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Atlas Copco AB, together with its subsidiaries, provides productivity solutions. The company operates through Compressor Technique, Vacuum Technique, Industrial Technique, and Power Technique segments. It offers piston compressors, oil-free tooth and scroll compressors, rotary screw compressors, oil-free blowers, oil-free centrifugal compressors, gas and process compressors, air and gas treatment equipment, and medical air solutions primarily for use in the manufacturing and process industries. The company also provides oil-sealed rotary vane, dry, and liquid ring vacuum pumps; and turbomolecular and cryogenic pumps, as well as abatement and integrated systems for the semiconductor and scientific, chemical process, food packaging, and paper handling industries. In addition, it offers pneumatic, hydraulic, and electric assembly tools, as well as control systems and associated software for safety-critical tightening; self-pierce riveting tools, dispensing equipment for adhesives and sealants, and flow drill fastening equipment; material removal tools, drills, and other pneumatic products; and machine vision solutions for customers in the automotive and general industries. Further, the company provides portable compressors, boosters, generators, lighting towers, pumps, and construction and demolition tools for civil engineering, oil and gas, construction, manufacturing, exploration drilling, and demolition industries, as well as specialty rental services. It operates in North America, South America, Europe, Africa, the Middle East, Asia, and Oceania. The company was founded in 1873 and is headquartered in Nacka, Sweden.

Alderon Iron Ore Corp. engages in the acquisition, exploration, and development of mineral properties. Its principal asset is the Kami iron ore project that comprises 283 claim units covering an area of 7,075 hectares located in Western Labrador, Canada. The company was formerly known as Alderon Resource Corp. and changed its name to Alderon Iron Ore Corp. in September 2011. Alderon Iron Ore Corp. was incorporated in 1978 and is headquartered in Vancouver, Canada.

Quantum Materials Corp. engages in the design, development, production and supply of nanomaterials, including quantum dots, tetrapod quantum dots, and other nanoparticles for a range of applications in televisions, displays and other optoelectronics, photovoltaics, solid state lighting, life sciences, security ink, battery, and sensor sectors of the market. The company was founded by Stephen Squires on January 9, 2007 and is headquartered in San Marcos, TX.

Royal Standard Minerals Inc. does not have significant operations. The company focuses on identify, acquire, or merge with assets or businesses. Previously, it was engaged in the acquisition, exploration, and development of gold and precious metal properties. Royal Standard Minerals Inc. was incorporated in 1986 and is headquartered in Toronto, Canada.

Silver Bull Resources, Inc., an exploration stage company, acquires, explores, and develops mineral properties in Mexico, Kazakhstan, and Canada. The company primarily explores for silver, lead, copper, and zinc deposits, as well as gold. Its principal project is the Sierra Mojada property comprising 20 concessions covering an area of 6,496 hectares located in Coahuila, Mexico. The company was formerly known as Metalline Mining Company and changed its name to Silver Bull Resources, Inc. in April 2011. Silver Bull Resources, Inc. was incorporated in 1993 and is based in Vancouver, Canada.