Bradley 'Brad' Katsuyama is a Canadian financial services executive. He is working as the CEO and co-founder of the IEX, the Investors Exchange. He left RBC in 2012 to co-found IEX under the premise that it would be a fairer stock trading venue than other exchanges. Through his work with IEX, Katsuyama is the focus of Flash Boys, a 2014 non-fiction book by Michael Lewis about high-frequency trading (HFT) in the financial markets.
