Michael Holbert

Versatel Telecom International NV is a telecommunications company in the Dutch, Belgian and German market. The company has product portfolio of fixed telephony, data, internet and mobile telephony products. It was founded in 1995. It owns an extensive DSL- and fiber optic network. It provides services from a subscription for telephony and super fast internet to innovative and fully managed data solutions

Lehman Brothers Holdings, Inc. engages in the provision of securities underwriting and investment services. The company is headquartered in New York, NY.

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.