NEW YORK (TheStreet) -- JPMorgan (JPM - Get Report)  said Thursday that the personal data of approximately 76 million retail customers and 7 million business customers was compromised in a security breach that the bank first disclosed this summer.

The data breach includes customers' names, addresses, phone numbers and email addresses. JPMorgan, in a filing with the Securities and Exchange Commission, said there is no evidence that sensitive financial information such as bank account numbers, social security numbers or user IDs were compromised as a result of the breach.

"The Firm continues to vigilantly monitor the situation and is continuing to investigate the matter. In addition, the Firm is fully cooperating with government agencies in connection with their investigations," JPMorgan said.

JPMorgan, the nations largest bank by assets, said that unlike retailers suffering data breaches, it has seen no rising incidence of fraud in customer accounts since first discovering the hack in June and July.

For now, JPMorgan said it doesn't believe customers need to change their passwords or account numbers. The bank also noted that customers are not liable for unauthorized transactions and should report any suspicious activity.

"We are very sorry that this happened and for any uncertainty this may cause you," JPMorgan said in an alert to customers.

Shares in JPMorgan were falling less than 1% on Thursday to $58.60 in after-hours trading.

-- Written by Antoine Gara in New York

Follow @AntoineGara