Zenith Energy Ltd. operates oil and gas fields and a land drilling rig with assets in Congo, Tunisia, and Italy. Petroleos Patagonia operate as a subsidiary. Common shares are listed on the LON (ZEN) and and OSL (ZENA-ME) exchanges. Canoel International Energy was incorporated in 2007 and listed publicly in 2008. Canoel was renamed Zenith in 2014 and completed a public offering in 2017. In May 2021, the company acquired Ecumed Petroleum from Candax Energy.