Jones Energy, an oil and natural gas company backed by Metalmark Capital, priced its IPO at $15 per share and went public. Its shares now trade on the NYSE under the JONE ticker symbol. The company focuses on two distinct basins in Oklahoma and the Texas Panhandle. Metalmark owned a 61.7% stake prior to the offering dating back to a 2009 investment. JONE shares ended their first day of trading at $13.72.