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CARBO Ceramics Inc., a technology company, provides products and services to the oil and gas, industrial, and environmental markets worldwide. It operates through two segments, Oilfield and Industrial Technologies and Services, and Environmental Technologies and Services. The Oilfield and Industrial Technologies and Services segment manufactures and sells oilfield ceramic technology products, base ceramic proppants, and frac sand proppants to pressure pumping companies, and oil and gas operators for use in the hydraulic fracturing of natural gas and oil wells. It also provides technology to design, build, and optimize the Frac; sells fracture stimulation software under the FracPro brand; and offers fracture design and consulting services to oil and natural gas exploration and production companies under the StrataGen brand name. The Environmental Technologies and Services segment provides spill prevention, containment, and countermeasure systems for the oil and gas industry. CARBO Ceramics Inc. was founded in 1987 and is headquartered in Houston, Texas.

Lightbridge Corporation, together with its subsidiaries, engages in developing nuclear fuel technology. It develops and commercializes metallic nuclear fuels. The company was formerly known as Thorium Power, Ltd. and changed its name to Lightbridge Corporation in September 2009. Lightbridge Corporation is headquartered in Reston, Virginia.

NanoFlex Power Corporation researches, develops, commercializes, and licenses photovoltaic technologies that enable thin film solar products. The company has worldwide license and right to sublicense intellectual property resulting from its sponsored research programs, which have resulted in a portfolio of issued and pending U.S. patents and their foreign counterparts. Its patented and patent-pending technologies include Gallium Arsenide based solar thin films; and organic photovoltaic materials, architectures, and fabrication processes for ultra-thin solar films offering aesthetics, such as semi-transparency and tinting, and highly flexible form factors. The company's technologies are targeted at various applications comprising portable and off-grid power generation, building applied photovoltaics, building integrated photovoltaics, space vehicles and unmanned aerial vehicles, semi-transparent solar power generating glazing or windows, ultra-thin solar films for automobiles or other consumer, and Internet of Things application, including sensors. NanoFlex Power Corporation was founded in 1994 and is based in Scottsdale, Arizona.

Recon Technology, Ltd. provides hardware, software, and on-site services to companies in the petroleum mining and extraction industry in the People's Republic of China. The company offers equipment, tools, and other components and parts related to oilfield production and other energy industries; and develops and sells industrial automation control and information solutions. It also provides equipment for oil and gas production and transportation, including heating furnaces and burner, as well as improvement techniques comprising packers of fracturing; production packers; sand prevention in oil and water wells; water locating and plugging techniques; fissure shaper; fracture acidizing techniques; and electronic broken-down services to resolve block-up and freezing problems. In addition, the company offers automation systems and services, including pumping unit controller that monitors the pumping units and collects data; RTU to monitor natural gas wells and collect gas well pressure data; wireless dynamometers and wireless pressure gauges; electric multi-way valves for oilfield metering station flow control; and natural gas flow computer systems. Further, it provides Recon SCADA oilfield monitor and data acquisition system for supervision and data collection; EPC service of pipeline SCADA system for pipeline monitoring and data acquisition; EPC service of oil and gas wells SCADA system for monitoring and data acquisition of oil wells and natural gas wells; EPC service of oilfield video surveillance and control system to control the oil and gas wellhead and measurement station areas; and technique service for digital oilfield transformation. Additionally, the company offers oilfield waste water treatment solutions and related chemicals; oily sludge disposal solutions; and gas station operation and management solution. Recon Technology, Ltd. was incorporated in 2007 and is headquartered in Beijing, the People's Republic of China.

Viking Energy Group, Inc., an exploration and production company, engages in the acquisition and development of oil and natural gas properties in North America. The company operates through two segments, Oil and Gas Production and Power Generation. It manufactures and supplies power generation products, services, and custom energy solutions; clean-tech energy systems, including combined heat and power, tier 4 final diesel, and natural gas industrial engines, solar, wind, and storage; designs and assembles electrical control equipment, such as switch gear, synchronization and paralleling gear, distribution, bi-fuel, and complete power generation production controls; and clean energy and carbon-capture systems to generate clean electricity. The company also engages in developing, patent pending, electric transmission, and distribution of open conductor detection systems to detect a break in a transmission line, distribution line, or coupling failure. The company owns oil and gas leases in Texas, Louisiana, Mississippi, and Kansas. The company was formerly known as Viking Investments Group, Inc. and changed its name to Viking Energy Group, Inc. in March 2017. Viking Energy Group, Inc. was incorporated in 1989 and is headquartered in Houston, Texas. Viking Energy Group, Inc. operates as a subsidiary of Camber Energy, Inc.