T. Rowe Price Retirement Plan Services alerted 35,000 current and former participants in "several hundred" plans that their names and Social Security numbers were contained in files on computers that were stolen, said Brian Lewbart, spokesman.
The machines were taken from the office of CBIZ Benefits and Insurance Services Inc., which prepares the 5500s for T. Rowe Price, he said.
T. Rowe Price is record keeper for the plans.
The data were kept on the computers to help complete filing of Form 5500. Other personal information, such as addresses, and birth dates, was not on the computers.
The company offered those affected a free one-year subscription to an online credit monitoring service and up to $25,000 of identity theft insurance, as well as tips on protection from identity theft.