Hamilton Tax and Accounting Data Breach Investigation

Turke & Strauss LLP, a leading data breach law firm, is investigating Hamilton Investment Group LLC d/b/a Hamilton Tax and Accounting (“Hamilton”) regarding its recent data breach. The Hamilton data breach involved sensitive personal identifiable information belonging to over 1,500 individuals.


Hamilton is a tax and accounting firm based in Illinois. Founded in 2012, Hamilton provides all-inclusive financial services, including tax strategy and preparation, specializing in real estate professionals, cryptocurrency, retirement accounts, and small businesses.2 Additionally, Hamilton’s services include cost segregation analysis, bookkeeping, business consulting, business entity selection, retirement planning, financial analysis, payroll services, and more. Headquartered in Grayslake, Illinois, Hamilton has one location and employs over 3 individuals.


Recently, Hamilton discovered that it had experienced a data breach in which sensitive personal identifiable information of certain Hamilton clients may have been accessed and acquired. Through its investigation, Hamilton determined that an unauthorized third-party may have accessed this sensitive information via a malware attack on a server managed by one of Hamilton’s vendors that began on September 20, 2023. On January 18, 2024, Hamilton began notifying individuals whose information may have been impacted. The type of information potentially exposed includes:

  • Name
  • Social Security number
  • Address
  • Date of birth
  • Financial account information

If you received a breach notification letter from Hamilton Investment Group d/b/a Hamilton Tax and Accounting:

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 sam@turkestrauss.com.

If you were impacted by the Hamilton 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 Hamilton Investment Group d/b/a Hamilton Tax and Accounting:
  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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