Cimarex Energy Co. was a company engaged in hydrocarbon exploration, particularly shale oil and gas drilling.

It was organized in Delaware and headquartered in Denver, Colorado, with operations primarily in Texas, Oklahoma, and New Mexico.

[2] In September 2002, shareholders of Helmerich & Payne received shares in Cimarex.

[6] In 2014, Cimarex 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.

[9] In October 2021, the company was acquired by Cabot Oil & Gas, forming Coterra.