Citigroup Global Markets Inc. was responsible for safeguarding the personal data of its customers and employees. According to a MA state filing, Citigroup Global Markets Inc. experienced a data security incident affecting an undisclosed number of individuals, exposing financial account information and payment data. Although disclosed some time ago, affected individuals may still have legal options.
Data Exposed
Retail data breaches typically involve large volumes of payment card information and customer contact records. Stolen card data is sold on dark web markets and monetized quickly — often within 24 to 72 hours of a breach. If Citigroup Global Markets Inc. stored your payment information, the risk of unauthorized transactions is immediate and concrete.
Citigroup Global Markets Inc. appears to be a major financial institution providing wealth management, brokerage, and investment banking services. As a leader in the financial sector, the company typically collects and stores highly sensitive consumer information, including names, Social Security numbers, dates of birth, account numbers, and detailed financial account information. In 2025, the company officially reported a data breach to the Massachusetts Attorney General. If you received a data breach notification letter in the mail, it means your personal information may have been compromised in this incident. This page provides an overview of the situation to help you understand what occurred and what steps you should take to protect your financial identity.
Based on the data types reported, affected individuals face:
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.
What the Massachusetts Data Security Law (201 CMR 17.00) and federal statutes entitle you to recover:
The hours spent responding to a data breach — canceling accounts, contacting credit bureaus, updating passwords, and investigating fraud — represent compensable economic harm in data breach litigation.
Once your SSN is exposed, protection becomes an ongoing expense. Plaintiffs in data breach settlements have recovered costs for credit freezes, identity protection subscriptions, and time spent dealing with fraudulent accounts — sometimes covering multiple years of exposure.
Fees charged to close and reopen accounts, issue replacement cards, or dispute fraudulent transactions are recoverable in data breach litigation. So are the costs of overdrafts, late payments, and credit damage caused by unauthorized activity.
Data breach victims regularly report anxiety, loss of sleep, and ongoing fear of identity theft. These non-economic harms are cognizable injuries in data breach litigation, particularly in cases involving SSN or medical record exposure.
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.
Banks may reverse fraudulent charges, but they are not obligated to compensate you for time lost, stress, or indirect damages. A class action claim against the breached company can recover those additional categories of harm.
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 Citigroup Global Markets 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 Citigroup Global Markets Inc. during the relevant period, you may still qualify even without receiving a letter. A free eligibility review can confirm your status.
Received a notification letter from Citigroup Global Markets Inc.?
What it means and what to do next.
Citigroup Global Markets Inc. breach?
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