Old Second Bancorp (OSBC) Stock Chart & Stock Price History $18.53 -0.04 (-0.22%) Closing price 04:00 PM EasternExtended Trading$18.53 0.00 (0.00%) As of 06:27 PM Eastern Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Polygon.io. Learn more. Add Compare Share Share Chart Stock AnalysisAnalyst ForecastsChartCompetitorsDividendEarningsFinancialsHeadlinesInsider TradesOptions ChainOwnershipSEC FilingsShort InterestTrendsBuy This Stock Old Second Bancorp Stock Price Performance The Old Second Bancorp (OSBC) stock chart highlights key performance trends across multiple timeframes. Over the last 12 months, the stock's price has increased 10.10%, with a year-to-date return of 4.22%. In the past month, the stock has increased 4.51%, reflecting recent market activity. As of the latest close, Old Second Bancorp traded at $18.57 with a market cap of $977.71 million and volume of 152,394 shares. Five years ago, the stock traded at $8.29, representing a 123.52% increase over that period. At the time, it had a market cap of $242.63 million and a volume of 65,650 shares. Receive OSBC Stock News and Ratings via EmailSign-up to receive the latest news and ratings for Old Second Bancorp and its competitors with MarketBeat's FREE daily newsletter. Subscribe Now View SMS TermsBy entering your phone number and clicking the sign-up button, you agree to receive periodic text messages from MarketBeat at the phone number you submitted, including texts that may be sent using an automatic telephone dialing system. Message and data rates may apply. Message frequency will vary. Messages will consist of stock alerts, news stories, and partner advertisements/offers. Consent is not a condition of the purchase of any goods or services. Text HELP for help/customer support. 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Read our full terms of service and privacy policy. 5 Day Performance+0.76%1 Month Performance+4.51%3 Month Performance+11.76%Year-To-Date Performance+4.22%1 Year Performance+10.10%5 Year Performance+123.52% OSBC Stock Chart for Thursday, August, 28, 2025 OSBC Chart by TradingView Old Second Bancorp Stock Price History Daily Weekly Monthly Yearly Time Frame Custom Range 1 Month 3 Months 6 Months Year-to-Date 1 Year 3 Year 5 Year Time Frame Start Date End Date Export to Excel DateOpening PriceClosing PriceHighLowVolumeMarket Capitalization08/28/2025$18.57$18.53-0.22%$18.62$18.45147,411 shs$975.61 million08/27/2025$18.40$18.57+0.92%$18.61$18.22152,394 shs$977.71 million08/26/2025$18.17$18.40+1.27%$18.51$18.16173,556 shs$968.76 million08/25/2025$18.39$18.17-1.20%$18.36$18.13125,031 shs$956.65 million08/22/2025$17.59$18.39+4.55%$18.42$17.68326,214 shs$968.23 million08/21/2025$17.56$17.59+0.17%$17.64$17.36148,190 shs$926.11 million08/20/2025$17.49$17.56+0.40%$17.59$17.42176,886 shs$924.53 million08/19/2025$17.61$17.49-0.68%$17.80$17.47171,421 shs$920.85 million08/18/2025$17.39$17.61+1.27%$17.64$17.32156,172 shs$927.17 million08/15/2025$17.78$17.39-2.19%$17.84$17.38160,006 shs$915.58 million Get the Latest News and Ratings for OSBC and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Old Second Bancorp and its competitors with MarketBeat's FREE daily newsletter. 08/14/2025$17.84$17.78-0.34%$17.82$17.30150,419 shs$936.12 million08/13/2025$17.56$17.84+1.59%$17.87$17.51185,429 shs$939.28 million08/12/2025$16.79$17.56+4.59%$17.57$16.87173,932 shs$924.53 million08/11/2025$16.74$16.79+0.30%$17.06$16.69112,002 shs$756.49 million08/08/2025$16.56$16.74+1.09%$16.81$16.57124,628 shs$754.24 million08/07/2025$16.81$16.56-1.49%$17.27$16.54200,425 shs$746.19 million08/06/2025$17.02$16.81-1.23%$17.20$16.80108,923 shs$757.46 million08/05/2025$16.80$17.02+1.31%$17.02$16.59272,158 shs$766.85 million08/04/2025$16.59$16.80+1.27%$17.40$16.54202,384 shs$757.01 million08/01/2025$16.97$16.59-2.24%$17.57$16.42232,866 shs$747.55 million07/31/2025$17.28$16.97-1.79%$17.23$16.95267,824 shs$764.67 million07/30/2025$17.61$17.28-1.87%$17.73$17.23298,618 shs$778.57 million07/29/2025$17.73$17.61-0.68%$17.89$17.56304,243 shs$793.51 million07/28/2025$17.85$17.73-0.67%$17.98$17.71281,293 shs$798.91 million Related Companies BUSE Stock Price Chart CATY Stock Price Chart FFBC Stock Price Chart FRME Stock Price Chart OBK Stock Price Chart OCFC Stock Price Chart STBA Stock Price Chart TOWN Stock Price Chart UBSI Stock Price Chart UVSP Stock Price Chart Receive OSBC Stock News and Ratings via EmailSign-up to receive the latest news and ratings for Old Second Bancorp and its competitors with MarketBeat's FREE daily newsletter. 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