The 39-year-old financial technology entrepreneur Vijay Shekhar Sharma, who ranks 1,394th globally with $1.7 billion, is the youngest Indian on the Forbes list. Her $1.5 billion worth's connected to her fish supplier family.
Alibaba's founder Jack Ma ranked 20th while Donald Trump ranked 766th. Forbes said, "after a two-year hiatus, Anu Aga regained her billionaire status on a jump in shares of engineering firm Thermax, in which she owns 62 per cent".
This year's list consists of 2,043 of the richest people in the world.
The software entrepreneur Azim Premji moves to the second richest Indian spot in 2018, passing Lakshmi Mittal, the global steel tycoon, according to the magazine.
Nassif Sawiris also tops the list of the richest Arab businessmen this year, rising 10 places in the ranks compared to 2017, after the list excluded 10 Saudi Arabian businessmen, including Walid bin Talal, due to the lack of authentic information about their wealth, following their alleged involvement in corruption cases.
Anu Aga is the sixth richest Indian woman on the list, ranked 1,650th with a net worth of United States dollars 1.4 billion.
Bezos seized the top ranking for the first time and has the added the distinction of becoming the first person to break the $100 billion barrier since Forbes began compiling its list in 1987.
Top of the list is the founder and boss of online giant Amazon, Jeff Bezos.
Bill Gates, Microsoft's co-founder and an occasional bridge partner of Buffett's, ranks second on the Forbes list with wealth of $90 billion.
Mukesh Ambani from Reliance is still the still richest Indian, with a fortune of $40 billion.
The Indian pharmaceutical sector has the most number of billionaires - 16.
In 2017, Trump's net worth was calculated by Forbes to be $3.5 billion, some $1 billion less than it had been on the 2016 Billionaires List.
Despite owning only 16 percent of "the everything store", which he built from scratch out of a garage in Seattle, Bezos can now call himself the richest person in the history of the planet.
There are nine others of Indian origin with assets over $2 billion from Australia, Britain, Malaysia, Indonesia, Singapore and the US.