JPMorgan Chase is buying most assets of First Republic Bank after the nation’s second-largest bank failure ever, in a deal announced early Monday that protects the deposits of First Republic’s customers.

JPMorgan Chase said it had acquired “the substantial majority of assets” and assumed the deposits, insured and uninsured, of First Republic from the Federal Deposit Insurance Corporation, the independent government agency that insures deposits for bank customers.

“In carrying out this transaction, JPMorgan Chase is supporting the US financial system through its significant strength and execution capabilities,” the bank said in a statement.

The FDIC took control of the embattled First Republic and then immediately announced the sale. The failure will cost the FDIC about $13 billion. That money will be paid by the nation’s banks, which pay premiums to support the agency.

A sale price was not disclosed in a statement from the FDIC, which conducted an auction among several banks to see which would end up with First Republic’s assets.