# Simplex Trading

> Simplex Trading is a Chicago proprietary trading firm that builds its own technology to trade and provide liquidity in U.S. options, equities, and futures. Its wider business network includes an investment in Matrix Executions and the separately constituted, commonly owned Simplex Ventures.

- **Founded:** 2004
- **Headquarters:** Chicago, United States
- **Founders:** Douglas Anderson (Co-founder of the original Simplex business), Mathew Gray (Co-founder of the original Simplex business)
- **Products:** Proprietary market making, Internal trading technology, Wholesale options initiative with Matrix Executions, Simplex Ventures
- **Notable:** Built In Best Places to Work recognition for three consecutive years, 2024-2026., Expanded into wholesale options through the Matrix Executions relationship.

## Products & services

- **Proprietary market making** — Own-account liquidity provision and trading in U.S. exchange-traded derivatives and equities.
- **Internal trading technology** — Proprietary algorithms, high-speed data analysis, and execution software, including C++ on Linux.
- **Wholesale options initiative with Matrix Executions** — A partnership and investment described publicly in 2021 and 2022 to reach retail broker order flow.
- **Simplex Ventures** — Early-stage investing through a separate legal entity under common ownership with Simplex Trading.

## Achievements

- Built In Best Places to Work recognition for three consecutive years, 2024-2026.
- Expanded into wholesale options through the Matrix Executions relationship.

## Latest updates

- **2026-03** — RSM signed the audit of the December 31, 2025 statement of financial condition.
- **2026-01** — Company announced a third consecutive year of Built In workplace recognition; its Insights entry has an apparent year typo in the displayed date.
- **2025-10** — Dennis Kerlin appointed Chief Compliance Officer.
- **2024-08** — Nancy Laethem Stern appointed Managing Director, General Counsel.

## Links

- Website: https://simplextrading.com/
- LinkedIn: https://www.linkedin.com/company/simplex-trading/
- Twitter/X: https://twitter.com/simplexinvest
- Instagram: https://www.instagram.com/simplexchicago/
- Facebook: https://facebook.com/simplexinvestments

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Profile page: https://yespress.io/simplex-trading
Published by YesPress — https://yespress.io
Last updated: 2026-10-25