Joseph M. Stopper

Yorktown Partners LLC (Yorktown Partners) is a private equity firm founded in 1983 by Bryan Huntington Lawrence, Peter August Leidel and Tomas Ramon Lacosta. The firm is headquartered in New York.

Armstrong Energy Inc. is engages in coal mining. The company was founded on 1st September, 2006 and is headquartered in St. Louis, MO.

Armstrong Energy, Inc. engages in the production of low chlorine, high sulfur thermal coal from the Illinois Basin, with both surface and underground mines. The firm markets its coal primarily to proximate and investment grade electric utility companies as fuel for the steam-powered generators. The company was founded in 2006 and is headquartered in St. Louis, MO.

Oakcliff Capital Partners LP (Oakcliff Capital) is an independent registered alternative asset management firm headquartered in New York City. The firm was founded by Bryan R. Lawrence in 2004. Oakcliff Capital provides investment advice solely to a privately offered investment fund which is formed as a Limited Partnership.

Solaris Midstream Holdings LLC operates as an investment holding company. It owns, operates, and designs crucial midstream assets. The company is headquartered in Houston, TX.

Synergen Met Ltd. provides thermal plasma technology solutions. It offers services to the global mining, engineering, sustainability, and renewable sectors. The company was founded by Christopher Dunks and Geoff Duckworth on December 4, 2007 and is headquartered in Brisbane, Australia.

Evergreen Natural Resources LLC operates as an oil and gas exploration and production firm. The company was founded on March 30, 2017 and is headquartered in Golden, CO.

Windy Cove Energy II LLC is an oil company that specializes in developing oil and gas recovery projects. The company is based in Houston, TX. The company operates the Chittim Ranch Waterflood in the Sacatosa field near Eagle Pass. Windy Cove Energy II was founded in 2017 by Jim Skurner, Andy Casazza, and Charles E. Fox. Charles E. Fox has been the CEO since 2017.

Triple Oak Power LLC operates in the renewable energy sector. It provides electricity infrastructure. The company was founded by Jesse Gronner and Kenneth Labeja and is headquartered in Portland, OR.