NB Bancorp Inc (NASDAQ: NBBK) is a community banking company that operates through its subsidiary Needham Bank, taking deposits from the general public and deploying those funds into a diversified loan portfolio. Revenue is generated primarily through net interest income, the spread between interest earned on loans and securities and interest paid on deposits and borrowings. The bank is headquartered in Needham, Massachusetts, completed a mutual-to-stock conversion and IPO in December 2023, and acquired Provident Bancorp and BankProv, growing total assets to $7.01 billion as of December 31, 2025. At December 31, 2025, the loan portfolio totaled approximately $5.99 billion, with commercial real estate and multifamily loans at $2.44 billion (40.7%), one-to-four-family residential and home equity loans at $1.33 billion (22.2%), commercial and industrial loans at $1.01 billion (16.8%), and construction and land development loans at $730.6 million (12.2%). Total interest income on loans was $315.0 million for the year ended December 31, 2025, at an average yield of 6.67%.
- Revenue model
- Net interest income from loans and investment securities, with average interest-earning assets of $5.21 billion yielding 6.44% for the year ended December 31, 2025. Loan interest income was $315.0 million and securities interest income was $9.5 million for the same period. The bank funds its loan portfolio primarily through retail deposits and, secondarily, through Federal Home Loan Bank of Boston advances, which totaled $196.2 million outstanding as of December 31, 2025.
- Products and services
- Loan products: commercial real estate and multifamily loans, one-to-four-family residential mortgage loans, home equity loans and lines of credit, construction and land development loans (including speculative residential construction), commercial and industrial loans (Small Business including SBA 7(a), SBA Express Lines of Credit, 504 Loans, and Massachusetts Capital Access Program; Middle Market; and Structured Finance for cannabis, solar, and bridge financing), mortgage warehouse loans, consumer loans, and enterprise value/business acquisition loans ($184.9 million as of December 31, 2025). Deposit products: certificates of deposit, IRAs, money market accounts, savings accounts, demand deposit accounts, and interest-bearing and noninterest-bearing checking accounts. Investment securities: U.S. Treasury and federal agency securities, mortgage-backed securities, and corporate bonds.
- Customers and end markets
- Retail depositors in the Greater Boston area and surrounding communities. Commercial borrowers segmented by revenue size: Small Business (up to $10 million in annual revenues, SBA-eligible), Middle Market ($10 million to $50 million in revenues, including manufacturers, distributors, importers, exporters, medical practices, CPA firms, and law firms), and Structured Finance (over $50 million in revenues, with recent concentration in cannabis and solar industries). As of December 31, 2025, approximately 96.4% of Small Business and 91.3% of Middle Market commercial and industrial loan exposure was to borrowers headquartered in the primary market area.
- Value-chain role
- Balance sheet lender and deposit-taking institution. Originates and holds loans on its own balance sheet rather than operating a significant originate-to-distribute model. Funded primarily by retail deposits and FHLB advances. Operates as a bank holding company following its December 2023 IPO conversion from mutual savings bank form.
- Geographic exposure
- Primary market area is the Greater Boston metropolitan area and surrounding communities, generally within a 100-mile radius of Needham, Massachusetts, including eastern Connecticut, southern New Hampshire, and Rhode Island. As of December 31, 2025, the vast majority of commercial and industrial loan exposure was within this primary market area.
