Sirius Petroleum plc is an investment company, which is focused on oil and gas exploration and development (E&P) opportunities in Nigeria. The Company's principal activity is to acquire and develop offshore proven oil discoveries (marginal fields) in Nigeria. The Company is engaged in oil extraction and related activities. The Company's subsidiaries include Sirius Taglient Petro Limited, Sirius Trading Nigeria Limited, Sirius Ororo OML95 Limited, SRS Petroleum Nigeria Limited and Sirius 2012 Limited. The Company's subsidiaries are engaged in E&P management services, trading of oil and exploration for mineral resources.