Warren Buffett's Berkshire Hathaway Inc. boosted his stake in Apple Inc. by 55% to 15.23 million shares as of June 30 from 9.81 million shares on March 31, according to a 13F filing with the Securities and Exchange Commission. Apple's stock tumbled 12% during the quarter. Among some other notable changes to Berkshire Hathaway's stock holdings, the stake in Wal-Mart Stores Inc. was cut to 40.2 million shares from 55.2 million shares, while the stake in Liberty Global PLC was bumped up to 30.7 million shares from 23.8 million shares. The Phillips 66 holding increased to 78.8 million shares from 75.6 million shares, while Deere & Co. was cut to 21.96 million shares from 23.28 million shares. The overall value of Berkshire's equity holdings increased 0.9% to $129.70 billion from $128.57 billion during the quarter, while the S&P 500 rose 1.9% over the same time.
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