Charles Leykum

Soros Fund Management LLC (SFM) is a privately-held investment management firm now structured as a family office, but which was once a hedge fund manager. The firm was founded in 1969 and is headquartered in New York City. SFM serves as principal investment adviser to a group of funds managed for the benefit of Soros family cl fsients.

Goldman Sachs & Co. LLC (GS&Co.) is a securities brokerage firm headquartered in New York City. Founded in 1927, the firm is a subsidiary of The Goldman Sachs Group, Inc. (NYSE: GS). GS&Co. provides services to help hedge funds manage risk, monitor portfolios, maintain liquidity and build their businesses. They offer clients access to global equity and derivatives markets, as well as foreign exchange, commodities, European Lefts, rates and credit across the Americas, Europe and Asia. The firm proactively monitors capital markets, searching for pockets of liquidity and news that may require changes to those strategies. Integration with the Goldman Sachs network gives clients access to the firm's sectored block trades and their insights into price discovery. Their electronic trading program provides clients with tools to manage their trades from pre-trade analytics to post-trade analysis.

CSL Capital Management LLC (CSL Capital) is a private equity firm founded by Charles Leykum in 2008. The firm is headquartered in Houston, Texas.

Pyramax Ceramics LLC produces ceramic granules used in the oil and gas industry. It also manufactures light weight kaolin-clay ceramic proppants, used in the hydraulic fracturing process relating to drilling for oil and natural gas. The company was founded by Michael Burgess and is headquartered in Greenwich, CT.

United Oilfield Services Sp zoo provides seismic, drilling and well completion services related to the exploration and provision of natural gas and oil deposits as well as geothermal sources. It offers drilling services and snubbing services. The company was founded by Michael Dennis McKee and Charlie Syl Leykum in 2011 and is headquartered in Warsaw, Poland.

Mission Well Services LLC provides hydraulic fracturing and coiled tubing services to oil and gas exploration industries. The company is headquartered in Greenwich, CT.

Part of Innospec, Inc., Independence Oilfield Chemicals LLC specializes in stimulation of chemical and cementing solutions. The private company is based in The Woodlands, TX. The company was founded by James Michael Brown. Independence Oilfield Chemicals was acquired by Innospec Oil Field Chemicals LLC from CSL Capital Management LLC on October 27, 2014 for $228 million.