founder of Lowercase Capital, once considered himself a friend to Kalanick. Sacca’s $300,000 early investment in Uber also gave him a sizeable portion of the company. But when Sacca began attempting to buy up shares of Uber from other early investors—a practice known as “secondary share purchasing”—Kalanick turned on him. The CEO stopped allowing Sacca to attend board meetings as an observer; the two rarely spoke afterwards.