Grant Street Group Data Breach Letter: What Happened and Your Legal Options
Got a data breach letter from Grant Street Group?
Dapeer Law, P.A. is investigating a potential class action against Grant Street Group, on behalf of individuals whose personal information, including W-9 form information, was in files involved in a May 2026 social engineering attack at Grant Street Group's former third-party service provider, Blank Rome LLP.
Latest on the Grant Street Group data breach
- : Dapeer Law opened its investigation following notice filings posted by the Massachusetts Attorney General.
Who qualifies for the Grant Street Group data breach investigation
You may be eligible to participate in a class action if any of the following applies:
- You received a data breach notification letter from Grant Street Group dated October 2026.
- Your letter offered two years of free Epiq Privacy Solutions ID credit monitoring, with an enrollment deadline of December 31, 2026.
- Your personal information, such as a W-9 form, was in Grant Street Group files involved in the incident at its former third-party service provider, Blank Rome LLP.
- No proof of harm required to consult with counsel. You do not need to have already suffered identity theft to explore your legal options.
- Excluded: individuals who did not receive a breach notice and whose information was not involved in the incident.
Not sure if you qualify?
Send us your notice, we'll confirm your eligibility at no cost.
What happened in the Grant Street Group data breach
According to a notice letter dated October 9, 2026, sent on behalf of Grant Street Group ("Grant Street") by its outside counsel, on May 21, 2026 an attorney at Blank Rome LLP, a former third-party service provider to Grant Street, "was misled into uploading certain files to an external Google Drive folder during a social engineering attack." The letter says that within several hours the compromised device was taken offline and the files were deleted from that external folder, and that Blank Rome began an internal investigation with third-party cybersecurity professionals and notified law enforcement.
The letter states that Grant Street was informed of the incident on September 11, 2026, nearly four months after it occurred, and has conducted its own internal review of its breached files. According to the letter, those files included a W-9 form containing information including the recipient's name, Social Security number, address, and signature, and to Grant Street's knowledge no other sensitive personal or financial information of the recipient was compromised. The Massachusetts filing, reported to the Massachusetts Attorney General on October 20, 2026, lists name, social security number, address and signature and reports 1 Massachusetts resident. Grant Street is offering two years of free credit monitoring through Epiq Privacy Solutions ID, with an enrollment deadline of December 31, 2026.
Whether the files were adequately protected while in the hands of Grant Street's service provider, and whether the time it took to notify affected individuals caused additional harm, are among the issues being evaluated.
What to do if you got a Grant Street Group data breach letter
Keep your notice letter
Do not discard it. The enclosed Epiq instructions contain your activation code for credit monitoring, and the letter is important evidence if you decide to participate in a lawsuit.
Enroll in the free 24-month credit monitoring
Enroll in Epiq Privacy Solutions ID at the website listed in your letter using your activation code before the December 31, 2026 enrollment deadline. Accepting this benefit does not waive your right to pursue legal action.
Place a fraud alert or credit freeze
Contact Equifax, Experian, and TransUnion to place a fraud alert or freeze on your file. Request a free weekly credit report from AnnualCreditReport.com, and use the FTC's IdentityTheft.gov recovery guide.
Speak with a data breach attorney
Consultations with Dapeer Law are free and confidential. We'll review your notice, explain your options, and advise whether you may be eligible to join a class action.
Submit your notice for a free review
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Grant Street Group breach timeline
Compensation you may be entitled to
Out-of-pocket expenses
Credit freezes, identity restoration services, and other costs incurred responding to the breach.
Time spent monitoring
Hours spent reviewing accounts, disputing fraudulent charges, and dealing with identity theft issues.
Identity theft & fraud losses
Unreimbursed funds stolen from accounts, unauthorized credit lines, or tax refund fraud tied to the breach.
Statutory damages
Certain state data breach and consumer protection statutes provide for fixed damages regardless of actual loss.
Injunctive relief
Court orders requiring Grant Street Group to implement stronger practices for protecting personal information, including information shared with its service providers.
Compensation categories depend on applicable state law, the types of data exposed, and documented losses. No recovery is guaranteed.
Grant Street Group data breach FAQ
I received a data breach letter from Grant Street Group. What should I do? +
Keep the letter, enroll in the free two-year Epiq Privacy Solutions ID credit monitoring before the December 31, 2026 enrollment deadline, monitor your financial accounts, consider a fraud alert or credit freeze, and contact a data breach attorney for a free consultation. Accepting credit monitoring does not waive your right to sue.
Is the Grant Street Group data breach letter real or a scam? +
Grant Street Group has reported this incident to the Massachusetts Attorney General. Compare your letter to the official filing linked in Sources below, and use only the enrollment website and phone number printed in your letter. Be cautious of unexpected calls, texts or emails about the breach that ask for your Social Security number or account login. If you are unsure, send your letter to Dapeer Law for a free review.
Am I eligible to join a class action against Grant Street Group? +
If you received a breach notice about this incident sent on behalf of Grant Street Group, you are likely eligible for a free case evaluation. Eligibility depends on your state of residence, the categories of your data that were involved, and any losses you have suffered. Dapeer Law will review your notice at no cost.
How much money could I receive from a class action lawsuit? +
Data breach class action recoveries vary significantly. Settlements typically range from a few hundred dollars for basic out-of-pocket losses to several thousand dollars for documented identity theft, with class size, damages, and negotiation all affecting the final amount. No payout is guaranteed, and this investigation has not yet resulted in a settlement.
What personal information was exposed in the breach? +
According to the letter, the breached files included a W-9 form containing information including the recipient's name, Social Security number, address, and signature. The letter states that, to Grant Street's knowledge, no other sensitive personal or financial information was compromised. The Massachusetts filing lists name, social security number, address and signature. Check your own letter for the information it lists for you.
Did Grant Street Group offer free credit monitoring? +
Yes. The letter says Grant Street is making two years of credit monitoring available free of charge through Epiq Privacy Solutions ID, and the enclosed Epiq instructions list a 24-month coverage length and an enrollment deadline of December 31, 2026. Enrollment is separate from, and does not waive, your right to pursue a claim.
How many people were affected by the Grant Street Group breach? +
Grant Street Group has not disclosed a total number of affected individuals. Its Massachusetts filing reports 1 Massachusetts resident, which covers that state only. This page will be updated as additional information becomes available.
Is there a deadline to take legal action? +
Yes. Statutes of limitations for data breach claims vary by state and legal theory, typically ranging from one to six years. Waiting can permanently bar your claim. Contact us as soon as possible for a free evaluation.
How do I get a copy of the official breach notice? +
Grant Street Group's notice letter, sent by its outside counsel Tucker Arensberg, P.C., is posted with its Massachusetts data breach filing (linked in Sources below). If you received a letter but no longer have it, Dapeer Law can assist you in obtaining a copy during your free consultation.
Sources & references
- Official breach notice filing · Massachusetts data breach notice filing, Grant Street Group, LLC
- Credit bureau freezes · Equifax · Experian · TransUnion
- Free weekly credit reports · AnnualCreditReport.com
- Identity theft recovery guide · FTC IdentityTheft.gov
Don't let the deadline decide for you. Submit your claim today.
You only have a limited window to act. Our team will review your notice, explain your options, and tell you whether you may be eligible to recover compensation, at no cost to you.
