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Great Lakes Graphite Inc., doing business as NovoCarbon Corporation, engages in the acquisition and exploration of mineral properties in Canada. It holds a 100% interest in the Lochaber graphite project, which includes 45 claims covering 2,649 hectares located in the Buckingham Graphite region in Outaouais/Gatineau, Québec. The company was formerly known as Shield Gold Inc. and changed its name to Great Lakes Graphite Inc. in May 2014. Great Lakes Graphite Inc. is based in Toronto, Canada.

Great Thunder Gold Corp., an exploration stage company, engages in the exploration and development of mineral properties in Canada. The company owns a 100% interest in the Valentine Mountain property that consists of 25 mineral claims covering an area of approximately 7,188 hectares and 2 overlying placer claims covering 43 hectares in British Columbia. It also holds interests in the Chubb & Bouvier property comprising 53 mineral claims covering approximately 2,200 hectares; the Urban Thunder property that consists of 20 mineral claims covering approximately 1,127 hectares; and the Nemaska Lake property comprising 4 mineral claims covering approximately 213 hectares in Quebec. The company was formerly known as Mill Bay Ventures Inc. and changed its name to Great Thunder Gold Corp. in April 2013. Great Thunder Gold Corp. is headquartered in Vancouver, Canada.

ION Geophysical Corporation provides data-driven decision-making to offshore energy, and ports, and defense industries worldwide. The company operates through two segments, E&P Technology & Services and Operations Optimization. The E&P Technology & Services segment creates digital data assets and delivers services to help E&P companies improve decision-making and reduce risk. This segment includes two synergistic groups, imaging and reservoir services, and ventures. The company's Imaging and Reservoir Services group provides data processing, imaging, and reservoir services that improve image quality and subsurface insights, helping E&P companies reduce exploration and production risk, evaluate and develop reservoirs, and increase production. Its Imaging and Reservoir Services group develops and applies proprietary processing algorithms through its imaging engine to data owned or licensed by its customers to translate raw data into subsurface images. The Operations Optimization segment develops mission-critical subscription offerings and provides engineering services that enable operational control and optimization offshore. This segment includes the company's Optimization Software & Services and Devices offerings. The company's Optimization Software & Services group provides survey design, command, and control software systems and related services for marine towed streamer and seabed operations. Its Devices offerings group develops intelligent equipment controlled by its software to optimize operations. The company sells its services and products through a direct sales force consisting of employees and international third-party sales representatives. ION Geophysical Corporation was formerly known as Input/Output, Inc. and changed its name to ION Geophysical Corporation in 2007. The company was founded in 1968 and is headquartered in Houston, Texas. On April 12, 2022, ION Geophysical Corporation along with its affiliates, filed a voluntary petition for reorganization under Chapter 11 in the U.S. Bankruptcy Court for the Southern District of Texas.