Monumental Sports & Entertainment, operating as Lincoln Holdings LLC, experienced a hacking-related security incident between December 8-9, 2025. The company discovered the unauthorized access on December 9, 2025. Following an investigation that concluded around April 7, 2026, Monumental Sports notified various state Attorneys General, beginning April 27, 2026, and started sending written notices to affected individuals on April 28, 2026.
The breach involved various types of personal data, including names, Social Security numbers, dates of birth, addresses, government IDs, medical information, and financial information, such as financial account details and credit/debit card numbers. The data elements exposed varied by individual. A total of 10,282 individuals across multiple U.S. states, including Indiana, Maine, Massachusetts, New Hampshire, and Vermont, were affected. Identity theft protection services through Kroll, including credit monitoring, fraud consultation, and identity theft restoration, were offered for 24 months to those affected.
Details surrounding the nature of the hacking incident and specific information about affected individuals are continuing to emerge as notifications are processed.