John Wren

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.

Founded in 2000 by George F.J. Gosbee, Tristone Capital, Inc. is a financial advisory firm and broker/dealer located in Denver, Colorado. They also have offices in Houston, Calgary, Buenos Aires and London. Tristone focuses on the global energy markets. The firm provides services related to investment banking, acquisitions, divestitures and global equity capital markets. Their clients include exploration and production companies, oilfield services companies, midstream companies, government entities, royalty trusts and institutional investors around the world. Tristone's research department combines financial analysis, technical expertise and industry experience to provide clients with information regarding the North American energy sector. They have performed detailed micro analysis on oil and gas producers ranging from large integrated producers to the micro-cap junior producer.

Founded in 2001, Macquarie Capital (USA), Inc. is a registered broker/dealer located in New York City. The firm is a subsidiary of Macquarie Bank Ltd. (ASX: MBL). They provide coverage of the following industries: resources, healthcare, security/defense, transportation, financial services, retail/consumer products, TMET (telecommunications, media, entertainment and technology), oil & gas, diversified manufacturing/distribution and infrastructure/utilities. Macquarie Capital (USA), Inc. is a member of FINRA.

Extraction Oil & Gas, Inc. is an energy company, which engages in the exploration, development, and production of oil, natural gas, and natural gas liquids. It focuses on extraction activities in Denver-Julesburg Basin of Colorado, targeting development of the Codell and Niobrara formations. The company was founded by Mark A. Erickson, Matthew Owens and Jesse Silva in November 2012 and is headquartered in Denver, CO.