Four top officers at the company have unloaded more than $100 million in stock since last month, reported ABC News. They include James Murdoch, the estranged son of right-wing media magnate Rupert Murdoch, and Elon Musk’s brother Kimbal Musk, the latter of whom shed $27 million, according to an SEC filing.

This is the story of two immensely talented sons of Africa who each migrated to America and thrived. One you’ve heard of: Elon Musk. The other, Valentino Achak Deng, was a “lost boy” from Sudan who survived massacres, lions and crocodiles and moved to Atlanta as a refugee. Musk and Deng have since gone in opposite directions.