Up to 34,500,000 Shares (Subject to increase to up to 39,675,000 shares) NB BANCORP, INC. (a Maryland corporation) Common Stock (par value $0.01 per share) AGENCY AGREEMENT August [__], 2023Agency Agreement • July 27th, 2023 • NB Bancorp, Inc. • Savings institutions, not federally chartered • New York
