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Learn how to participate in the class action and what compensation you may be entitled to.
Join the Class Action →Use our verification tool to confirm your letter matches this official AG filing.
Verify My Notice LetterThis page references a public filing made with the state filing in MA. This website is not affiliated with, endorsed by, or operated by any state government agency.
Based on the data types reported in this filing:
Your SSN is the master key to your identity. Once exposed, criminals can open new lines of credit, take out loans, or file taxes in your name.
Combined with a name and other leaked data, date of birth helps criminals pass identity verification questions at banks and government agencies.
Home address exposure can enable mail theft, package fraud, and targeted phishing attacks that reference your known location.
Adicet Bio, Inc. was responsible for safeguarding the personal data of its customers and employees. According to a MA state filing, Adicet Bio, Inc. experienced a data security incident affecting an undisclosed number of individuals, exposing protected health information and medical records. Legal proceedings relating to this breach are ongoing.
Large-scale data breaches rarely affect uniform categories of data for all victims. Some individuals in the Adicet Bio, Inc. breach may have had minimal data exposed, while others may have had comprehensive records compromised. Because the full scope of exposure often takes months to assess, a free legal review is the most reliable way to understand your specific situation.
Adicet Bio, Inc. appears to be a biotechnology and clinical-stage life sciences company specializing in the research and development of immunotherapies. In the course of clinical trials, research operations, and business administration, companies in this sector typically collect and store sensitive personal information, including participant medical records, genetic data, dates of birth, names, and contact details, alongside employee information. In 2025, Adicet Bio, Inc. officially reported a data breach to the Massachusetts Attorney General's office. If you received a formal data breach notification letter in the mail, it means your personal information may have been involved in this security incident. The notification letter is intended to inform you of the event, explain the steps the company is taking, and provide guidance on how to protect your personal data.
Common categories of compensation in data breach class actions
Courts recognize that the time spent monitoring accounts, placing credit freezes, and dealing with the aftermath of a breach has real economic value. This category of damages is recoverable even without direct financial loss.
Professional credit monitoring services cost $10–$40 per month. Identity theft restoration services, if needed, can cost hundreds of hours and thousands of dollars. Courts have awarded these costs as direct damages in SSN breach cases.
HIPAA violations carry civil penalties between $100 and $50,000 per violation. Where a healthcare organization's negligence led to the exposure of protected health information, class members may recover statutory damages in addition to actual losses.
Several state data breach laws provide for statutory minimum damages — fixed amounts recoverable per affected individual regardless of actual loss. These provisions exist specifically to make legal action viable for victims who have not yet experienced direct harm.
Under the Massachusetts Data Security Law (201 CMR 17.00), you may have a legal claim against Adicet Bio, Inc. if any of the following apply:
Applicable State Law
This breach was reported under the Massachusetts Data Security Law (201 CMR 17.00), which mandates notification and establishes your right to seek damages.
Received a notification letter from Adicet Bio, Inc.?
Read our dedicated guide — what the letter means and what to do.
No. Under Massachusetts Data Security Law (201 CMR 17.00) and federal law, the unauthorized exposure of your personal data — regardless of whether it has been actively misused — can be sufficient grounds for a claim. The breach itself is the injury.
Nothing. The Law Office of David S. Harris handles data breach cases on contingency — you pay zero upfront and owe nothing unless compensation is recovered.
Immediately place a free credit freeze at all three bureaus (Equifax, Experian, TransUnion). A freeze blocks new accounts from being opened in your name. Then file a complaint with the FTC at IdentityTheft.gov and contact our office — SSN exposure is one of the most serious breach types.
If Adicet Bio, Inc. is a covered healthcare entity or business associate under HIPAA, affected patients have additional rights — including the right to an HHS complaint. These HIPAA violations also strengthen civil damages claims. Consult an attorney to understand your full remedies.
Statutes of limitations for data breach claims vary by state but typically run 2–4 years. Depending on when you learned of the breach, you may still have time. Contact our office for a free eligibility review — there is no cost to find out.
Accepting free credit monitoring from Adicet Bio, Inc. does not waive your right to pursue legal action unless you signed a specific release waiving claims. In most cases, victims who accepted monitoring can still file.
Not necessarily. Many data breach victims are never notified directly. If your personal information was held by Adicet Bio, Inc. during the relevant period, you may still qualify even without receiving a letter. A free eligibility review can confirm your status.
Adicet Bio, Inc. breach?
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