Mainstream Insurance Agency Data Breach Lawsuit Investigation
On December 18, 2025, Mainstream Insurance Agency, Inc. (“Mainstream Insurance Agency”) disclosed a data security incident that compromised sensitive customer information. If you received a breach notice, read on to see what was exposed, the free services being offered, and how to preserve your legal rights.
Take action: Review the facts below, activate the complimentary Kroll identity monitoring, and explore your options for participating in a potential lawsuit to recover losses.
Key Incident Facts
- Breach announced: December 18, 2025
- Total individuals affected: 4,232
- State reporting the breach: Massachusetts
- Data types exposed: Driver’s license numbers, financial account information
- Free services offered: Two-year membership to Kroll Identity Monitoring (credit monitoring, fraud consultation, identity-theft restoration)
What Information Was Involved?
The company’s notice confirms that driver’s license numbers and financial account information belonging to 4,232 Massachusetts residents were accessed during the incident.
What Mainstream Insurance Agency Is Doing
Mainstream Insurance Agency is providing affected individuals a complimentary two-year subscription to Kroll Identity Monitoring. The service includes:
- Credit monitoring across all three major bureaus
- Fraud consultation and guidance
- Identity-theft restoration support
Eligible recipients must enroll through enroll.krollmonitoring.com before the activation deadline listed in their letter.
Download Official Breach Notice (PDF)Steps You Can Take Right Now
- Activate your free Kroll Identity Monitoring membership.
- Review bank and credit-card statements for unfamiliar charges.
- Request free credit reports at AnnualCreditReport.com and check for new accounts.
- Place a fraud alert or security freeze with Equifax, Experian and TransUnion if you detect suspicious activity.
- Contact the Federal Trade Commission via IdentityTheft.gov or 1-877-IDTHEFT (438-4338) to create a recovery plan if you believe you are a victim of identity theft.
- Preserve all correspondence from Mainstream Insurance Agency; you may need it to pursue legal claims.
Can You File a Lawsuit or Claim?
Data-breach victims often seek compensation for out-of-pocket losses, time spent addressing fraud, and the diminished value of their personal information. Attorneys are currently evaluating claims on behalf of Mainstream Insurance Agency customers. Keep copies of your notice letter and any evidence of fraudulent activity to support your potential case.
Company Overview
Full legal name: Mainstream Insurance Agency, Inc.
Headquarters: 704 Southbridge St, Worcester, MA, USA
Industry: Insurance
Year founded: 1991
Website: https://www.mainstreamins.com
Facebook: @mainstreamins
Frequently Asked Questions
I received a data breach letter from Mainstream Insurance Agency — what should I do?
Follow the enrollment instructions in your letter to activate the free Kroll Identity Monitoring, monitor your financial accounts, and consider placing a security freeze. Retain all documents for potential legal claims.
How do I submit a claim related to the Mainstream Insurance Agency data breach?
Collect your breach notice letter, any proof of fraud, and receipts for out-of-pocket expenses. Then contact a data-breach attorney to discuss class-action or individual claim options.
What information did the Mainstream Insurance Agency breach expose?
The incident involved driver’s license numbers and financial account information.
Did Mainstream Insurance Agency offer credit monitoring, and for how long?
Yes. Impacted individuals receive a complimentary two-year subscription to Kroll Identity Monitoring.
How many people were affected by the Mainstream Insurance Agency breach?
The company’s filing with the Massachusetts Attorney General lists 4,232 affected individuals.
How can I get the official breach notice (PDF) for Mainstream Insurance Agency?
You can download it directly from the Massachusetts Attorney General’s website using the button above.
