Pedestrians walk by the Northern Trust banking company's headquarters in Chicago, Illinois.

Northern Trust had shortcomings in its "living will" plans and has until year-end to update a proposal for how to unwind if it went bankrupt, U.S. regulators said on Friday as they granted an extension for four foreign banks to comply.

Barclays, Credit Suisse, Deutsche Bank, and UBS each received one-year extensions to July 2018 to satisfy regulators on their living wills, according to the U.S. Federal Reserve.