3D Oil Limited (ASX.TSO.AX) engages in the production and development of upstream oil and gas properties in Australia. It holds a 100% interest in the Gippsland Basin exploration permit Vic/P57 covering an area of 750 square kilometers located in offshore Victoria; and the Bass Basin exploration permit T41-P covering approximately 2,805 square kilometers located in Tasmania.

Abraxas Petroleum Corporation ( NasdaqCM:AXAS) is a San Antonio based crude oil and natural gas exploration and production company with operations across the Rocky Mountain, Mid-Continent, Permian Basin and onshore Gulf Coast regions of the United States and in the province of Alberta, Canada.

Abu Dhabi National Energy Company PJSC (ADX:TAQA.AE) is a global energy company with operations in power generation, water desalination, upstream oil/gas, pipelines and gas storage. In addition to supplying more than 98% of power in its domestic market, TAQA is expanding its footprint across the Middle East, The Americas and Europe. It is one of the largest companies listed on the ADX.

ACT Clean Technologies, Inc. (OTCPK:ACLH) and its wholly owned subsidiary, American Petroleum Solutions, Inc. (APS), are committed to both a safer environment through cleaner technologies, as well as more profitable methods of oil recovery and production from oil sands and other petroleum reserves. Previous users of the APS oil fluidizer technologies have included some of the largest oil and gas companies in the US, including Conoco Phillips, Exxon Mobil, Avon Petroleum, Valero Petroleum, and BP (British Petroleum), as well as the US Navy Petroleum Reserve.

ACTIVENERGY INCOME TRUST UNITS (AEU-UN.TO) is a TSX listed closed-end investment fund that invests in a diversified portfolio of energy companies with an emphasis on oil and gas as well as common shares of Canadian and U.S.-based issuers operating in the energy sector.

Adams Resources And Energy (AMEX:AE) together with its subsidiaries, engages in marketing crude oil, natural gas, and petroleum products. It purchases crude oil, and arranges sales and deliveries to refiners and other customers in Texas and Louisiana with additional operations in Michigan and New Mexico; purchases, distributes, and markets natural gas; and offers value added services by providing access to common carrier pipelines and handling daily volume balancing requirements, as well as risk management services. The company also markets branded and unbranded refined petroleum products, such as motor fuels comprising automotive gasoline, biodiesel, and conventional diesel fuel; and lubricants consisting of passenger car motor oils, and industrial oils and greases. In addition, it involves in railroad servicing industry by fueling and lubricating locomotives, as well as performing routine maintenance on the power units; and operates as a direct-to-vessel marine fuel and lube vendor primarily in Texas Gulf Coast and southern Louisiana. Further, the company transports liquid chemicals on a 'for hire' basis in the continental United States and Canada, as well as engages in the exploration and development of domestic oil and natural gas properties primarily in Texas and the south central region of the United States.

Adelaide Energy Limited (ASX:ADE.AX) is focused on oil and gas exploration in the Cooper and Otway Basins of South Australia.

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