Strauss Borrelli PLLC, a leading data breach law firm, is investigating Leonard, Mulherin & Greene, PC (“LMG”), regarding its recent data breach. The LMG data breach may have involved sensitive personal identifiable information belonging to over 3,300 individuals.
ABOUT LEONARD, MULHERIN & GREENE, PC:
LMG is a full-service accounting, tax, and business consulting firm based in Massachusetts.2 Accordingly, LMG includes individuals who are both CPAs and attorneys to offer clients advice and solutions from a single source on a variety of business and tax issues.2 Headquartered in Braintree, Massachusetts, LMG employs over 10 individuals.3
WHAT HAPPENED?
On August 14, 2025, LMG reported to the Attorney General of Maine that it had experienced a data breach in which the sensitive personal identifiable information in its care may have been compromised.1 According to the breach notice, on December 2, 2024, LMG became aware of unusual activity on one of its email accounts.1 As a result, LMG launched an investigation to determine the nature of the incident.
Through its investigation, LMG determined that certain portions of its network may have been accessed and acquired by an unauthorized third party on or around November 21, 2024.1 As a result, LMG began a review of the data to determine what information had been impacted as well as identify the specific individuals affected. On August 7, 2025, LMG completed its investigation. While the information impacted varies depending on the individual, the type of information potentially exposed includes:
- Name
- Social Security number
- Financial account information
On August 13, 2025, LMG began mailing data breach notification letters to impacted individuals. Based on the breach notice sent to Maine residents, LMG is providing affected individuals with a list of the specific types of sensitive information impacted and 12 months of complimentary credit monitoring services. A link to the form breach notification letters that LMG filed with the Attorney General of Maine is below.
If you received a breach notification letter from Leonard, Mulherin & Greene, PC:
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 872.263.1100 or sam@straussborrelli.com.
