Cinco Resources, a PE-backed E&P company, has withdrawn its plans to go public. Based in Dallas, Cinco is an oil and natural gas platform focused on basins in South Texas, Wyoming and eastern Oklahoma. Yorktown Partners, an energy-focused investor in New York, helped form the company in 2002 alongside CEO Jon L. Glass. The firm provided two additional growth financings to the company in 2009 and 2011, bringing its total stake to 84.7%.