Global information services group Experian announced Thursday that one of its business units had been hacked. The breach occurred on a server that contained data on behalf of one of its clients, T-Mobile. The data includes personal information for a combination of about 15 million customers and credit applicants in the U.S. The company said that the incident did not impact its own consumer credit database. The data also included applicants requiring a credit check for service or device financing from Sept. 1, 2013 through Sept. 16, 2015, Experian North America said in a statement. The ADRs of Ireland-headquartered Experian closed Thursday up nearly 1.7 percent to $16.38, while shares of T-Mobile were down more than 1 percent in extended trading. Experian said it took immediate action upon finding the breach: it secured the server, initiated a comprehensive investigation and notified U.S. and international law enforcement. The data stolen included names, dates of birth, addresses and Social Security numbers. No payment card or banking information was acquired, the company said.
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