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Mercadien Data Breach Lawsuit Investigation
Shamis & Gentile P.A., one of the nation's premier class action law firms specializing in data breach cases, is investigating the Mercadien PC Certified Public Accountants data breach.
If you were affected by the data breach, your sensitive personally identifiable information may have been exposed, and you may be eligible for compensation.
About Mercadien PC Certified Public Accountants
Mercadien PC Certified Public Accountants, also known as The Mercadien Group, is a professional services firm founded in 1963 and based in Hamilton, New Jersey. The company provides a wide range of accounting, tax, advisory, and mergers and acquisitions services to clients throughout the United States and Europe.
Mercadien offers traditional audit and financial reporting, tax compliance and planning, risk assessment, litigation support, transaction advisory, and outsourced CFO services. They have also expanded into wealth management and recently launched Mercadien Capital Advisors, focusing on mergers and acquisitions for middle-market businesses.
What Happened?
In November 2025, Mercadien discovered a significant data breach affecting the personal information of certain individuals. The breach was identified on Nov. 7, 2025, and the company began notifying affected consumers on Dec. 1, 2025 by mail.
Information Exposed
- Names
- Addresses
- Dates of birth
- Email addresses
- Phone numbers
- Social Security numbers
- Financial account information
- Usernames and passwords
- IRS PIN numbers
- Payment card information
Mercadien reported the breach to the Maine Attorney General's office on Dec. 31, 2025, and to the Massachusetts Attorney General's office on Dec. 24, 2025. At this time, the number of affected individuals in Maine and Massachusetts has not been disclosed.
Your Rights and Next Steps
If you received a notice about the Mercadien data breach or believe your information may have been involved, you have important rights and options. You may be entitled to seek compensation for any harm or inconvenience caused by this cybersecurity incident.
- Communication and credit monitoring services: Review and save any notification letters you receive. Enroll in free credit monitoring and identity protection services, if offered.
- Monitor your accounts carefully: Check your financial statements regularly for suspicious activity or unauthorized transactions. If you notice anything unusual, contact your financial institution immediately.
- Fraud alert and credit reports: A fraud alert informs creditors to take extra steps to verify your identity before opening new accounts in your name. Consumers are also entitled to one free credit report annually from each credit bureau. You can request a fraud alert or a credit report by contacting any one of the three major credit bureaus.
- Seek legal help: Lawyers are ready to help you understand your rights and pursue compensation.
You May Be Entitled to Compensation
If your information was exposed in the Mercadien data breach, you may be eligible for compensation, which could include reimbursement for out-of-pocket expenses, time spent addressing the breach, or payment for emotional distress.
Data breach laws provide protections and remedies for individuals whose sensitive information is compromised due to a company’s failure to safeguard data. To find out if you qualify and to join a lawsuit, complete the form below.
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