Gregory M. Robbins

Memorial Production Partners LP engages in the acquisition, exploitation, development, and production of oil and natural gas properties. Its projects are located in South Texas, East Texas/Louisiana, Rockies, California, and Permian. The company was founded in April 2011 and is headquartered in Houston, TX.

Memorial Production Partners GP LLC owns and operates natural gas properties. The company is headquartered in Houston, TX.

Guggenheim Partners LLC provides financial services. It offers investments, securities, and insurance services. The company was founded in 1881 and is headquartered in Chicago, IL.

Quality Electric Steel Castings LP is a private company that manufactures steel casting products. The company is based in Houston, TX.

Memorial Resource Development LLC operated as a crude petroleum and natural gas extraction company. The company was founded on October 26, 2011 and was headquartered in Houston, TX.

Range Resources - Louisiana, Inc. engaged in acquisition, exploration and development of natural gas and oil properties. The company was founded on January, 2014 was headquartered in Houston, TX.

Grit Oil & Gas LLC engages in the development and operation of oil and gas assets. It focuses on acquisition and exploitation opportunities in select onshore basins in North America, with an initial emphasis on the Ark-La-Tex region. The company is headquartered in Houston, TX.

Grit Oil & Gas Partners II LLC is an upstream company founded in 2019, focused on acquiring, developing, and operating oil and gas assets. Grit Oil & Gas II is based in Houston, TX and follows the formation of Grit Oil & Gas in 2017, which had a successful exit in early 2019. The company is dedicated to creating value for its royalty and working interest owners.