Looks like Warren Buffett's got a secret purchase By: CNBC.com News August 14, 2015 at 17:30 PM EDT Perhaps the most interesting aspect of the holdings disclosed by Warren Buffett's Berkshire Hathaway is what wasn't revealed. Read More >> Related Stocks: Axalta Coating Systems Ltd Berkshire Hathaway International Business Machines Natl Oilwell Varco Phillips 66 Via Renewables Inc Cl A Viacom