Two subsidiaries of holding company Brookline Bancorp have merged into one bank.

First Ipswich Bank, which at the end of 2019 had about $466 million in assets, has merged into Brookline Bank, which had almost $5 billion in total assets at the end of last year. The merger was announced in October 2019 and finalized on Feb. 14, 2020.

The merger adds six branches on the North Shore and Cape Ann to Brookline Bank’s network, expanding its footprint to 31 locations in Greater Boston and the North Shore.

“We have been working closely with First Ipswich Bank team members for the past nine years under the Brookline Bancorp umbrella and are excited to move forward together now that they are officially part of Brookline Bank,” Darryl Fess, Brookline Bank’s president & CEO, said in a statement. “The additional locations expand our coverage in eastern Massachusetts and greatly enhance our ability to serve our personal banking and commercial clients.

The former First Ipswich locations are in Danvers, Essex, Gloucester, Ipswich, Newburyport and Rowley.

The decision by the Massachusetts Division of Banks to approve the merger noted that Brookline Bank and First Ipswich had the same consumer product offerings and similar commercial products, with no plans to change the product offerings. Brookline Bank and First Ipswich said the merger would reduce the corporate governance and compliance burden associated with maintaining the banks as separate entities, and that a combined institution could offer products and services more efficiently.

Brookline Bancorp has another subsidiary, Providence-based Bank Rhode Island, which has about $2.5 billion in total assets and 20 branch locations.