The JPMorgan Chase global headquarters is seen on November 13, 2025, in New York City. Angela Weiss/AFP/Getty Images

Hackers stole a trove of data from a company used by major Wall Street banks for real-estate loans and mortgages, setting off a scramble to determine what was taken and which banks were affected, according to people familiar with the investigation and a statement from the firm.

New York-based SitusAMC, which boasts 1,500 clients, said Saturday night that account records and legal agreements related to some of its clients had been impacted in the hack.

“The incident is now contained and our services are fully operational,” SitusAMC said . “No encrypting malware was involved.”

The firm discovered the unauthorized access to its systems on November 12 and within a few da

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