Jeff Rosenbaum

The Blackstone Group, Inc. provides marketing research services. It provides custom market research services for clients in industries as consumer packaged goods, financial services, healthcare and technology. The firm's clients include eBay, Harris Bank and Pfizer. The company was founded by Ashref A. Hashim in 1987 and is headquartered in Chicago, IL.

D. E. Shaw & Co. LP (DESCO) is an independent, SEC-registered investment advisor and hedge fund manager headquartered in New York City. The firm was founded in 1992 by David Elliot Shaw. DESCO serves as the managing member, manager and/or investment advisor of certain entities in the D. E. Shaw Group and provides investment advice to several affiliated hedge funds and other entities. The investor base of the funds includes institutional investors and other highly sophisticated, high-net worth participants.

Fir Tree Capital Management LP, do-business-as Fir Tree Partners (Fir Tree), is a SEC-registered investment advisor and hedge fund manager headquartered in New York City. The firm was founded by Jeffery Tannenbaum in 1994 and formerly known as Fir Tree, Inc. They are a subsidiary of FTCM GP LLC. Fir Tree manages assets on behalf of endowments, foundations, pension funds and sovereign wealth funds.

Founded by Scott A. Bommer in 1998, SAB Capital Advisors LLC is a New York City-based hedge fund manager. The firm manages the SAB family of funds