Berkshire Hathaway and Wesco Financial Corporation announced Monday that they entered into a definitive merger agreement, whereby Berkshire Hathaway will acquire the remaining 19.9 percent of the shares of Wesco’s common stock that it does not presently own in exchange for cash or shares of Berkshire Hathaway Class B common stock, at the election of each shareholder. Based on the estimated shareholders’ equity of Wesco as of January 31, 2011, the transaction values the 19.9 percent of Wesco not owned by Berkshire Hathaway at approximately $547.6 million.