers including Boomi, Cisco, Denodo, HP, HPE, Infor, Microsoft, Nuix, OpenText, QAD, SAP, Smartsheet, and Snowflake, and its clients are some of the largest public and private sector organisations in Australia. For more information visit: www.atturra.com. Contact: Investors Danny Younis P: 02 8260 7919 E: investorrelations@atturra.com Media Dylan Marks P: 02 8260 7918 E: media@atturra.com Appendix 3Y Change of Director’s Interest Notice Rule 3.19A.2 Appendix 3Y Change of Director’s Interest Notice Information or documents not available now must be given to ASX as soon as available. Information and documents given to ASX become ASX’s property and may be made public. Introduced 30/09/01 Amended 01/01/11 Name of entity Atturra Limited ABN 34 654 662 638 We (the entity) give ASX the following information under listing rule 3.19A.2 and as agent for the director for the purposes of section 205G of the Corporations Act. Name of Director Date of last notice Stephen Kowal 8 April 2025 Part 1 - Change of director’s relevant interests in securities In the case of a trust, this includes interests in the trust made available by the responsible entity of the trust Note: In the case of a company, interests which come within paragraph (i) of the definition of “notifiable interest of a director” should be disclosed in this part. Direct or indirect interest Nature of indirect interest (including registered holder) Note: Provide details of the circumstances giving rise to the relevant interest. Date of change No. of securities held prior to change Direct SWK Family Pty Ltd (ACN 645 935 155) Mr Kowal is the sole Director and shareholder of SWK Family Pty Ltd and a potential beneficiary Kowal Holdings Pty Ltd (Kowal Fund A/C) Mr Kowal is the sole Director and shareholder of Kowal Holdings Pty Ltd and a potential beneficiary 2 September 2025 1. Stephen Kowal (Direct) 100,000 Fully Paid Ordinary Shares 444,444 Performance Rights 2. SWK Family Pty Ltd (Indirect) 5,072,943 Fully Paid Ordinary Shares 1,875,114 Performance Rights Class + See chapter 19 for defined terms. 01/01/2011 3. Kowal Holdings Pty Ltd (Indirect) 80,000 Fully Paid Ordinary Shares Performance Rights Appendix 3Y Page 1 Appendix 3Y Change of Director’s Interest Notice Number acquired N/A Number disposed 622,614 Value/Consideration Note: If consideration is non-cash, provide details and estimated valuation NIL 1. Stephen Kowal (Direct) 100,000 Fully Paid Ordinary Shares 444,444 Performance Rights No. of securities held after change 2. SWK Family Pty Ltd (Indirect) 5,072,943 Fully Paid Ordinary Shares 1,252,500 Performance Rights Nature of change Example: on-market trade, off-market trade, exercise of options, issue of securities under dividend reinvestment plan, participation in buyback 3. Kowal Holdings Pty Ltd (Indirect) 80,000 Fully Paid Ordinary Shares Lapse of Performance Rights Part 2 – Change of director’s interests in contracts Note: In the case of a company, interests which come within paragraph (ii) of the definition of “notifiable interest of a director” should be disclosed in this part. Detail of contract N/A Nature of interest N/A Name of registered holder (if issued securities) N/A Date of change N/A No. and class of securities to which N/A interest related prior to change Note: Details are only required for a contract in relation to which the interest has changed Interest acquired N/A Interest disposed N/A Value/Consideration N/A Interest after change N/A Note: If consideration is non-cash, provide details and an estimated valuation + See chapter 19 for defined terms. Appendix 3Y Page 2 01/01/2011 Appendix 3Y Change of Director’s Interest Notice Part 3 – +Closed period Were the interests in the securities or contracts detailed NO above traded during a +closed period where prior written clearance was required? If so, was prior written clearance provided to allow the N/A trade to proceed during this period? If prior written clearance was provided, on what date was N/A this provided? + See chapter 19 for defined terms. 01/01/2011 Appendix 3Y Page 3