BLACKSTONE CAPITAL PARTNERS IV-A LP

• 10% owner at Nalco Holding CO · on record since Mar 23, 2006
• 10% owner at UICI · on record since Apr 17, 2006
• 10% owner at TRW AUTOMOTIVE HOLDINGS CORP · on record since Jun 4, 2007
• 10% owner at VANGUARD HEALTH SYSTEMS INC · on record since Jun 21, 2011
• See footnotes 1, 2, 3 at Nalco Holding CO · on record since Nov 19, 2004