Elon Musk is richest with $219 Billion net worth. Elon Musk, who was recently appointed to Twitter’s board after emerging as the biggest single shareholder in microblogging site “Twitter”, topped the Forbes list for the first time with a net worth of $290 billion. Elon Musk owns more than 73.4 million shares in the social media platform valued at about $3 Billion, Forbes said, Mr Musk added $68 Billion to his net worth over the past year after a 33 percent jump in the share price of his electric vehicle maker, Telsa. Elon Musk is clearly in uncharted territory when it comes to wealth. He is the richest person ever, according to Forbes.