 BOSTON MEDFORD, Mass.--BUSINESS WIRE--Eastern Bankshares, Inc. Eastern Nasdaq Global Select Market: EBC, the stock holding company for Eastern Bank, and Century Bancorp, Inc. Nasdaq: CNBKA Century, the stock holding company for Century Bank and Trust Company Century Bank, today jointly announced they have entered into a definitive all-cash merger agreement with an aggregate transaction value of 642 million. This in-market transaction comes less than six months after Eastern 