CropEnergies AG manufactures and distributes bioethanol, and other biofuels and related products produced from grain or other agricultural raw materials in Germany and internationally.
VERBIO Vereinigte BioEnergie AG produces and supplies biofuels in Germany and rest of Europe.
EnviTec Biogas AG provides various services to biogas plants in Europe, Asia, and North America.
De Raj Group AG, through its subsidiaries, operates in the oil and gas business in Asia and Europe.
Petro Welt Technologies AG provides oil field services to oil and gas companies in Russia and Kazakhstan.
Deutsche Rohstoff AG, together with its subsidiaries, engages in the exploration and production of crude oil, and natural gas primarily in North America, Australia, and Europe.
Tuff Group AG engages in the oil and gas, infrastructure, energy and power generation, power engineering, fabrication, and contracting fields in Singapore, Germany, and internationally.
Daldrup & Söhne Aktiengesellschaft provides drilling and environmental services to industries, suppliers, municipal/government bodies, and private customers in Germany and Central Europe.
Petro Matad Limited, together with its subsidiaries, explores for, develops, and produces oil in Mongolia.
Ichor Coal N.V., a mining company, engages in thermal coal production in South Africa and internationally.
Global Oil & Gas AG, through its subsidiaries, engages in the exploration and production of oil and gas in the United States.
Activa Resources AG, an independent oil and gas company, engages in the acquisition, development, and exploitation of oil and natural gas properties in the North America.