Bank of the West has expanded from the California frontier to its current position as one of the top 25 commercial banks in the nation, with assets of $67 billion. The bank now serves more than 4 million business and household accounts in hundreds of communities in 19 Western and Midwestern states: Arizona, California, Colorado, Idaho, Iowa, Kansas, Minnesota, Missouri, Nebraska, Nevada, New Mexico, North Dakota, Oklahoma, Oregon, South Dakota, Utah, Washington, Wisconsin and Wyoming. Through holding company BancWest Corporation, the bank is a subsidiary of BNP Paribas, one of the six highest rated banks in the world.