In an SEC Form 4 filing after the market closed on September 6, Berkshire Hathaway reported that it added $6.4 million to its stake in Phillips 66 (NYSE: PSX) on September 1 at an average price of $77.86 per share. Berkshire Hathaway now owns 79.7 million shares of PSX, representing 15.2% of its outstanding shares. Berkshire’s PSX investment is valued at $6.3 billion at the September 6 closing price on the New York Stock Exchange of $79.11. Previously, Warren Buffett had disclosed that PSX was his investment and not that of his portfolio managers Todd Combs and Ted Weschler.
