Christopher Shebby

Atlas Resources LLC engages in the development and production of natural oil and gas. The company was founded in October 2011 and is headquartered in Pittsburgh, PA.

Stifel, Nicolaus & Co., Inc. (Stifel) is a dual-registered broker-dealer and investment adviser headquartered in St. Louis, Missouri. Founded in 1890, the firm is a subsidiary of Stifel Financial Corp. (NYSE: SF), a financial service holding company. Stifel provides full-service brokerage and investment advisory services to individuals and their families, institutions and businesses, and financial advisors.

Energy Recovery Fund is a private company that specializes in making robotic systems and providing engineering services to offshore oil and gas industries. The company is based in Chevy Chase, MD.

FBR & Co. provides investment banking, merger and acquisition advisory, institutional brokerage and research services through its subsidiaries. The company operates through two segments: Capital Markets and Principal Investing. The Capital Markets segment includes investment banking, institutional brokerage and research. It also provides investment banking services, including capital raising and financial advisory services for its corporate issuer clients, and institutional brokerage services including sales, trading, research, and securities lending services to its institutional investor clients. The Principal Investing segment activities consist primarily of investments in merchant banking and other equity investments, investment funds and corporate debt investments. The company was founded in June 2006 and is headquartered in Arlington, VA.

DGOC Series 28 LP is a developer and producer of natural gas, crude oil, and natural gas liquids, which operates wells located in Pennsylvania. The company was founded on July 6, 2017 and is headquartered in Fort Worth, TX.

DGOC Series 18B LP engages in the development and producing of natural gas, crude oil, and natural gas liquids through Atlas Resources, LLC, which is an indirect subsidiary of Titan Energy, LLC. The company was founded on July 6, 2017 and is headquartered in Fort Worth, TX.

DGOC SERIES 18(C) LP operates a limited partnership with the purpose of holding Atlas Public #18C''s in Pennsylvania and Tennessee. The company was founded on July 6, 2017 and is headquartered in Fort Worth, Texas.