The CEO of Google DeepMind juggles another job as the founder of a multibillion-dollar startup by starting a second work day at 10 p.m.

While many CEOs set their alarm clocks for a 5 a.m. wake-up time, Google DeepMind CEO Demis Hassabis has just hit the pillow after his second work shift of the day.

“I don’t sleep very much,” Hassabis recently said on Fortune’s Titans and Disruptors of Industry podcast with editor-in-chief Alyson Shontell. “I do try and get six [hours], but I have unusual sleeping habits I sort of manage during the day. [I] try and pack my day in the office with as many meetings as possible, back-to-back...