Simplex Trading

HQ
Chicago
131 Total Employees
Year Founded: 2004
Technology. Trading. Team.
Since our founding in 2004, Simplex has continued to remain at the forefront of the industry by focusing on innovation, automation, and data-driven analysis. Simplex is a leading technology-driven market-making firm that builds proprietary software to create and capitalize on financial opportunities. We combine talented and dedicated technologists with data-driven employees to solve constantly evolving puzzles in the marketplace. Specializing in US Equity Options and Future Options, Simplex provides the liquidity essential to a competitive, fairly-functioning marketplace. We continue to reinvent ourselves and evolve to best capitalize on financial market opportunity.

Recently Posted Jobs at Simplex Trading

In-Office
Chicago, IL, USA
In-Office
Chicago, IL, USA
In-Office
Chicago, IL, USA
In-Office
Chicago, IL, USA
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Simplex Trading Offices

OnSite Workspace

Employees work from physical offices.

As a part of our commitment to fostering collaboration, innovation, and team culture, all employees in this role are expected to work onsite.

Typical time on-site: None
Company Office
HQChicago, Illinois, USA

Articles We're In

Dennis Kerlin, Simplex Trading CCO. | Photo: Simplex Trading
Ashley Bowden Ashley Bowden
Published on October 22, 2025

Simplex Trading Appoints New Chief Compliance Officer

Dennis Kerlin joins the firm with over two decades of options trading experience.

Alyssa Schroer Alyssa Schroer
Updated on March 25, 2026

110 Chicago Software Companies You Should Know

These are the top software companies that are helping make Chicago a thriving hub for tech.

Image: Shutterstock
Matthew Urwin Matthew Urwin
Updated on April 06, 2026

78 Companies in Chicago Pushing the City to New Heights

Check out this list of the top companies making Chicago a vibrant tech hub.

Image: Shutterstock

Awards

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Perks + Benefits

Compensation + Total Rewards
Offers performance bonuses

Diversity, Equity + Inclusion
Mean gender pay gap is below 10%
Mandated unconscious bias training

Family + Childcare Benefits
Hosts company-sponsored family events
Provides family medical leave
Offers generous parental leave

Healthcare Benefits
Offers dental insurance
Offers Flexible Spending Account (FSA)
Offers health insurance

Job Training + Talent Development
Provides continuing education stipend
Job training + conferences
Provides paid industry certifications

Office Perks + Extras
Provides commuter benefits
Provides free daily meals
Provides free snacks and drinks

Technology We Use

C++
C++
LANGUAGES
MariaDB
MariaDB
DATABASES
MySQL
MySQL
DATABASES
Python
Python
LANGUAGES
R
R
LANGUAGES
SQL
SQL
LANGUAGES
C
C
LANGUAGES
SystemVerilog
SystemVerilog
LANGUAGES
Boost
Boost
LIBRARIES