• Shares of Berkshire Hathaway Inc. BRK.A advanced 0.5% following news that the company has decided to acquire Energy Future Holdings for $9 billion in cash• Sparton Corporation’s SPA shares gained 3.4% following news that Ultra Electronics Holdings agreed to acquire the company for $23.50 per share in an all cash deal• Shares of AVEO Pharmaceuticals, Inc. AVEO soared 14.8% following news that the company’s drug “Tivozanib” is being considered for approval in Europe• The Advisory Board Company’s ABCO shares gained 5.4% following news that UnitedHealth Group UNH and Vista Equity Partners are considering buying out the company Want the latest recommendations from Zacks Investment Research? Today, you can download 7 Best Stocks for the Next 30 Days. Click to get this free report AVEO Pharmaceuticals, Inc. (AVEO): Free Stock Analysis Report UnitedHealth Group Incorporated (UNH): Free Stock Analysis Report The Advisory Board Company (ABCO): Free Stock Analysis Report To read this article on Zacks.com click here.