Timothy R. O'Sullivan

SemGroup LLC engages in the transportation, storage, distribution, market and other midstream services. It offers services for end-users and consumers of crude oil, natural gas, natural gas liquids and refined products. The company was founded in February 2000 and is headquartered in Oklahoma City, OK.

Part of Energy Transfer LP, SemGas LP is a company that provides natural gas gathering, processing, and storage services. The company is based in Tulsa, OK.

Koch Industries, Inc. engages in the manufacture and trade of chemical products. It operates in variety of industries such as polymers and fibers, fertilizers, electronics, automotive components, forest and consumer products, minerals, glass, process and pollution control systems, refining and biofuels, commodity trading, investments, and ranching. The company was founded by Frederick Chase Koch in 1940 and is headquartered in Wichita, KS.

Gas Processors Association operates an association that creates industry standards for processing natural gas technology and procedures. The private company is based in Tulsa, OK.

Williams Power Co. provides wholesale energy trading & marketing services. It also provides electricity generation, wholesale marketing and retailing services. The company was founded in 1908 and is located in Tulsa, OK.

Rose Rock Midstream LP owns, operates, develops and acquires a diversified portfolio of midstream energy assets. The firm is engaged in the business of crude oil gathering, transportation, storage, distribution and marketing in Colorado, Kansas, Louisiana, Montana, New Mexico, North Dakota, Oklahoma, Texas and Wyoming. It operates through four segments: Supply and logistics, Corporate and Other, Transportation and Facilities. The company was founded on August 5, 2011 and is headquartered in Tulsa, OK.

Part of Energy Transfer LP, Rose Rock Midstream GP LLC operates and manages a diversified portfolio of midstream energy assets. The company is based in Tulsa, OK.