Brad Katsuyama, 38
Katsuyama became an instant hero to average Joe investors when Michael Lewis’s book Flash Boys portrayed his IEX Group—with its alternative trading platform that adds a split-second speed bump to stock orders—as the antidote to front-running by high-frequency traders. His vision became reality this summer when he won SEC approval and officially launched IEX as a national stock exchange alongside the likes of Nasdaq and NYSE. Overall, despite backlash from Wall Street traditionalists, IEX has raised more than $100 million in funding.
IEX handles 1.6% of all Trades in the U.S.
That’s 10% of what Nasdaq manages.