Eisen, Inc. Data Breach Exposes Sensitive Financial Records in Social Engineering Attack Eisen, Inc., a New York-based financial services firm specializing in AI-driven regulatory technology, disclosed a data breach stemming from a December 12, 2025, social engineering attack. The company, which serves banks, brokerages, and digital asset exchanges, fell victim when a threat actor impersonated the California State Controller’s Office and requested unclaimed property compliance records. An employee, believing the request to be legitimate, granted access to the file before Eisen identified the fraud and contained the incident. The breach compromised sensitive personal data processed by Eisen on behalf of its clients, including names, mailing and email addresses, Social Security numbers, dates of birth, and unclaimed property balances. Eisen filed a notice with the California Attorney General on June 24, 2026, detailing the exposure. The incident has prompted legal investigations, with class action law firm Shamis & Gentile P.A. reviewing potential compensation claims for affected individuals. Eisen’s clients and their customers may be among those impacted.