Hedge fund investor Starboard Value threatened to wage a board battle against Yahoo Wednesday unless "significant change" is made, including a new CEO.<br />"It appears that investors have lost all confidence in management and the board," Starboard CEO, Jeffrey C. Smith told Yahoo in a letter released publicly Wednesday morning.<br />"To be successful, dramatically different thinking is required, together with significant changes across all aspects of the business starting at the board level, and including executive leadership," Starboard said in the letter.<br />Starboard's letter is just the latest warning shot to Yahoo's board and CEO Marissa Mayer, whose efforts to boost the company's financial performance through new technology and acquisitions have sputtered.
