NBT Bancorp Inc. Successfully Closes Merger With Alliance Financial Corporation

NBT Bancorp Inc. Successfully Closes Merger With Alliance Financial
Corporation

NORWICH, N.Y., March 8, 2013 (GLOBE NEWSWIRE) -- NBT Bancorp Inc. (NBT)
(Nasdaq:NBTB) announced today the successful closing of its previously
announced merger with Alliance Financial Corporation (Alliance) (Nasdaq:ALNC).
Under the terms of the agreement, Alliance merged with and into NBT, with NBT
being the surviving corporation of the merger. Additionally, Alliance Bank,
N.A., a wholly-owned subsidiary of Alliance, merged with and into NBT Bank,
N.A., a wholly-owned subsidiary of NBT, with NBT Bank continuing as the
surviving entity.

Under the terms of the merger agreement, each outstanding share of Alliance
common stock was converted into the right to receive 2.1779 shares of NBT
common stock. In connection with the merger, NBT will issue approximately
10,346,911 million shares of its common stock in exchange for all of the
outstanding shares of Alliance common stock.

The merger provides NBT with the addition of $1.4 billion in assets, including
$920 million in net loans held for investment, and $1.1 billion in deposits.
At December 31, 2012, NBT had assets of $6.0 billion.

Alliance Bank's 26 branches in the central New York counties of Onondaga,
Cortland, Madison, Oneida and Oswego will open as NBT Bank locations on March
11, 2013, following a weekend systems conversion. The addition of the Alliance
Bank offices will bring NBT Bank's total network of banking locations to 161
in five states, including New York, Pennsylvania, Vermont, Massachusetts and
New Hampshire.

CONTACT: Martin Dietrich
         President and CEO
         607.337.6119
        
         Michael J. Chewens
         Chief Financial Officer
         607.337.6520