The 23 richest self-made billionaires are worth $1 trillion - here they all are

Not all billion-dollar fortunes are created equal. Some of the world's richest inherit their vast sums of wealth from their family - others build from scratch.

Of $4, 23 fall into the latter camp. Together, their combined net worth eclipses $1 trillion.

That's according to the $4, which recently relaunched and expanded online to include 500 billionaires across the globe.

For the ranking, Business Insider culled data from the Bloomberg Billionaires Index as of March 1, when the index relaunched in its expanded format. The index updates daily to provide up-to-the-minute data on the world's wealthiest men and women. You can read the full methodology $4.

These business magnates faced adversity, overturned industries, and bucked trends to build some of today's most powerful companies and recognizable brands across technology, real estate, and retail.

From the founders of Microsoft and Google to China's tech barons to "The Oracle of Omaha" himself, here are the world's wealthiest self-made billionaires.

Note that Bloomberg does not report the net worth of its founder and owner Michael Bloomberg, who does not appear on this ranking, though $4 peg his fortune at roughly $4.