Merrill Lynch is to offer free credit monitoring to an unspecified number of employees after a laptop containing staffing records and personal financial details was stolen from one of its offices.
The US brokerage told reporters working for Reuters that the theft did not involve client information.
It did not give other details and declined to say how many employees records were on the computer.
In a statement, the firm said: "We have no reason to believe at this point that anyone has gotten access to the protected information. While we think the possibility of someone gaining access to the data is small, we have notified affected employees and offered free credit monitoring to them."