Musk's tweets came shortly after a filing revealed Soros's family office had exited its Tesla stake. : Elon Musk scornfully compared George Soros to the X-Men supervillain Magneto after the billionaire Democratic donor disclosed he had dumped a massive trove of Tesla stock. The 92-year-old, Hungarian-born billionaire heads the Open Society Foundations and has frequently drawn the ire of conservatives for his support of progressive causes. The post had generated nearly 165,000 likes and nearly 25 million views as of the time of this article’s publication.