NEW YORK–(BUSINESS WIRE)– #creditratingagency–KBRA assigns a senior unsecured debt rating of BBB, a subordinated debt rating of BBB-, and a short-term debt rating of K3 to Needham, Massachusetts-based NB Bancorp, Inc. (NYSE: NBBK) (“the company”). KBRA also assigns deposit and senior unsecured debt ratings of BBB+, a subordinated debt rating of BBB, and short-term deposit and debt ratings of K2 to the company’s primary subsidiary, Needham Bank (“the bank”). The Outlook for all long-term ratings is Stable. Key Cre