Guru investor Carl Icahn tweeted earlier "I withdrew my demand for appraisal of my Dell shares. Based on our returns on capital, we believe we have better uses for $2 billion,". That's great news for Micheal Dell who won a bid to take the personal computer maker he founded 30 years ago private for a whopping $25 billion. At the end of the Summer Icahn held a campaign to stop Dell from taking the company private because he felt the offer wasn't enough but now it seems he is just cutting his losses, if you can consider $2 billion a lost.