At Friday’s close, these were the five highest market cap U.S. companies:

• Exxon (XOM), $315.38 billion.
• Microsoft (MSFT): $256.71 billion.
• Apple (AAPL): $205.48 billion.
• Wal-Mart (WMT): $205.09 billion.
• Berkshire Hathaway (BRKA): $202.20 billion.

http://blogs.barrons.com/techtraderdaily/2010/03/13/apple-now-3/

Apple, Wal-mart, and the “Market Capitalization Bigger Than” Thing

http://paul.kedrosky.com/archives/2010/03/apple_wal-mart.html