ISDN Holdings Limited announced that notice is hereby given that subject to the approval of shareholders at the forthcoming Annual General Meeting to be held on 28 April 2023: For Singapore Shareholders: The Share Transfer Books and Register of Members of ISDN Holdings Limited (the Company) will be closed on 7 July 2023 at 5.00 p.m. for the purpose of determining shareholders' entitlements to the first and final tax-exempt (one-tier) dividend of 0.80 Singapore cents (equivalent to 4.70 Hong Kong cents) per ordinary share for the financial year ended 31 December 2022 (Proposed Dividend). Duly completed registrable transfers received by the Company's Share Registrar, Boardroom Corporate & Advisory Services Pte. Ltd., at 1 Harbourfront Avenue, Keppel Bay Tower, #14-07, Singapore 098632 up to 5.00 p.m. on 7 July 2023 (Record Date) will be registered to determine shareholders' entitlements to the Proposed Dividend.

Members whose Securities Accounts with The Central Depository (Pte) Limited are credited with ordinary shares at 5.00 p.m. on the Record Date will be entitled to the Proposed Dividend. Payment of the Proposed Dividend will be made on or about, 25 August 2023. For Hong Kong Shareholders: The Hong Kong Branch Share Register of the Company will be closed from Saturday, 8 July 2023 to 11 July 2023, both days inclusive, and during this period no transfer of shares will be registered.

In order to qualify for the Proposed Dividend, all completed share transfer forms accompanied with the relevant share certificates must be lodged with the Company's Share Registrar in Hong Kong, Boardroom Share Registrars (HK) Limited, at 2103B, 21/F, 148 Electric Road, North Point, Hong Kong, for registration no later than 4.30 p.m. on 7 July 2023. Payment of the Proposed Dividend will be made on or about 25 August 2023.