Marquis says over 672,000 people had personal and financial data stolen in ransomware attack

Marquis, a technology company used by hundreds of banks to analyze and visualize their customers’ data, says hundreds of thousands of people had their personal and sensitive financial information stolen in a ransomware attack last year.

The Plano, Texas-based fintech company is notifying at least 672,075 people that hackers stole their information during the August 2025 cyberattack, according to a listing with Maine’s attorney general’s office.