Wall Street JournalBuffett's Berkshire Keeps Buying More of AppleWall Street JournalWarren Buffett's Berkshire Hathaway Inc. BRK.B 0.32% continued to load up on technology giant Apple Inc. AAPL 0.42% in the second quarter. Berkshire increased its holdings of Apple stock by 12.4 million shares in the quarter, taking its stake to $46.6 ...and more »