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. (Artisan Partners Funds) and Artisan Partners Global Funds plc (Artisan Partners Global Funds), 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.