Reuters - A building bonanza all around the massive campus of China's biggest e-commerce company Alibaba Group, ready to reap the benefits of what could be the world's biggest-ever tech IPO. <span 1.6em;"="">Founder Jack Ma was already worth four billion U.S. dollars last year. Rupert Hoogewerf estimates the IPO will push that up to nearly 14 billion U.S. dollars, catapulting Ma into China's top three richest.