Selected Prior Investments

Optum Energy Solutions is a de novo drag-reducing agent manufacturing company providing DRAs to crude pipelines. CSL partnered with an experienced management team to found the company in 2016 and completed construction of a polymer production facility in 2018 near Oklahoma City. Optum was sold to a subsidiary of Berkshire Hathaway in January 2019. 
High Roller Sand uses advanced technology for hydraulic fracturing sand production whose delivery and service significantly increases efficiency in the production processes. The reduction of time for sand from plant to the well pads also translates to time and cost efficiencies for the customer. HRS is committed to a safe eco-friendly environment, and is situated perfectly to use low traffic flow to Northern Midland and Delaware Basisn near Kermit, TX. 
Independence Oilfield Chemicals is a geographically-diverse, multi-product line oilfield chemicals and fluids business focused on stimulation and production chemicals. CSL partnered with an experienced management team to start and build IOC. IOC is headquartered in The Woodlands, TX with operations throughout the major U.S. oil and gas basins.
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PyraMax Ceramics is a new, U.S.-based ceramic proppant manufacturing company that CSL, partnering with an experienced management team, founded and built in 2011. PyraMax is currently completing its first manufacturing facility located in Wrens, Georgia with distribution centers in West Texas and North Dakota. PyraMax was acquired by Imerys S.A. in April 2013.   
In 2010, CSL partnered with an experienced management team to form a pressure pumping company to serve the Eagle Ford shale. Management’s relationships with key vendors and customers enabled rapid entry into the market. Mission was acquired by Calfrac Well Services Ltd. in September 2013.
CSL partnered with an experienced management team to form, build and successfully exit Patriot Proppants, a resin-coated proppant manufacturing company located in North Louisiana. Patriot was sold to Unimin Corp. in 2011.