Up to 35,650,000 Shares (Subject to increase to up to 40,997,500 shares) NB BANCORP, INC. (a Maryland corporation) Common Stock (par value $0.01 per share) AGENCY AGREEMENT October 12, 2023Agency Agreement • October 12th, 2023 • NB Bancorp, Inc. • Savings institutions, not federally chartered • New York
