Before it collapsed this month, FTX stood apart from many rivals in the largely unsupervised crypto industry by boasting it was the "most regulated" exchange on the planet and inviting closer scrutiny from authorities.

Now, company documents seen by Reuters reveal the strategy and tactics behind founder Sam Bankman-Fried's regulatory agenda, including the previously unreported terms of a deal announced earlier this year with IEX Group, the U.S. stock trading platform featured in Michael Lewis's book "Flash Boys” about fast, computer-driven trading.

As part of that deal, Bankman-Fried bought a 10% stake in IEX, with an option to buy it out completely in the next two and half years, according to a June 7 document. The partnership gave the 30-year-old executive the opportunity to lobby IEX’s regulator, the U.S. Securities and Exchange Commission, on crypto regulation.