Simplex Investments


Overall Ranking (7%)

The Overall Ranking is a score from 1 star (very bad) to 5 stars (excellent) generated based on the Company Reviews of current and former employees at this company, taking everything into account.

The number you see in the middle of the donut pie chart is the simple average of these scores. If you hover over the various sections of the donut, you will see the % breakdown of each score given.

The percentile score in the title is calculated across the entire Company Database and uses an adjusted score based on Bayesian Estimates (to account for companies that have few reviews). Simply put, as a company gets more reviews, the confidence of a "true score" increases so it is pulled closer to its simple average and away from the average of the entire dataset.

The Overall Ranking is generated based on the Company Reviews.

  • 5 Stars
  • 4 Stars
  • 3 Stars
  • 2 Stars
  • 1 Star

Company Details

Simplex leverages capital, trading intelligence, and superlative technological resources to constantly deliver innovation. Our unique structure and systematic development process allow new talent to contribute immediately and give experienced team members the freedom to explore. We bring technologists and traders together to create an industry leading trading engine.



230 S. La Salle Street Suite 4-100
Chicago, IL
United States

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