Economy of the United States Corporation, Apple Inc., Verizon, JPMorgan Chase, and Cardinal Health. In 2013, eight of the world's ten largest companies by market capitalization were American: Apple Inc., ExxonMobil, Berkshire Hathaway, Walmart, General Electric, Microsoft, IBM, and Chevron Corporation. According to Fortune Global 500 2011, the ten largest U.S. employers were Walmart, U.S. Postal Service, IBM, UPS, McDonald's, Target Corporation, Kroger, The Home Depot, General Electric, and Sears Holdings. Apple, Google, IBM, McDonald's, and Microsoft are the world's five most valuable brands in an index published by Millward Brown. A 2012 Deloitte report published in "STORES" magazine indicated that of the world's top
Google Analytics in 2006. In October 2006, Google announced that it had acquired the video-sharing site YouTube for $1.65 billion in Google stock, and the deal was finalized on November 13, 2006. On April 13, 2007, Google reached an agreement to acquire DoubleClick for $3.1 billion, transferring to Google valuable relationships that DoubleClick had with Web publishers and advertising agencies. The deal was approved despite anti-trust concerns raised by competitors Microsoft and AT&T. In addition to the many companies Google has purchased, the firm has partnered with other organizations for research, advertising, and other activities. In 2005, Google partnered with NASA