Sunflower Bank Data Breach Investigation

Turke & Strauss LLP, a leading data breach law firm, is investigating FirstSun Capital Bancorp d/b/a Sunflower Bank, N.A. regarding its recent data breach. The Sunflower Bank, N.A. data breach involved sensitive personal identifiable information belonging to an undetermined number of individuals.


Sunflower Bank, a financial institution offering a variety of services to individuals and businesses. Comprised of First National 1870, Guardian Mortgage, and Sunflower Bank, Sunflower Bank, N.A.’s financial holding company is FirstSun Capital Bancorp. With 65 personal banking locations, Sunflower Bank, N.A. primarily serves consumers in Colorado, Kansas, Texas, Arizona, and New Mexico. As of March 2023, Sunflower Bank, N.A., had total consolidated assets of $7.6 billion.


Recently, Sunflower Bank, N.A. discovered that one of its venders experienced a data breach in which the sensitive personal identifiable information of Sunflower Bank, N.A. clients may have been accessed. Through its investigation, Sunflower Bank, N.A. determined that an unauthorized actor may have accessed this sensitive information through a vulnerability in Progress Software’s MOVEit file transfer software. On July 14, 2023, Sunflower Bank, N.A. issued a formal statement on the incident. At present, the type of information exposed has not been made publicly available.

If you are a current or former client of Sunflower Bank, N.A.:

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 Sunflower Bank data breach, you may consider taking the following steps to protect your personal information.

  1. Carefully review any breach notice and retain a copy;
  2. Change passwords and security questions for online accounts;
  3. Regularly review account statements for signs of fraud or unauthorized activity;
  4. Monitor credit reports for signs of identity theft; and
  5. Contact a credit bureau(s) to request a temporary fraud alert.

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