Horizon Oil Limited, together with its subsidiaries, engages in the exploration, development, and production of oil and gas properties in China and New Zealand. It holds interest in the Block 22/12 oil field in Beibu Gulf, China; and the PMP 38160 Maari/Manaia oil fields in New Zealand, as well as engages in the exploration and evaluation of hydrocarbons. The company was incorporated in 1969 and is based in Sydney, Australia.