UPDATE 1-Buffett's Berkshire Hathaway buys stake in Verizon, adds to Wal-Mart By: Reuters: Company News May 15, 2014 at 18:00 PM EDT (Adds analyst comment on Verizon, details on Wal-Mart, Buffett portfolio) Read More >> Related Stocks: American Express Berkshire Hathaway Coca-Cola Company DIRECTV DaVita HealthCare Partner General Motors International Business Machines Verizon Communications Wal-Mart Stores, Inc. Wells Fargo