Millennium Partners Management LLC Announces Data Security Incident
Millennium Partners Management LLC has disclosed that it experienced an unauthorized data security incident affecting the personal information of some customers and employees. The breach was discovered on April 27, 2026, following a network disruption between April 24 and April 26, during which cybercriminals gained access to sensitive data such as Social Security numbers. The firm immediately secured its systems and engaged cybersecurity experts for an investigation. On July 9, it confirmed that personal information had been accessed or acquired by unauthorized parties. Millennium has set up a toll-free call center to address concerns from affected individuals and advised them to monitor their accounts closely for signs of fraud or identity theft. The company also recommended checking credit reports annually through the three major bureaus—TransUnion, Experian, and Equifax—and provided contact details for further assistance.