First Keystone, the holding company of First Keystone Bank, has entered into a definitive agreement and plan of merger with Bryn Mawr Bank, the holding company for The Bryn Mawr Trust Company .

Pursuant to the terms of the merger agreement, the company will be merged with and into Bryn Mawr Bank, with Bryn Mawr Bank Corporation surviving the merger. Concurrent with the Merger, First Keystone Bank will merge with and into Bryn Mawr Trust, with Bryn Mawr Trust being the surviving bank.

Donald Guthrie, chairman of the board of the company and First Keystone Bank, said: “Bryn Mawr Bank, a premier company, and a high performing, well-managed institution which will provide our shareholders with significant upside potential on a long-term basis.

“We are pleased to offer our customers the expanded products and services and larger branch network that will be provided upon our combination with Bryn Mawr Bank. Much like First Keystone, Bryn Mawr Bank is a loyal citizen focused on the vitality of the communities they serve.”