Andrew P. Calerich

American Oil & Gas, Inc. engaged in the acquisition, exploration and development of crude oil and natural gas reserves and production in the Western United States. The company was founded on February 15, 2000 and was headquartered in Denver, CO.

Tipperary Corp. provides exploration services. It explores for coal and natural gas. The company has operations in Queensland, Australia, Colorado and Nebraska. The company was founded in 1967 and is headquartered in Denver, CO.

PYR Energy Corp. produces crude oil, petroleum & natural gas extraction. Its exploration and development activity is conducted in Rocky Mountains, Texas and Gulf Coast regions of United States and Canada. It focuses the application of seismic imaging and computer aided exploration technologies. It was founded by Mr. Singdahlsen in March 1996 & is headquartered in Denver, CO.

Earthstone Energy, Inc. is a growth-oriented independent oil and gas company. The firm is engaged in the acquisition and development of oil and gas reserves through activities that include drilling and development of undeveloped leases, as well as asset and corporate acquisitions and mergers. It also focuses on the Midland Basin in West Texas, the Eagle Ford Trend in South Texas and the Delaware Basin in New Mexico. The company was founded on July 7, 1969 and is headquartered in The Woodlands, TX.

American Eagle Energy Corp. explores for oil and gas. The firm engaged in the exploration activities within the Spyglass Property, the Benrude Property and within the Hardy Property. The company was founded in 2003 and is headquartered in Littleton, CO.

Thunder Basin Resources LLC engages in oil and gas exploration. The company was founded in 2017 and is headquartered in Denver, CO.