NBT Bank completed its first acquisitions in the 1930s. Since that time, the bank has continued to grow through bank and branch acquisitions as well as through organic expansion. Since 2000, NBT Bank acquired the following banks: LA Bank based in
Scranton, Pennsylvania in 2000; Pioneer American Bank based in
Carbondale, Pennsylvania in 2000; First National Bank of Northern New York based in
Norfolk, New York in 2001; Central National Bank based in
Canajoharie, New York in 2001; City National Bank and Trust Company based in
Gloversville, New York in 2005; Hampshire First Bank based in
Manchester, New Hampshire in 2012; and Alliance Bank based in
Syracuse, New York in 2013. The merger with Alliance Bank was completed on March 8, 2013 and is NBT Bank's largest to date. In December 2022, NBT announced that it will acquire the Connecticut-based Salisbury Bancorp in an equity transaction valued at $204 million. The deal for Salisbury Bancorp closed in August 2023 for $204 million and Salisbury Bank President and CEO Richard J. Cantele Jr. was named to the NBT Bank board of directors and executive management team. NBT acquired Evans Bank of Williamsville, NY on May 2, 2025. The merger extended NBT’s branch network into the Western Region of New York with the addition of 14 banking offices in the Buffalo area and 4 locations in greater Rochester. == Naming rights ==