Jonathan J. Ginns

Optimal Group, Inc. manufactured consumer robotic, toy and entertainment products and provided credit card processing services. The company was founded in 1996 and was headquartered in Montreal, Canada.

Mariner Energy, Inc. explored and produces oil and natural gas. It operated in four principal areas: Permian Basin, Gulf Coast, Gulf of Mexico Deepwater and Gulf of Mexico Shelf. The company was founded in August 1983 and is headquartered in Houston, TX.

World Marine LLC provides marine and fabrication services. It offers new construction, heavy fabrication, repairs, upgrades, and conversions of all types of vessels and offshore rigs. The company is headquartered in Mobile, AL.

ACON Investments LLC (ACON Investments) is a private equity firm founded in 1996 by Kenneth R. Brotman, Bernard W. Aronson and Jonathan J. Ginns. The firm is headquartered in Washington D.C., the United States with additional offices in Dallas, Los Angeles, New York, Bogota, Madrid, Mexico City and Sao Paulo.

Chroma Oil & Gas, LP operated as a private oil and gas company. It offered acquisition, exploitation and development of properties primarily in East and South Texas and South Louisiana. The company was headquartered in Houston, TX.

Milagro Exploration LLC engages in the acquisition, development and production of oil and gas in mid continent, the Southeast, the Texas Gulf Coast, and South Texas. The company was founded in 2005 and is headquartered in Houston, TX.

Northern Tier Energy LLC engages in oil and gas refining, retail, and pipeline operations. Its products include gasoline, diesel, jet fuel, and asphalt which are then marketed to resellers and consumers. The company was founded on June 23, 2010 and is headquartered in Phoenix, AZ.

Northern Tier Energy LP engages in refining, retail, and logistics operations. The company was founded by Mario E. Rodriguez and Hank Kuchta on October 21, 2011 and is headquartered in Tempe, AZ.

Milagro Oil & Gas, Inc. engages in the acquisition, exploration, exploitation, development, and production of oil and natural gas reserves. The company was founded by Thomas C. Langford, John L. Eells, and Robert L. Cavnar on November 1, 2007 and is headquartered in Austin, TX.