HarborOne Bank was founded in 1909 in Brockton, Massachusetts. In 2007, it merged with Marlborough Savings, and in 2008 they opened their first branch in Canton. In 2012, HarborOne Bank opened its first branch in Rhode Island, expanding its footprint across New England. In 2013, HarborOne Bank converted to a mutual savings bank. In 2016, HarborOne Bancorp went public, becoming the first Massachusetts public mutual holding company (MHC).
