Mark G. Harrington

Part of National Fuel Gas Co., HarCor Energy, Inc. is an oil and gas development company. The company is based in Houston, TX. HarCor Energy was acquired by Seneca Resources Co. LLC on May 19, 1998 for $32.54 million.

Dune Energy, Inc. engages in the acquisition, development, and exploitation of crude oil and natural gas properties. The company was founded by Alan D. Gaines on November 20, 1998 and is headquartered in Dallas, TX.

Best Energy Services, Inc. involved in well servicing, workover and related activities. The company was founded by Mark G. Harrington in 2008 and was headquartered in Katy, TX.

Founded in 1901, Carl H. Pforzheimer & Co. LLC is an investment banking and securities brokerage firm located in New York City.

Rock Energy Resources, Inc., through its subsidiary, engages in the development of gold and associated mineral assets. It holds interests in the Red Arrow mine. The company was founded on April 16, 2004 and is headquartered in Houston, TX.

On April 12, 1853, the New York State legislature passed a bill chartering the United States Trust Co. of New York with the mission of serving as manager, executor and trustee of personal and corporate funds. They opened for business in New York City in August of that year. US Trust has divisions in Connecticut, New York, New Jersey, Pennsylvania, North Carolina, Florida, Texas, Oregon, California, Washington, and the District of Columbia. The firm also owns Campbell Cowperthwait, which manages growth-oriented portfolios for U.S. Trust's institutional clients.

HCO Energy Ltd. explores oil and gas. The Canadian company was founded by Mark G. Harrington, Daryl H. Connolly, Alan Scott Dawson.