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Harbour Energy plc, traded as HBR on the London Stock Exchange, is an independent oil and gas company based in the United Kingdom. Founded in its current form in 2021 through the merger of Chrysaor Holdings and Premier Oil, the company focuses on the exploration, development, and production of oil and gas reserves. Harbour Energy operates primarily on the UK and Norwegian continental shelves, with additional activities in regions such as Indonesia, Vietnam, and Mexico.

ExxonMobil is an integrated oil and gas company that explores for, produces, and refines oil worldwide. In 2025, it produced 3.3 million barrels of liquids and 8.4 billion cubic feet of natural gas per day. At the end of 2025, reserves were 19.3 billion barrels of oil equivalent, 69% of which were liquids. The company is one of the world's largest refiners, with a total global refining capacity of 4.1 million barrels of oil per day, and is one of the world's largest manufacturers of commodity and specialty chemicals.