Ryan Graves was Uber's first employee and briefly held the CEO position before founder Travis Kalanick.
He is poised to become a billionaire after Uber's public debut Friday, but he is part of a new set of early tech employees that have committed to donating a portion of his IPO windfall to charity.
Charity: water has partnered with Graves, WeWork cofounder Miguel McKelvey, and Casper cofounder Neil Parikh for its latest initiative, The Pool.
The Pool uses donated shares to fund projects and...
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