• December 2025 •

Mercadien PC Certified Public Accountants Data Breach

Last Updated on February 24, 2026

If your information was compromised in the Mercadien data breach, you may be able to start a class action to collect money for the harm you’ve suffered.

• Keep reading for more information

At A Glance

What's Going On?: Attorneys need to hear from people affected by the Mercadien data breach as they investigate whether a class action lawsuit can be filed.
What You Can Do: If you believe your information may have been compromised in the Mercadien data breach, fill out the form on this page to learn more about the investigation and how you can help.
Does This Cost Anything?: It costs nothing to get in touch or to talk to someone about your rights.
What Can I Get?: If filed and successful, a class action lawsuit could provide consumers with money for any harm resulting from the Mercadien breach.

Mercadien Data Breach: Lawsuit Investigation

Attorneys working with ClassAction.org are looking into whether a class action lawsuit can be filed in light of the Mercadien data breach.

As part of their investigation, they need to hear from individuals who had their information exposed in the incident, including those who received notice of the Mercadien data breach or otherwise believe they are affected.

Mercadien Security Incident: What Happened?

Mercadien PC Certified Public Accountants, based in Hamilton, New Jersey, recently reported a data breach that may have affected the personal information of certain individuals. The firm, known for its accounting and advisory services, discovered the incident on November 7, 2025. Mercadien launched an investigation, involved law enforcement, and hired a national cybersecurity firm to assess and mitigate potential impacts.

According to a data breach notice posted to Mercadien’s website, the breached information may include names, addresses, dates of birth, government ID numbers, Social Security numbers, and financial account details. For some, usernames, passwords, IRS pin numbers, and payment card information may also be compromised.

The Mercadien data breach was first reported to the Maine Attorney General and Massachusetts Office of Consumer Affairs and Business Regulation in late December 2025.

What You Can Do After the Mercadien Data Breach

If your information was exposed in the Mercadien data breach, attorneys want to hear from you. You may be able to start a class action lawsuit to recover compensation for loss of privacy, time spent dealing with the breach, out-of-pocket costs, and more.

A successful case could also force Mercadien to ensure they take proper steps to protect the information they were entrusted with.

Affected by the Mercadien data breach? Fill out the form on this page today.