Double Eagle Energy, a Texas unicorn, preps for a rare oil IPO By: Reuters: Company News October 18, 2016 at 01:00 AM EDT Oct 18 (Reuters) - Double Eagle Energy Permian LLC is a unicorn roaming the barren landscape of West Texas. Read More >> Related Stocks: Callon Petroleum Company Chesapeake Energy Devon Energy Ep Energy Corp Extraction Oil & Gas Inc KKR & Company LP RSP Permian, Inc. Common Stock