Musk's net worth is now $229 billion, up from $140 billion at the beginning of the year. The majority of his fortune comes from his stake in Louis Vuitton.
Tesla added $205 billion to its market value on Friday, with Tesla's stock hitting a new 8-month high and jumping 6% to $250.50. The rise comes after Tesla announced its partnership with General Motors to provide Tesla's superfast charging stations for GM electric vehicles. The company also announced a similar partnership two weeks ago with Ford.