Cimarex Energy Co. is an American petroleum and natural gas exploration and production company headquartered in Denver, Colorado, with operations primarily in Texas, Oklahoma, and New Mexico.
As of December 31, 2016, the company had 2.9 trillion cubic feet of natural gas equivalent of estimated proved reserves, of which 52% was natural gas and the remainder was petroleum and natural gas liquids.
In 2016, production averaged 963.4 million cubic feet of natural gas equivalent per day, 55% of which came from the Permian Basin and 44% of which came from the Rocky Mountains, particularly the Cana–Woodford in western Oklahoma.
The company was founded in 2002. The company was a corporate spin-off of Helmerich & Payne, which sought to separate its exploration and production business from its drilling business. In October 2002, shareholders of Helmerich & Payne received shares in Cimarex.
In 2005, the company acquired Magnum Hunter Resources in a $1.5 billion transaction.
In 2008, the company bought 38,000 acres in Oklahoma from Chesapeake Energy for $180 million.
In 2012, the company sold assets in Texas for $294 million.
In 2014, the company acquired assets in the Cana-Woodford, including 140 billion cubic feet equivalent of proved reserves and 50,000 net acres, in a $249 million transaction.