Description TierOne Corporation is the holding company for TierOne Bank, which operates approximately 70 branches throughout Nebraska, northern Kansas, and southwestern Iowa. Serving consumers and businesses, the bank offers a variety of deposit products, including different checking options, savings and retirement accounts, and CDs. The bank primarily writes real estate loans (including commercial and residential mortgages and construction and development loans), which account for three-quarters of the company's loan portfolio. TierOne Bank also issues consumer and business loans.