Blackstone 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 Blackstone Inc. 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 Blackstone

Founded in 1985 by Peter Peterson and Stephen Schwarzman, Blackstone Inc. began as a mergers and acquisitions advisory boutique before expanding into private equity and other investment areas. The company is headquartered in New York City.

Blackstone invests across a wide range of sectors, including real estate, private equity, infrastructure, credit, and hedge funds. The company serves both institutional investors, such as pension funds and insurance companies, and individual investors through its private wealth division.

What Happened?

On July 23, 2026, Blackstone experienced a cybersecurity incident where an unauthorized party briefly accessed several employee user accounts. The access allowed the intruder to obtain copies of files from certain cloud-based file repositories.

Blackstone responded by stopping the unauthorized access, launching an investigation with outside data security experts, and notifying law enforcement.

The investigation determined that personal information was affected by this incident. The types of consumer information exposed include:

Information Exposed:

• Social Security numbers
• Financial account information

You May Be Entitled to Compensation

If your personal information was exposed in the Blackstone data breach, you may be eligible for compensation. Lawyers are ready to help individuals affected by this incident understand their rights and pursue potential claims for damages, including reimbursement for time spent addressing the breach or losses resulting from identity theft.

To find out if you qualify and to take the next step, complete the below form to join a lawsuit.

Sources

• Massachusetts Attorney General
• Dark web