Old Second Bancorp stock (US6802771031): regional lender navigates rate pressures after latest earnings

Old Second Bancorp has reported fresh quarterly figures and is navigating a tougher interest-rate landscape for US regional banks. What the latest numbers reveal about loan growth, margins and risks for this Illinois-focused lender.

Old Second Bancorp has recently released new quarterly results that highlight how the Illinois-based regional lender is coping with the current US interest-rate environment, marked by slower loan growth and margin pressure across many community banks, according to a company earnings release published in late April 2025 on its investor relations site (Old Second Bancorp IR as of 04/25/2025).

In that update for the first quarter of 2025, management reported key figures on net income, loan balances and deposit mix, providing investors with a snapshot of how the franchise is faring amid sticky deposit costs and heightened competition for funding, as summarized by coverage from a major US financial newswire on the same day (Reuters as of 04/25/2025).

As of: 17.05.2026

By the editorial team – specialized in equity coverage.

At a glance

• Name: OSBC
• Sector/industry: Regional banking, financial services
• Headquarters/country: Aurora, Illinois, United States
• Core markets: Retail and commercial banking in the Chicago metropolitan area and surrounding Illinois markets
• Key revenue drivers: Net interest income from loans and securities, fee income from treasury management, mortgage and other banking services
• Home exchange/listing venue: Nasdaq (ticker: OSBC)
• Trading currency: US dollar (USD)

Old Second Bancorp: core business model

Old Second Bancorp operates as the holding company for Old Second National Bank, a long-established community and regional bank serving individuals, small businesses and middle-market clients in northern Illinois. Its model centers on gathering local deposits and redeploying them into loans, while maintaining a relationship-driven approach.

The bank’s balance sheet is primarily composed of commercial real estate loans, commercial and industrial facilities, residential mortgages and consumer lending, complemented by an investment securities portfolio that supports liquidity and interest income. Fee-based services such as cash management, card services and wealth-related offerings provide additional, though smaller, revenue streams.

By focusing on its regional footprint rather than nationwide expansion, Old Second Bancorp aims to leverage local market knowledge and long-standing client connections. This localized approach can support stable funding from core deposits, but it also means that the bank’s fortunes are closely linked to economic conditions in the Chicago area and broader Midwest.

Main revenue and product drivers for Old Second Bancorp

For Old Second Bancorp, net interest income is the primary engine of profitability. The spread between interest earned on loans and securities and interest paid on deposits and borrowings, known as net interest margin, is highly sensitive to Federal Reserve policy and competitive pricing for deposits. Elevated short-term rates have recently increased funding costs for many US regional banks.

On the lending side, commercial real estate and commercial and industrial customers represent important segments. Loan demand in these categories is influenced by business investment, local employment trends and property market dynamics in Illinois. Residential mortgages and home equity lines contribute additional interest income and help diversify the credit portfolio by borrower type and collateral.

Non-interest income, including service charges on deposit accounts, interchange fees, mortgage banking revenue and treasury management fees, offers a partial buffer when net interest margin comes under pressure. However, for a bank of Old Second Bancorp’s size, these activities are typically incremental rather than dominant, making the institution particularly exposed to shifts in the rate cycle and deposit competition.

Conclusion

Old Second Bancorp remains a regionally focused US lender whose earnings are largely shaped by interest-rate trends and local economic conditions in Illinois. Recent quarterly figures underline both the resilience of its community banking model and the challenges of sustaining margins amid competitive deposit markets. For US investors following regional banks, the stock illustrates how balance-sheet mix, funding stability and credit quality can drive outcomes in a shifting rate cycle without the scale advantages of national players.

Disclaimer: This article does not constitute investment advice. Stocks are volatile financial instruments.