NBT Bancorp Inc is a financial holding company that operates through its subsidiaries. The company's principal sources of revenue include management fees and dividends it receives through its subsidiaries. Its business, predominantly conducted through NBT Bank, consists of providing commercial banking, retail banking, and wealth management services to customers in its market area, which includes upstate New York, northeastern Pennsylvania, southern New Hampshire, western Massachusetts, Vermont, southern Maine, and central and northwestern Connecticut. The company's reportable segments are Banking and Retirement Plan Administration. A majority of its revenue is generated from the Banking segment.