NB Bancorp, Inc. Common Stock (NBBK) Stock

NB Bancorp, Inc. Common Stock (NBBK) is a Financials stock trading at $22.60 (as of 2026-09-02), with a market capitalization of $990.30M and a trailing P/E of 16.7. Figures are sourced from first-party U.S. SEC EDGAR filings and market data.

NB Bancorp, Inc. is a bank holding company for Needham Bank, providing banking products and services to customers in the Greater Boston area and nearby communities across Massachusetts, eastern Connecticut, southern New Hampshire, and Rhode Island. It offers deposit accounts, loans (including real estate and home equity products), and investment in U.S. government-related and municipal and corporate securities.

Understand NB Bancorp, Inc. Common Stock: how it makes money

Needham Bank (via NB Bancorp) is a community lender in Greater Boston, earning spread income by funding commercial and residential real estate loans with local deposits. Its $4.5 billion loan book is concentrated in New England, growing through deposit gathering and yield expansion rather than new-branch openings.

Profit equals the spread between 6.65% loan yields and 3.11% deposit costs, with credit losses under 1% of the book keeping most of that spread intact.

Business quality (Strong): A focused and clean balance sheet: 0.91% charge-off rate on a $4.5B book, 53.19% efficiency ratio, and 24.6% operating margin. The 16.7x P/E (29% above the 13x sector average) prices in continued outperformance.

Valuation: At 17× earnings, NBBK trades 29% above the Banking average (13×).

Bull case

  • Funding engine pulling ahead: Quarterly revenue of $100M grew 40% YoY, underpinned by annualized deposit growth of 27.9% that keeps feeding a $4.5B loan book without heavy reliance on expensive wholesale funding (brokered deposits at just $570M).
  • Credit book barely leaking: The annualized net charge-off rate sits at 0.91% on the $4.5B net loan portfolio, meaning the Boston commercial and residential real estate book is generating very little actual loss relative to its size.

Bear case

  • Priced above the sector: At 16.7x earnings, NBBK trades at a 29% premium to the 13x banking industry average, so any deceleration in loan growth or margin compression compresses the multiple before it hits earnings.
Valuation — source: SEC EDGAR (first-party)
Price$22.60
Market Cap$990.30M
P/E Ratio16.7
EV / EBITDA6.9
Price / Book1.18
Price / Sales2.50
FCF Yield5.8%
DCF Value (model)$14.74
DCF Upside vs Price-34.8%
Profitability & Growth — source: SEC EDGAR
Revenue (TTM)$335.75M
Net Margin15.0%
Revenue Growth (YoY)40.0%
EPS Growth (YoY)35.9%
FCF Growth (YoY)19.9%
Valuation vs Sector & Industry
Stock P/E16.7
Sector P/E (Financials)14.9
Industry P/E (Banking)12.7
vs Sector12.2%
vs Industry31.8%
Smart-Money Activity — SEC Form 4 / 13F / Congressional disclosures
Top Institutional HolderBlackRock, Inc. ($64.98M)
Institutional Holders Tracked10
Company
SectorFinancials
IndustryBanking
CEOJoseph Campanelli
Employees376
CountryUS
IPO Date2023-12-29

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NBBK earnings history · NBBK institutional & insider holders · NBBK KPIs & operating metrics · NBBK financials · NBBK investor presentations & press releases · NBBK SEC filings · NBBK peers · Congress trades · Insider trades · Short interest · Stock screener

Data as of 2026-09-02.

Figures sourced from U.S. Securities and Exchange Commission (SEC EDGAR) filings and market data. Not personalized investment advice.