Announcement PDF Form 604 Corporations Act 2001 Section 671B Notice of change of interests of substantial holder SGR To:Company Name/Scheme The Secretary Senetas Corporation Limited 312 Kings Way, South Melbourne, VIC, 3205 ABN 33 006 067 607 1. Details of substantial holder Name Madison Park LLC ACN (if applicable) There was a change in the interests of the substantial holder on 22/12/2023 and 29/12/2023 The previous notice was given to the company on 09/12/2023 The previous notice was dated 8/12/2023 (US time) 2. Previous and present voting power: The total number of votes attached to all voting shares in the company or voting interests in the scheme that the substantial holder or an associate had a relevant interest in when last required, and when now required, to give a substantial holding notice to the company or scheme, are as follows: Class of securities Previous Notice Fully paid ordinary shares Person’s votes 211,963,200 Present Notice as at 29/12/2023 Voting power 16.0% Person’s votes 211,963,200* Voting power 13.5% * Reduction in voting power resulting from the dilutive impact on the % holding of Madison Park LLC following the non-renounceable pro rata rights offer announced by Senetas Corporation Limited on 27 November 2023 and completed on 29 December 2023. 3. 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. Date of change Person whose relevant interest changed Nature of change Consideration given in relation to change Class and number of securities affected Person’s votes affected Fully paid ordinary shares 12/05/2022 Madison Park LLC 4/12/2023 Madison Park LLC Change in percentage of voting power is due to the dilutive impact of the share placement by Senetas Corporation Limited on 12 May 2022 Change in percentage of voting power is due to the dilutive impact of the share placement by Senetas Corporation Limited on 4 December 2023 N/A 211,963,200 211,963,200 N/A 211,963,200 211,963,200