Sino-Ocean Service Holding Limited released its 2025 Annual Report, accompanying circular and notice of Annual General Meeting (AGM) on 28 April 2026.

Key disclosures:

1. Document availability • The 2025 Annual Report, AGM circular and meeting notice have been posted in both English and Chinese on the company website (www.sinooceanservice.com under “Investor Relations → Financial Reports / Announcements”) and on the Hong Kong Stock Exchange’s website (www.hkexnews.hk). • The 2025 Environmental, Social and Governance (ESG) Report is available exclusively online through the same platforms under “Investor Relations → ESG”. Printed copies of the ESG Report can be requested from Tricor Investor Services Limited.

2. Annual General Meeting details • Date & time: Thursday, 21 May 2026, 10:00 a.m. • Venue: Meeting Room, 3/F, Tower A, Ocean International Center, 56 Dongsihuanzhonglu, Chaoyang District, Beijing, PRC.

3. Communication arrangements • Shareholders who previously elected to receive hard copies have been sent their chosen language version. • Non-registered shareholders can request printed copies or change language preferences by returning the enclosed reply form to the Hong Kong share registrar or by emailing sinooceanservice-ecom@vistra.com. • The company encourages non-registered holders to provide functional email addresses to their intermediaries to receive electronic notifications of future corporate communications.

The board, through Company Secretary Chan Ka Man, confirmed that printed copies of the newly issued materials will be provided free of charge upon request.