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The price of Old Second Bancorp, Inc. (OSBC) on October 9, 2026 is 24.61 USD, -1.01% on the day. Over 52 weeks the stock traded between 16.65 USD and 26.06 USD; the price now sits 85% of the way up that range. Over the past year the price changed by +42.50%. The P/E ratio is 14.8, which is above the sector median (13.2). Market capitalization is 1.27 billion USD, rank 69 among 159 stocks of the same industry with a known capitalization.
Closing prices for 9 October 2026
Next earnings report: 28 October 2026 · Earnings calendar
Change over the period shown (line colour): +42.75 %
Old Second Bancorp, Inc. trades on Nasdaq under the ticker OSBC. The company belongs to the Financials sector. The trading history on this page starts on 22 August 2016.
Over the past 52 weeks OSBC has traded between 16.65 $ and 26.06 $. As of 9 October 2026 the price stood 84.59 % of the way from the 52-week low to the high.
Over one year OSBC shares rose 42.50 %; over six months they rose 15.49 %. Volatility over 90 days is 18.48 %. Dividends are not included: this is price change only, as of 9 October 2026.
OSBC trades at a price-to-earnings ratio of 14.8, above the sector median of 13.2. Price to sales is 3.3, above the sector median of 2.7. Price to book is 1.4, above the sector median of 1.3. Calculated from reports for the period ending 31 March 2026.
| Date | Open | High | Low | Close | Volume, shares |
|---|---|---|---|---|---|
| 9 October 2026 | 24.76 | 24.85 | 24.54 | 24.61 | 391,800 |
| 8 October 2026 | 24.65 | 24.97 | 24.46 | 24.86 | 735,700 |
| 7 October 2026 | 24.77 | 24.84 | 24.45 | 24.66 | 620,300 |
| 6 October 2026 | 25.22 | 25.32 |
The series is stated in the current share scale after splits; dividends are not included in the price
Based on the last 12 months of reports, through 31 March 2026
The sector median covers every company in the sector on the US market, loss-making ones included.
Address:37 S RIVER ST, AURORA, IL, 60507, US
Old Second Bancorp, Inc. reported revenue of 380M $ and net income of 86M $ over the last four quarters. Net margin is 22.65 %. Revenue changed by +27.44 % year over year. Earnings per share are 1.67 $. Market capitalisation is 1.3B $.
OSBC has a return on equity of 9.63 %, below the sector median of 9.80 %. Return on assets is 1.26 %, above the sector median of 1.13 %.
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| 24.95 |
| 25.05 |
| 922,400 |
| 5 October 2026 | 25.04 | 25.06 | 24.66 | 24.87 | 581,500 |
| 2 October 2026 | 24.82 | 25.20 | 24.79 | 24.95 | 722,000 |
| 1 October 2026 | 24.38 | 24.67 | 23.99 | 24.63 | 711,100 |
| 30 September 2026 | 24.64 | 24.82 | 24.29 | 24.49 | 505,100 |
| 29 September 2026 | 24.85 | 24.98 | 24.44 | 24.65 | 496,000 |
| 28 September 2026 | 24.92 | 25.03 | 24.76 | 24.85 | 467,700 |
| 25 September 2026 | 24.86 | 25.11 | 24.86 | 24.95 | 674,100 |
| 24 September 2026 | 24.55 | 24.89 | 24.44 | 24.82 | 664,900 |
| 23 September 2026 | 24.66 | 25.13 | 24.42 | 24.55 | 460,800 |
| 22 September 2026 | 24.98 | 25.15 | 24.64 | 24.65 | 375,500 |
| 21 September 2026 | 25.08 | 25.26 | 24.82 | 24.83 | 353,100 |
| 18 September 2026 | 24.80 | 25.07 | 24.59 | 24.99 | 731,100 |
| 17 September 2026 | 25.19 | 25.34 | 24.88 | 24.92 | 428,200 |
| 16 September 2026 | 25.45 | 25.53 | 24.51 | 24.98 | 558,200 |
| 15 September 2026 | 25.52 | 25.68 | 25.33 | 25.53 | 486,500 |
| 14 September 2026 | 25.50 | 25.84 | 25.46 | 25.51 | 472,500 |