Millennium Partners Management Llc Notice Of Data Security Incident 302881103

www.prnewswire.com • September 16, 2026

NEW YORK , Sept. 16, 2026 /PRNewswire/ -- Millennium Partners Management experienced data security incident involving the personal information of some customers and employees.

On April 27, 2026, Millennium discovered a network disruption. It took immediate action to secure its network and engaged outside cybersecurity specialists to investigate. As part of the investigation, Millennium learned that its network suffered unauthorized access at times between April 24, 2026, and April 26, 2026. On July 9, 2026, it confirmed that personal information from its network had been accessed and acquired. The information may have included Social Security numbers.

Upon becoming aware of the disruption, Millennium took immediate steps to secure its systems and enhance its security posture. In addition, Millennium established a toll-free professional call center to answer questions the incident.

Generally, it is best practice to remain vigilant for risk of identity theft and fraud by reviewing and monitoring your account statements and credit reports for suspicious activity and errors. If you discover any suspicious or unusual activity on your accounts, promptly your financial institution or service provider. Individuals are entitled to one free credit report annually from each of the three major credit reporting bureaus: TransUnion, Experian, and Equifax. To order a free credit report, visit or call 1-877-322-8228.

For further information, individuals may a professional call center at 1-800-405-6108, 8:00 a.m. to 8:00 p.m. Eastern Time, Monday through Friday, excluding federal holidays.

Joshua Mooney, [email protected]

SOURCE Kennedys CMK LLP

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Millennium Partners Management Data Security Incident Exposes Personal Information On April 27, 2026, Millennium Partners Management LLC discovered a network disruption indicating unauthorized access to its systems. The breach occurred between April 24 and April 26, 2026, affecting personal information of customers and employees, potentially including Social Security numbers. The company engaged cybersecurity specialists to investigate and confirmed the breach on July 9, 2026. Following the incident, Millennium took immediate steps to secure its network and enhance security measures. A toll-free call center was established to assist affected individuals. Customers are advised to monitor their accounts for suspicious activity and can obtain free credit reports annually from major credit bureaus. The incident highlights the ongoing risks of identity theft and fraud. 3 sources 39

Extracted Entities

Attack Types (1)

Data Breach

Companies (4)

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