Berkshire Hathaway Inc (NYSE: BRK-A) (NYSE: BRK-B) chairman and CEO Warren Buffett on Thursday adamantly denied that he or his colleagues at the investment firm had advanced knowledge of Microsoft Corp's (NASDAQ: MSFT) plan to buy Activision Blizzard Inc (NASDAQ: ATVI). What Happened: The veteran value investor told the New York Post that he wanted to clear up “misinformation” about the $1 billion transaction, in which his investment firm bought shares in Activision Blizzard in the fourth quarter of 2022.