Andrew Patrick Ziccardi

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.

TIAA-CREF Investment Management LLC (TCIM) is a registered investment advisor headquartered in New York City. The firm was founded in 1997 and is a wholly-owned subsidiary of TIAA-CREF Asset Management LLC, ultimately owned by TIAA Board of Governors. TCIM provides investment management and certain administrative services necessary for the operation of the College Retirement Equities Fund (CREF), a diversified open-end registered investment management company that consists of eight accounts, that issues individual, group and tax-deferred variable annuity contracts.