Data Breach Notifications

Entity Information

  • Type of Organization: Other Commercial
  • Entity Name: Grant Thornton LLP
  • Street Address: 171 N Clark St Ste 200
  • City: Chicago
  • State, or Country if outside the US: Illinois
  • Zip Code: 60601

Submitted By

  • Name: Pasha Sternberg
  • Title: Principal
  • Firm name (if different than entity):
  • Telephone Number: 310-229-1335
  • Email Address:
  • Relationship to entity whose information was compromised: Attorney

Breach Information

  • Total number of persons affected (including residents): 6242
  • Total number of Maine residents affected: 135
  • If the number of Maine residents exceeds 1,000, have the consumer reporting agencies been notified: No
  • Date(s) Breach Occured: 04/19/2023
  • Date Breach Discovered: 08/02/2023
  • Description of the Breach:
    • External system breach (hacking)
  • Information Acquired - Name or other personal identifier in combination with: Social Security Number

Notification and Protection Services

  • Type of Notification: Written
  • Date(s) of consumer notification: 09/19/2023
  • Copy of notice to affected Maine residents: Grant Thornton - Template Notification Letter - 1Yr CM w Kroll 31 Aug - General.pdf
  • Date of any previous (within 12 months) breach notifications:
  • Were identity theft protection services offered: Yes
  • If yes, please provide the duration, the provider of the service and a brief description of the service: Kroll, 1 Year credit monitoring services