Amazon CEO and world’s richest man Jeff Bezos had his net worth increase by $6.1 billion in the first 5 trading days of 2018.

That’s $6,100,000,000.

According to Inc., the slight bump is a result of Amazon’s stock’s continued jump, rising 6.6% this year, and Bezos owns about 17% of it.

The increase has brought him to a net worth of $105.1 billion, which is more than Bill Gates was ever worth.