Southern Archipelago Ltd., an investment holding company, provides contract sterilisation and polymerisation services in Singapore, Malaysia, and Indonesia. The company operates through Investment Holding; Sterilisation; Property; and Hospitality and Wellness segments. The Sterilisation segment provides contract sterilisation, decontamination, and polymerisation services to the food packaging, medical devices, cosmetic, pharmacy, pharmacy packaging, and other consumer products. The Investment Holding segment invests in transferable securities, such as marketable shares, warrants, and debentures. 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. Southern Archipelago Ltd. was incorporated in 1993 and is headquartered in Singapore.