Chicago Trading Company Data Breach Investigation

Turke & Strauss LLP, a leading data breach law firm, is investigating Chicago Trading Company regarding its recent data breach. The Chicago Trading Company data breach involved sensitive personal identifiable information belonging to an undetermined number of individuals.


Chicago Trading Company is a proprietary derivatives trading firm based in Chicago, Illinois. As a financial services company, Chicago Trading Company trades across a variety of asset classes, including equities, interest rates, and commodities. Founded in 1995, Chicago Trading Company attributes its growth to market experience, risk management capabilities, and financial engineering expertise.2 Today, Chicago Trading Company is recognized as a leading provider of liquidity and pricing on numerous derivatives exchanges.2 Employing over 500 individuals, Chicago Trading Company has locations in Chicago, London, Boulder, and New York.


On October 27, 2023, Chicago Trading Company discovered that it had experienced a data breach in which sensitive personal identifiable information in its systems may have been accessed and acquired. Through its investigation, Chicago Trading Company confirmed that an unauthorized actor may have accessed and acquired this sensitive personal information and threatened to post it on the dark web. Recently, Chicago Trading Company began notifying individuals whose information may have been impacted. The type of information exposed includes:

  • Name
  • Social Security number
  • Date of birth
  • Address
  • Passport information
  • Driver’s license information

If you received a breach notification letter from Chicago Trading Company:

We would like to speak with you about your rights and potential legal remedies in response to this data breach. Please fill out the form, below, or contact us at (608) 237-1775 or

If you were impacted by the Chicago Trading Company data breach, you may consider taking the following steps to protect your personal information.

  1. Carefully review the breach notice and retain a copy;
  2. Enroll in any free credit monitoring services provided by Chicago Trading Company;
  3. Change passwords and security questions for online accounts;
  4. Regularly review account statements for signs of fraud or unauthorized activity;
  5. Monitor credit reports for signs of identity theft; and
  6. Contact a credit bureau(s) to request a temporary fraud alert.

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