Rex International Holding Limited, an investment holding company, operates as an oil exploration and production company in Singapore, Norway, Germany, Hungary, Switzerland, the United States, Canada, and Zambia. It operates through Oil and Gas; and Non-Oil and Gas segments. The company engages in oil and gas exploration and production activities with concessions located in Oman, Norway, Benin, and Germany. It also provides oil exploration technology and industrial robots; Rex Virtual Drilling, a liquid hydrocarbon indicator technology that uses conventional seismic data extract to extract information about the presence of reservoir rock and liquid hydrocarbons; and unmanned aerial systems (UAS) for infrastructure inspection, including power line, offshore windmill, and gas emission inspections, as well as for search and rescue operations and public safety applications. Rex International Holding Limited was incorporated in 2013 and is based in Singapore.