Lewis Scott Kaufman

Artisan Partners LP (Artisan Partners) is a mutual fund manager and SEC-registered investment advisor headquartered in Milwaukee, Wisconsin. The firm was founded in 2009 by Andrew Ziegler and is a wholly-owned subsidiary of Artisan Partners Holdings LP, itself a subsidiary of Artisan Partners Asset Management, Inc. (NYSE: APAM). Artisan Partners serves as investment adviser to a variety of separately managed accounts, unregistered pooled investment vehicles, trustees of collective investment trusts, and to each series of Artisan Partners Funds, Inc., an open-ended management investment company.

Thornburg Investment Management, Inc. (Thornburg) is a privately-held, SEC-registered investment advisor headquartered in Santa Fe, New Mexico. The firm was founded by H. Garrett Thornburg in 1982. Thornburg provides discretionary portfolio management and investment services to a number of client types, including: Thornburg Investment Trust, registered investment companies as to which Thornburg is a sub-adviser, separate accounts for institutional clients and private clients, wrap fee accounts of sponsored program accounts, unified managed account programs, private investment funds and other non-SEC registered investment vehicles.

Citigroup Private Equity LP (Citigroup Private Equity) a Private Equity firm, a subsidiary of Citigroup Alternative Investments LLC founded in 1997. The firm is headquartered in New York.

Morgan Stanley Venture Partners (MSVP) is a venture capital firm subsidiary of Morgan Stanley Investment Management Merchant Banking, which is ultimately owned by Morgan Stanley (NYSE: MWD) founded in 1986.The firm is headquartered in New York.