After Ellison sold his yacht, the Rising Sun, to David Geffen in 2010, Paul Allen became eligible for this superlative. The Microsoft co-founder's Octopus takes the high seas as the largest yacht among tech moguls.
The Octopus isn't the only big ticket item he purchased. Allen claims three sports teams in his repertoire: the Portland Trailblazers, the Seattle Seahawks and the Seattle Sounders.
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