NBT Bank, History
The following are major historical events for NBT Bank, including mergers and acquisitions.
| 1856-03-03 | Institution established: Original name:The National Bank and Trust Company of Norwich | |
| 1971-02-16 | Acquired The Farmers National Bank of Deposit (7026) in DEPOSIT, NY | |
| 1973-10-01 | Acquired The First National Bank of Newark Valley (7187) in NEWARK VALLEY, NY | |
| 1974-06-28 | Acquired The National Bank of Hobart (7103) in HOBART, NY | |
| 1978-12-30 | Acquired First National Bank in Sidney (7305) in SIDNEY, NY | |
| 1984-08-01 | Acquired The National Bank of Oxford (13970) in OXFORD, NY | |
| 1986-05-30 | Reorganized. | |
| 1989-09-29 | Changed name to The National Bank and Trust Company | |
| 1989-09-29 | Acquired The Bank of Lake Placid (9415) in LAKE PLACID, NY | |
| 1989-09-29 | Acquired The First National Bank of Hancock (7089) in HANCOCK, NY | |
| 1989-09-29 | Acquired Hayes National Bank (7006) in CLINTON, NY | |
| 1989-09-29 | Acquired The Fulton County National Bank and Trust Company (7076) in GLOVERSVILLE, NY | |
| 1995-06-01 | Changed name to NBT Bank, National Association | |
| 2001-03-16 | Acquired Pennstar Bank, National Association (7549) in LAKE ARIEL, PA | |
| 2001-06-01 | Acquired The First National Bank of Northern New York (7224) in NORFOLK, NY | |
| 2001-11-08 | Acquired Central National Bank, Canajoharie (6984) in CANAJOHARIE, NY | |
| 2006-02-10 | Acquired City National Bank and Trust Company (7075) in GLOVERSVILLE, NY | |
| 2009-06-17 | Moved bank headquarters from NORWICH, NY to WHITNEY POINT, NY | |
| 2009-09-18 | Moved bank headquarters from WHITNEY POINT, NY to FRIENDSVILLE, PA | |
| 2011-03-11 | Moved bank headquarters from FRIENDSVILLE, PA to WHITNEY POINT, NY | |
| 2011-05-06 | Moved bank headquarters from WHITNEY POINT, NY to NORWICH, NY | |
| 2012-06-09 | Acquired Hampshire First Bank (58394) in MANCHESTER, NH | |
| 2013-03-09 | Acquired Alliance Bank, National Association (7237) in SYRACUSE, NY |