Hint: Banking in the southern hemisphere.
Answer: Westpac
Westpac, is a multinational Financial services company and became the largest bank in Australia (by market capitalisation) after it took over St.George Bank, and the second-largest bank in New Zealand. The bank is one of the Australian 'big four' banks, joining NAB, ANZ, and the Commonwealth Bank.
As of the merger with St.George in December 2008 the bank has 10 million customers, Australia's largest branch network with almost 1200 branches and an ATM network with more than 2800 ATMs. The bank is Australia's second largest provider of home lending and Australia's second largest provider of wealth platforms by funds under Administration. The bank is Australia's second largest business banking lender and Australia's second largest bank by assets.
Westpac was recognised by the Dow Jones Sustainability Index as the most sustainable bank in the world for five years running, until ANZ who shared the title in 2007 was solely awarded in 2008.