https://www.celebritynetworth.com/articles/billionaire-news/jan-koum-resting-and-vesting-at-facebook/
Whatsapp Founder Jan Koum Is Showing Up To Facebook, Barely Working, Waiting To Collect $450...
Aug 21, 2018 - In April, WhatsApp's Jan Koum announced that he planned to leave Facebook. By leaving, he could have left $1 billion of shares on the table by leaving before...
jan koumshowing upbarely workingwhatsappfounder