First National Bank & Trust Co. is the largest tribally-owned national bank in the United States and has branches in Shawnee, Holdenville, Granite, Mangum, and Lawton. With a capital structure of $2.5 million, the bank opened its doors on Oct. 29, 1984, and Citizen Potawatomi Nation purchased it in February 1989. Since its founding, FNB has grown steadily through sound financial management practices and by investing time, energy, and resources in the communities we serve.