NB Bancorp (NBBK) vs Old Second Bancorp (OSBC)
Head-to-head comparison of performance, valuation, growth, profitability and dividends. Prices delayed 15 minutes; data as of Oct 8, 2026.
Summary
Old Second Bancorp (OSBC) has outperformed NB Bancorp (NBBK) over the past year, gaining 43.9% versus a gain of 28.9%. Old Second Bancorp is the larger company by market cap ($1.26 billion vs $988.1 million), about 1.3 times the size. On valuation, NB Bancorp trades at a lower forward P/E (8.6x vs 10.2x for Old Second Bancorp).
NB Bancorp offers the higher dividend yield (4.35% vs 1.09%).
Summary generated from market data by MetaCap's automated system. Methodology
Relative performance
Percent change in share price from the first common trading day shown; excludes dividends.
Head-to-head
| Metric | NBBK | OSBC |
|---|---|---|
| Share price | $22.55 | $24.86 |
| Market cap | $988.11M | $1.26B |
| 1-day change | +1.26% | +0.81% |
| YTD return | +13.77% | +27.49% |
| 1-year return | +28.93% | +43.95% |
| 5-year return | — | +87.48% |
| P/E ratio (TTM) | 14.74 | 14.13 |
| Forward P/E | 8.57 | 10.17 |
| EPS (TTM) | $1.53 | $1.76 |
| Dividend yield | 4.35% | 1.09% |
| Annual dividend | $0.98 | $0.27 |
| 52-week high | $23.47 | $26.06 |
| 52-week low | $16.84 | $16.65 |
| Distance from 52-week high | -3.92% | -4.60% |
| Analyst consensus | buy | buy |
| Avg. price target upside | +13.08% | +13.96% |
| Average volume | 306.95K | 469.85K |
| Shares outstanding | 43.82M | 50.88M |
| Employees | 526 | 1,062 |
| Sector | Financial Services | Financial Services |
| Industry | Banks - Regional | Banks - Regional |
Highlighted cells mark the higher value for growth, returns, margins and yield, and the lower value for P/E ratios. Highlighting is a mechanical comparison, not a recommendation.
Key differences
- OSBC has outperformed NBBK by 15.0 percentage points over the past year.
- NB Bancorp offers a meaningfully higher dividend yield (4.35% vs 1.09%).
About NB Bancorp
NBBK stock →NB Bancorp, Inc. focuses on operating as a bank holding company for Needham Bank that provides various banking products and services in the Greater Boston metropolitan area and surrounding communities in the United States.
Financial Services · Banks - Regional · 526 employees
About Old Second Bancorp
OSBC stock →Old Second Bancorp, Inc. operates as the bank holding company for Old Second National Bank that provides community banking services in the United States.
Financial Services · Banks - Regional · 1,062 employees
NBBK vs OSBC FAQ
Which is bigger, NB Bancorp or Old Second Bancorp?
Old Second Bancorp (OSBC) is larger, with a market capitalization of $1.26B compared with $988.11M for NB Bancorp (NBBK).
Which stock has performed better over the past year, NBBK or OSBC?
OSBC returned +43.95% over the past 12 months, compared with +28.93% for NBBK (price return, excluding dividends). Past performance does not predict future results.
Which has the lower P/E ratio, NBBK or OSBC?
OSBC has the lower trailing P/E at 14.1, versus 14.7 for NBBK. A lower P/E is not by itself a sign of a better investment; it can reflect slower expected growth or higher risk.
Which pays a higher dividend, NB Bancorp or Old Second Bancorp?
NB Bancorp has the higher yield at 4.35%, compared with 1.09% for Old Second Bancorp.
Are NB Bancorp and Old Second Bancorp in the same industry?
Yes. Both are classified in the Banks - Regional industry within the Financial Services sector.