Southern Archipelago Ltd., an investment holding company, provides contract sterilization and polymerization services in Singapore, Malaysia, and Indonesia. It operates through Investment Holding, Sterilisation, Property, and Hospitality and Wellness segments. The Investment Holding segment invests in transferable securities, such as marketable shares, warrants, debentures, etc. The Sterilisation segment provides contract sterilisation and polymerisation services to the food packaging, medical devices, cosmetic raw materials, and consumers products. The Property segment develops properties for sale, as well as holds properties for rental and related income. The Hospitality and Wellness segment provides hotel management and wellness services. The company was formerly known as Blumont Group Ltd and changed its name to Southern Archipelago Ltd. in March 2022. The company was incorporated in 1993 and is headquartered in Singapore.