Peter L. Schwiering

BlueKnight Energy Partners LP engages in the operation of independent asphalt facilities. It provides integrated terminalling services for companies engaged in the production, distribution, and handling of liquid asphalt. The company was founded on February 22, 2007 and is headquartered in Tulsa, OK.

Part of Vitol Holding II SA, SemGroup Energy Partners GP LLC operates crude oil assets. The private company is based in Tulsa, OK. SemGroup Energy Partners GP was acquired by Vitol, Inc. from SemGroup LP on November 24, 2009.

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.

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.

SemCrude LP provides crude oil pipeline and freight transportation services. The company is headquartered in Cushing, OK

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

Part of Energy Transfer LP, Rose Rock Midstream Crude LP is a private company that provides crude oil transportation services. The company is based in Tulsa, OK.