Jump: inside the secretive e-trading giant

Execs at the Chicago prop firm wish the whole world was a Clob, but as bilateral volumes rise, they’ve decided to go with the flow

Secretive, unassuming, huge and wildly successful. That’s how outsiders describe Jump Trading, one of the world’s biggest – and most mysterious – proprietary traders. 

For the two decades since its birth, Jump has remained largely hidden from public view. The company’s co-founders, Bill DiSomma and Paul Gurinas, shun media interviews. Its website is pretty much empty.

Even those in the prop trading community in Chicago have limited knowledge of how the firm works. “I really have no idea how

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