Microsoft share prices have already climbed almost 48% this year, adding up to Gates' growing wealth which he uses for philanthropic, investments in non-profits and educational upstarts.
Gates' was able to regain the title because Microsoft shares are up nearly 48 percent this year, helping bolster the tech company's value.
The contract in question, which is called the Joint Enterprise Defense Infrastructure -that's JEDI, to you and I - will see Microsoft provide all of the cloud storage for the Department of Defense for a 10 year period.
Interestingly, AWS lost out on a golden-ticket $10 Bn Pentagon contract to Microsoft, which helped the Redmond giant climb up in terms of market cap as well.
Gates, 64, had briefly topped Bezos, 55, on an intraday basis last month after Amazon posted its first profit drop in two years, but shares of the world's biggest online retailer pared the decline.
Germany makes measles vaccination compulsory for children
So far this year, there are 11 confirmed cases of measles in Georgia - more cases than in the previous decade combined. Cases of the disease have also been on the rise across Europe.
Zander Lombard holds slender lead in Sun City
Oosthuizen began the day two shots off the lead and briefly moved to outright leader prior to Lombard's recovery. He made a double-bogey seven, while both Lombard and Oosthuizen made birdies to be two ahead of the Belgian.
Odorizzi Decides To Stay With Twins
The 30-year-old Smith went 6-0 with a 2.76 ERA and a career-best 34 saves for the San Francisco Giants this past season. Smith is Atlanta's fourth free-agent signing of the offseason but the first to change teams.
Amazon's stock is down 2 percent, according to Bloomberg.
The Amazon founder also had an infamous divorce that was finalised earlier this year, which saw his then wife, MacKenzie Bezos, walk away with $36 billion from Mr Bezos' stocks.
Jeff Bezos recently divorced his wife Mackenzie.
Bezos ended Gates' 24-year run as the richest man in 2018 with a net worth of $160 billion. My approach to philanthropy will continue to be thoughtful. But I won't wait. He has donated more than US$35 billion to the Bill & Melinda Gates Foundation since 1994.
Recently, Gates spoke about a proposed wealth tax being campaigned by some Democratic political candidates, including Sen.
As of today, that would be US$10 billion. In a statement, she said: "I have a disproportionate amount of money to share".