National Australia Bank Limited is one of the four largest financial institutions in Australia in terms of market capitalisation, earnings and customers. NAB was ranked the world's 21st-largest bank measured by market capitalisation and 52nd-largest bank in the world as measured by total assets in 2019. As of January 2019, NAB operated 3,500 Bank@Post locations—including 7,000+ ATMs across Australia, New Zealand, and Asia—and served 9 million customers. NAB has an "AA−" long-term issuer rating by Standard & Poor's. Wikipedia