Composite image of Elon Musk and Bill Gates
Bill Gates thought Elon Musk became 'super mean' after finding out Gates shorted Tesla stock
  • Elon Musk shot down Bill Gates' attempts to talk about giving to charity after Gates shorted Tesla stock.
  • "He was super mean to me, but he's super mean to so many people, so you can't take it too personally," Gates said.
  • Their exchange was detailed in an excerpt from Walter Isaacson's forthcoming biography of Musk.

An excerpt of an upcoming biography of Elon Musk shed light on what Musk and Bill Gates thought of each other following a negative exchange over Gates taking a short position against Musk's Tesla.