By David Goldman and Jose Pagliery @CNNMoney June 5, 2015: 7:17 AM ET
Heartland
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In the largest credit card breach in history, hackers stole 130 million card numbers and other account information from Heartland Payment Systems.
Heartland processes credit card payments, so naturally, it was a huge target. Heartland eventually paid more than $110 million to Visa, MasterCard, American Express, and other card companies to settle claims related to the breach.