Nationwide Building Society

Nationwide Building Society is the world's largest building society and a member-owned mutual, providing banking and financial services to more than 7 million members across the United Kingdom. It is authorized by the Prudential Regulation Authority and regulated by the Financial Conduct Authority, operating within a governance and consumer-protection framework characteristic of a large UK retail financial institution. The Society is headquartered in Swindon.

Its business spans a broad range of retail financial services, including current accounts, mortgages, savings accounts, ISAs, personal loans, credit cards and insurance. These are delivered through a network of branches alongside digital channels, among them a widely used mobile banking application and a comprehensive internet banking platform, reflecting an emphasis on financial services technology including digital and mobile banking.

As a mutual, Nationwide is owned by its members rather than external shareholders, a structure that shapes its stated commitment to member interests and competitive rates. The Society is ranked as the UK's number one brand for customer satisfaction in the UK Customer Satisfaction Index, is endorsed by Which?, and reports that more customers switch to Nationwide than to any other provider. It has served customers for decades.