Technology. Trading. Team.

We facilitate financial opportunity. We are market makers. We are a liquidity provider.
We are Simplex Trading.

Founded in Chicago in 2004, Simplex is a leading, technology-driven, proprietary trading firm. We work with the most advanced technology and software in the market, and we’ve continued to remain at the forefront of the industry by always focusing on innovation, automation and data-driven analysis. We also leverage our experience and expertise to make strategic investments and capitalize on opportunities in the venture capital markets with promising, early-stage financial and technology start-ups.


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Simplex gave me the room to make the most of my abilities and grow into a leader at the firm. We continue to do that for our employees today, empowering them to work on projects they find interesting and make a tangible difference to the firm.

Erik Swanson – CEO