Avoid the stress of overpaying for a stock or missing an opportunity by using the right tools and insights to evaluate Old Second Bancorp, Inc. before investing.

In this article, we go over a few key elements for understanding Old Second Bancorp, Inc.’s stock price such as:

• Old Second Bancorp, Inc.’s current stock price and volume
• Why Old Second Bancorp, Inc.’s stock price changed recently
• Upgrades and downgrades for OSBC from analysts
• OSBC’s stock price momentum as measured by its relative strength

About Old Second Bancorp, Inc. (OSBC)

Before we jump into Old Second Bancorp, Inc.’s stock price, history, target price and what caused it to recently dip, let’s take a look at some background.

Old Second Bancorp, Inc. operates as the bank holding company for Old Second National Bank that provides community banking services in the United States. The company provides deposit products, including consumer and business checking, NOW, money market, savings, and other time deposit accounts, as well as certificates of deposit and individual retirement accounts. It also offers lending products, such as commercial and industrial loans; commercial real estate loans; multifamily loans; construction and development loans; residential real estate loans, such as residential first mortgage and second mortgage loans; home equity lines of credit; consumer loans, including motor vehicle, home improvement, and signature loans; installment and agricultural loans; lease financing receivables and overdraft checking; and safe deposit operations. In addition, the company provides online and mobile banking; corporate cash management products, including remote and mobile deposits capture, investment sweep accounts, zero balance accounts, automated tax payments, automatic teller machines access, telephone banking, lockbox accounts, automated clearing house transactions, account reconciliation, controlled disbursement, detail and general information reporting, foreign and domestic wire transfers, and vault services for currency and coin; and investment, agency, and custodial services for individual, corporate, and not-for-profit clients. The company was founded in 1871 and is headquartered in Aurora, Illinois.

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Old Second Bancorp, Inc.’s Stock Price as of Market Close

As of July 31, 2026, 4:00 PM, CST, Old Second Bancorp, Inc.’s stock price was $25.290.

Old Second Bancorp, Inc. is down 0.2% from its previous closing price of $25.340.

During the last market session, Old Second Bancorp, Inc.’s stock traded between $24.940 and $25.350. Currently, there are approximately 52.45 million shares outstanding for Old Second Bancorp, Inc..

Old Second Bancorp, Inc.’s price-earnings (P/E) ratio is currently at 15.1, which is high compared to the Banks industry median of 12.9. The price-earnings ratio gauges market expectation of future performance by relating a stock’s current share price to its earnings per share.

Old Second Bancorp, Inc. Stock Price History

Old Second Bancorp, Inc.’s (OSBC) price is currently up 8.45% so far this month.

During the month of July, Old Second Bancorp, Inc.’s stock price has reached a high of $25.660 and a low of $22.600.

Over the last year, Old Second Bancorp, Inc. has hit prices as high as $25.665 and as low as $16.425. Year to date, Old Second Bancorp, Inc.’s stock is up 29.69%.

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What Caused Old Second Bancorp, Inc. Stock’s Price to Dip?

Stock prices are primarily based on seller supply and buyer demand. But have you ever wondered about what other factors affect a stock's price?

When an analyst changes their opinion of a stock by upgrading or downgrading their rating, it often leads to a sudden stock price adjustment. As of July 31, 2026, there was 1 analyst who downgraded Old Second Bancorp, Inc.’s stock and 0 analysts who upgraded over the last month.

Additionally, you'll want to evaluate Old Second Bancorp, Inc.’s financial health and valuation. Investors can use AAII's Value Grade, which combines six key valuation metrics like P/E and P/S ratios for a comprehensive analysis to conduct analysis on Old Second Bancorp, Inc.’s valuation and financial health. This approach mitigates the limitations of single-metric evaluations.

Old Second Bancorp, Inc.’s current valuation based on AAII’s Value Grade is a C, which means it is considered to be Average.

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Lastly, news and media coverage as well as recent press reports about the company or its industry may cause stock prices to fluctuate. You can check out the most recent news articles about Old Second Bancorp, Inc. (OSBC) by visiting AAII Stock Evaluator.

Relative Price Strength of Old Second Bancorp, Inc.

Relative price strength measures a stock's performance against the market, helping investors identify stocks that are outperforming benchmarks.

For AAII’s Momentum Grade, a weighted relative price strength is calculated. Follow this link to learn more about the Momentum Grade.

As of July 31, 2026, Old Second Bancorp, Inc. has a weighted four-quarter relative price strength of 8.44%, which translates to a Momentum Score of 79 and is considered to be Strong.

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Old Second Bancorp, Inc. Stock Price: Bottom Line

As of July 31, 2026, Old Second Bancorp, Inc.’s stock price is $25.290, which is down 0.2% from its previous closing price.

AAII advises against making stock decisions based solely on price or past returns. Instead, consider a variety of metrics, fundamentals, and analytics to evaluate a stock like Old Second Bancorp, Inc. stock prices are influenced by market supply and demand and offer just a snapshot of a company's overall health.

Subscribing to AAII's A+ Investor provides access to comprehensive analytics and insights for confident investing.