Well, that wasn't long.Just one quarter after Warren Buffett's Berkshire Hathaway bought more than $266 million worth of Ulta Beauty (ULTA -4.60%) stock, the conglomerate dumped nearly all of that stake in the third quarter this year, selling more than 95% of its shares.The move was surprising for those who follow Buffett. The Oracle of Omaha is known as a long-term investor, having said, "Our favorite holding period is forever" when the right conditions are met. He has held some stocks for decades, includi ...