Transport Workers Union Local 100 Data Breach Lawsuit Investigation

Shamis & Gentile P.A., one of the nation's premier class action law firms specializing in data breach cases, is investigating the Transport Workers Union Local 100 data breach.

If you were affected by the data breach, your sensitive personally identifiable information may have been exposed, and you may be eligible for compensation.

About Transport Workers Union Local 100

Transport Workers Union Local 100 (TWU Local 100) is a labor union representing transportation workers throughout the New York City public transit system and surrounding areas.

Founded in 1934, TWU Local 100 represents transit workers, including bus operators, station agents, cleaners and maintenance staff. The union is known for its involvement in contract negotiations and for providing training programs to help members advance in their careers.

What Happened?

TWU Local 100 identified an intrusion on certain systems by an unauthorized third party. The breach was discovered after the union noticed suspicious activity and took action to secure their systems.

According to their investigation, specific data files were accessible to the unauthorized party for a limited time between Jan. 29, 2026, and Feb. 3, 2026. On April 15, 2026, the union determined that some of these files contained personal information.

The breach was linked to a ransomware attack by the group known as Qilin, who claimed responsibility and posted about the incident on the dark web on Feb. 23, 2026.

Information Exposed:

• Names
• Dates of birth
• Social Security numbers
• Health insurance subscriber identification numbers

The incident was reported to the Massachusetts Attorney General on April 24, 2026, with at least nine Massachusetts residents affected.

You May Be Entitled to Compensation

If your personal information was exposed in the Transport Workers Union Local 100 data breach, you may be eligible for compensation. Lawyers are ready to help you understand your rights, investigate your claim and pursue possible compensation for damages such as time spent monitoring accounts, out-of-pocket losses or emotional distress.

To find out if you qualify and to join a lawsuit related to this data breach, complete the below form.

Sources

• Massachusetts Attorney General
• Dark web