Stocks in the news: Cisco, Bank of America, Comcast, Penske

Some of the companies making headlines today:

Cisco Systems (CSCO) says it has agreed to buy Tandberg ASA, a Norwegian company that makes hardware for video conferences, for $3 billion, which amounts to 153.50 kroner ($26.50) per share of Tandberg's stock, an 11 percent premium on Wednesday's closing share price.

Bank of America (BAC) president and chief executive Ken Lewis will resign by the end of the year, the Charlotte, N.C., banking giant announced after stock markets closed Wednesday. The bank did not name a successor.