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Burren Energy Plc explores and produces oil and natural gas. The company was founded by Finian Rory O'Sullivan in 1994 and is headquartered in London, the United Kingdom.

Part of Eni SpA, Burren Shakti Ltd. explores and produces oil and natural gas.

Part of Eni SpA, Eni Investments Plc is a holding British company with subsidiaries operating in the petroleum industry. The company is based in London, UK.

Eni (UK) Ltd. provides petroleum and natural gas. The company was founded on October 29, 1965 and is headquartered in London, the United Kingdom.

ENI UK Holding Plc operates as a holding company in the oil and gas industry. The company is headquartered in london, UK

Part of Eni SpA, Eni LNS Ltd. is a British company that focuses on governance, management, strategy, group identity, and energy scenarios of one of the biggest oil companies in the world. The company is based in London, UK. Eni LNS is committed to technology and its integrated approach to propose different solutions to achieve decarbonization goals. The company has been operating in the E&P sector since 2012 and is developing projects for the country. Additionally, Eni LNS contributes to starting a new industrial model of fully-integrated circular economy and launched vegetable oil production in the country in 2022.

Part of Eni SpA, ENI BTC Ltd. is an investment holding British company. The company is based in London, UK.

Part of Eni SpA, ENI Elgin/Franklin Ltd. is a British company that provides energy solutions for large and small businesses. The company is based in London, UK. ENI Elgin/Franklin celebrates 70 years and aims at the net zero target. The company is constantly committed with exploration and production activities, dealing also with gas & power and refining & marketing activities. Eni.com provides information about the business reality of Eni corporate brand, including the history, governance, values, ethical principles, and operational strategies of the group.

Part of Eni SpA, Eni Middle East Ltd. is an investment holding British company. The company is based in London, UK.

Part of Eni SpA, Eni AEP Ltd. is a British company that provides energy solutions for large and small businesses. Founded in 1935, the company is based in London, UK. Eni AEP is constantly committed to exploration and production activities, dealing also with Gas & Power and Refining & Marketing activities. Technology is at the heart of Eni's strategy and transformation and is developed with an integrated approach that can propose different solutions to achieve decarbonization goals.

Part of Eni SpA, Eni UKCS Ltd. is a British company that provides energy solutions for large and small businesses. The company is based in London, UK and is a part of one of the biggest oil companies in the world, Eni SpA. The company's website, eni.com, offers information on past and future Eni events, as well as governance, management, strategy, group identity, and energy scenarios of the Eni group company reality. Founded in 1971, the company's focus is on exploring experiences, scenarios, and data through new formats to provide a window on the present and look to the future.

Part of Hindustan Oil Exploration Co., Ltd., HOEC Bardahl India Ltd. distributes auto additives and car care products. The company is based in Mumbai, India.

Part of Eni SpA, Eni Pakistan Ltd. is a British company that engages in the exploration and production of oil & gas. The company is based in London, UK.

Part of Eni SpA, Eni Mozambique Engineering Ltd. is a British company that provides engineering and procurement services. The company is based in London, UK and was founded in 2014.

Part of Eni SpA, Eni Hydrocarbons Venezuela Ltd. is a British company that engages in the extraction of petroleum and natural gas. The company is based in London, UK. Founded in 1979, Eni Hydrocarbons Venezuela focuses on the exploration and production of hydrocarbons.

Part of Eni SpA, Eni Oil Algeria Ltd. is a British company that engages in the extraction of crude petroleum and natural gas. The company is based in London, UK. Founded in 1988, Eni Oil Algeria focuses on the exploration and production of oil and gas resources.