More than $110 billion has been wiped off of Musk's fortune by the decline in his company's share price. Forbes estimated this week that Musk's net worth is now about $209 billion, despite the fact that his fortune peaked at $320 billion last year.
Since January, the company has fallen and closed at $214. In October of last year, it reached the trillion dollar mark.
Musk sold some of his shares in the electric car maker earlier this year and now has 155 million shares.
Even though his fortune has fallen by more than $30 billion in less than a year, he is still the wealthiest person in the world.
Even though his wealth is taking a hit, Musk is still better off than Gates and Bezos.
He sold a lot of stock in the company last year to pay for his acquisition of the company. The deal has not yet been completed and Forbes included his net worth.
In April, after he announced his plan to buy the micro-messaging service, the shares of the electric car maker fell. His wealth fell from $302 billion in April to $216 billion in June but rebounded to $279 billion in August. His net worth began to decline as he fought to kill the deal.
Musk needs billions more to complete the project. He is looking for investors to help him sell between $5 billion and $10 billion of his company's stock.
The car maker's sales in the third quarter were less than analysts had expected.
Outside normal working hours, a request for comment was not immediately responded to by the company.