SEATTLE (Reuters) - Microsoft Corp co-founder Paul Allen has constructed a $15 billion portfolio of tech, sports, real estate and energy investments, while giving to a wide range of philanthropic causes. Not all his bets have been a success. The following is a list of his most notable hits and misses over the past 30 years. TECHNOLOGY Microsoft - Co-founders Allen and Bill Gates started off with a 64/36 partnership. Allen's share was worth about $30 billion at the company's zenith in 1999-2000. He now has only a small stake. ... More...