US Tiger Securities Data Breach

US Tiger Securities, which operates Tiger Brokers and is affiliated with TradeUP Securities, disclosed that an unauthorized third party encrypted and copied files from a virtual back-office environment on July 8–9, 2025.

The incident exposed sensitive personal information, including Social Security numbers, government identification details, medical information, and health insurance information, affecting approximately 26,985 people in the United States. The company said production systems and customer-facing trading operations were not affected, but the breach creates identity-theft and regulatory-notification concerns for impacted individuals.