Owner of Model X number 4.

The 4th Model X ever sold allegedly belongs to Google founder Sergey Brin. The rumour has not been confirmed, as the Silicon Valley veteran did not step forward to claim the car himself at the launch event, which he did attend. The first few models comprise the Founder’s edition reserved for main shareholders. The 1st Model X belongs to Elon Musk.
bloomberg.com via greencarreports.com