The bank achieved a 30.0% year-over-year increase in net interest income by 2026Q1, while operational efficiency improved to a 45.3% efficiency ratio.
| Metric | TTM | Dec'25 | Dec'24 | Dec'23 | Dec'22 | Dec'21 | Dec'20 | Dec'19 | Dec'18 | Dec'17 | Dec'16 | Dec'15 | Dec'14 | Dec'13 | Dec'12 | Dec'11 | Dec'10 | Dec'09 | Dec'08 | Dec'07 | Dec'06 | Dec'05 | Dec'04 | Dec'03 | Dec'02 | Dec'01 | Dec'00 | Dec'99 | Dec'98 | Dec'97 | Dec'96 |
|---|
| Net Interest Income | 310.55M | 291.84M | 239.36M | 250.01M | 205.22M | 96.26M | 91.27M | 96.16M | 90.47M | 74.51M | 63.11M | 58.78M | 56.75M | 54.95M | 59.04M | 63.66M | 78.36M | 86.91M | 89.43M | 68.6M | 71.2M | 74M | 68.36M | 62.38M | 57.48M | 49.5M | 41.33M | 37.84M | 35.9M | 34.1M | 31.9M |
| NII Growth % | 111.43% | 21.93% | -4.26% | 21.83% | 113.2% | 5.47% | -5.09% | 6.29% | 21.42% | 18.07% | 7.36% | 3.58% | 3.28% | -6.93% | -7.26% | -18.76% | -9.84% | -2.82% | 30.37% | -3.65% | -3.78% | 8.25% | 9.59% | 8.51% | 16.12% | 19.78% | 9.22% | 5.39% | 5.28% | 6.9% | 11.93% |
| Net Interest Margin % | 4.53% | 4.23% | 4.24% | 4.37% | 3.49% | 1.55% | 3% | 3.65% | 3.38% | 3.13% | 2.8% | 2.83% | 2.75% | 2.74% | 2.89% | 3.28% | 3.69% | 3.35% | 3% | 2.58% | 2.9% | 3.13% | 3.25% | 3.39% | 3.57% | 3.71% | 3.6% | 3.79% | 3.54% | 3.6% | 3.85% |
| Interest Income | 379.31M | 354.05M | 295.63M | 290.05M | 215.54M | 104.71M | 103.73M | 114.99M | 107.15M | 87.14M | 73.05M | 67.86M | 67.73M | 68.74M | 74.78M | 85.13M | 106.43M | 132.43M | 157.84M | 155.74M | 142.03M | 120.22M | 97.4M | 87.84M | 85.49M | 84.79M | 77.14M | 66.99M | 68.1M | 65.2M | 59.7M |
| Interest Expense | 68.76M | 62.22M | 56.27M | 40.04M | 10.32M | 8.45M | 12.46M | 18.84M | 16.68M | 12.63M | 9.94M | 9.08M | 10.98M | 13.79M | 15.73M | 21.47M | 28.07M | 45.51M | 68.41M | 87.14M | 70.83M | 46.22M | 29.04M | 25.47M | 28.01M | 35.29M | 35.82M | 29.15M | 32.2M | 31.1M | 27.8M |
| Loan Loss Provision | 31.65M | 24.55M | 12.75M | 16.5M | 6.55M | 4.33M | 10.41M | 1.6M | 1.23M | 1.8M | 750K | -4.4M | -3.3M | -8.55M | 6.28M | 8.89M | 89.67M | 96.72M | 30.32M | 1.19M | 1.24M | 353K | -2.9M | 3.25M | 3.81M | 3.84M | 1.38M | 930K | 1.2M | 1.3M | 700K |
| Non-Interest Income | 46.43M | 42.91M | 40.54M | 30.98M | 39.7M | 37.18M | 35.78M | 34.45M | 29.84M | 29.4M | 27.45M | 29.2M | 28.02M | 30.05M | 35.98M | 34.87M | 45.16M | 43.27M | 35.34M | 31.86M | 28.71M | 28.15M | 25.91M | 29.23M | 25.28M | 22.3M | 16.57M | 18.56M | 20.4M | 14M | 14M |
| Non-Interest Income % | 10.91% | 10.81% | 12.06% | 9.65% | 15.56% | 26.2% | 25.64% | 23.05% | 21.78% | 25.23% | 27.32% | 30.09% | 29.26% | 30.42% | 32.48% | 29.06% | 29.79% | 24.63% | 18.29% | 16.98% | 16.81% | 18.97% | 21.01% | 24.97% | 22.82% | 20.82% | 17.68% | 21.69% | 23.05% | 17.68% | 19% |
| Total Revenue | 425.74M | 396.97M | 336.17M | 321.03M | 255.24M | 141.89M | 139.51M | 149.44M | 136.99M | 116.54M | 100.5M | 97.06M | 95.75M | 98.78M | 110.75M | 120.01M | 151.59M | 175.7M | 193.19M | 187.6M | 170.74M | 148.37M | 123.31M | 117.07M | 110.77M | 107.09M | 93.71M | 85.55M | 88.5M | 79.2M | 73.7M |
| Revenue Growth % | 106.46% | 18.09% | 4.72% | 25.77% | 79.89% | 1.71% | -6.65% | 9.09% | 17.55% | 15.96% | 3.54% | 1.37% | -3.07% | -10.81% | -7.71% | -20.84% | -13.72% | -9.05% | 2.98% | 9.87% | 15.07% | 20.32% | 5.33% | 5.69% | 3.43% | 14.28% | 9.54% | -3.34% | 11.74% | 7.46% | 24.07% |
| Non-Interest Expense | 206.72M | 199.44M | 154.19M | 140.08M | 146.82M | 101.24M | 79.22M | 77.15M | 75.14M | 67.81M | 65.31M | 68.03M | 72.17M | 81.7M | 88.81M | 96.14M | 100.64M | 144.63M | 80.31M | 66.47M | 65.14M | 60.5M | 57.61M | 54.17M | 48.06M | 41.48M | 37.09M | 37.28M | 39.1M | 33.2M | 33.3M |
| Efficiency Ratio | 48.55% | 50.24% | 45.87% | 43.63% | 57.52% | 71.36% | 56.79% | 51.62% | 54.85% | 58.19% | 64.98% | 70.08% | 75.37% | 82.71% | 80.18% | 80.12% | 66.39% | 82.32% | 41.57% | 35.43% | 38.15% | 40.78% | 46.72% | 46.28% | 43.38% | 38.73% | 39.58% | 43.57% | 44.18% | 41.92% | 45.18% |
| Operating Income | 118.61M | 110.75M | 112.96M | 124.41M | 91.55M | 27.87M | 37.41M | 51.86M | 43.94M | 34.3M | 24.5M | 24.36M | 15.9M | 11.84M | -72K | -6.5M | -66.78M | -111.16M | 14.15M | 32.79M | 33.53M | 41.3M | 39.56M | 34.18M | 30.9M | 26.49M | 19.43M | 18.19M | 16M | 13.6M | 11.9M |
| Operating Margin % | 27.86% | 27.9% | 33.6% | 38.75% | 35.87% | 19.64% | 26.81% | 34.7% | 32.07% | 29.43% | 24.38% | 25.1% | 16.6% | 11.99% | -0.07% | -5.41% | -44.05% | -63.27% | 7.32% | 17.48% | 19.64% | 27.83% | 32.09% | 29.19% | 27.89% | 24.73% | 20.73% | 21.26% | 18.08% | 17.17% | 16.15% |
| Operating Income Growth % | - | -1.95% | -9.21% | 35.89% | 228.52% | -25.51% | -27.86% | 18.03% | 28.09% | 39.99% | 0.59% | 53.24% | 34.23% | 16548.61% | 98.89% | 90.27% | 39.92% | -885.76% | -56.86% | -2.19% | -18.81% | 4.37% | 15.77% | 10.62% | 16.65% | 36.35% | 6.8% | 13.68% | 17.65% | 14.29% | -1.65% |
| Pretax Income | 115.61M | 107.75M | 112.96M | 124.41M | 91.55M | 27.87M | 37.41M | 51.86M | 43.94M | 34.3M | 24.5M | 24.36M | 15.9M | 11.84M | -72K | -6.5M | -66.78M | -111.16M | 14.15M | 32.79M | 33.53M | 41.3M | 39.56M | 34.18M | 30.9M | 26.49M | 19.43M | 18.19M | 16M | 13.6M | 11.9M |
| Pretax Margin % | 27.16% | 27.14% | 33.6% | 38.75% | 35.87% | 19.64% | 26.81% | 34.7% | 32.07% | 29.43% | 24.38% | 25.1% | 16.6% | 11.99% | -0.07% | -5.41% | -44.05% | -63.27% | 7.32% | 17.48% | 19.64% | 27.83% | 32.09% | 29.19% | 27.89% | 24.73% | 20.73% | 21.26% | 18.08% | 17.17% | 16.15% |
| Income Tax | 29.55M | 27.44M | 27.69M | 32.68M | 24.14M | 7.82M | 9.58M | 12.4M | 9.92M | 19.16M | 8.82M | 8.98M | 5.76M | -70.24M | 0 | 0 | 41.87M | -45.57M | 2.32M | 8.82M | 9.87M | 13.61M | 13.28M | 12.07M | 10.75M | 9.26M | 5.95M | 5.78M | 5M | 4M | 3.6M |
| Effective Tax Rate % | 25.56% | 25.47% | 24.52% | 26.27% | 26.37% | 28.07% | 25.62% | 23.92% | 22.59% | 55.87% | 35.99% | 36.85% | 36.24% | -593.11% | 0% | 0% | -62.69% | 41% | 16.42% | 26.9% | 29.44% | 32.96% | 33.56% | 35.31% | 34.8% | 34.97% | 30.65% | 31.78% | 31.25% | 29.41% | 30.25% |
| Net Income | 86.06M | 80.31M | 85.26M | 91.73M | 67.41M | 20.04M | 27.82M | 39.45M | 34.01M | 15.14M | 15.68M | 15.38M | 10.14M | 82.08M | -72K | -6.5M | -108.65M | -65.59M | 11.82M | 23.97M | 23.66M | 27.68M | 26.29M | 22.11M | 20.15M | 17.22M | 13.47M | 12.41M | 11M | 9.6M | 8.3M |
| Net Margin % | 20.22% | 20.23% | 25.36% | 28.57% | 26.41% | 14.13% | 19.95% | 26.4% | 24.83% | 12.99% | 15.61% | 15.85% | 10.59% | 83.1% | -0.07% | -5.41% | -71.67% | -37.33% | 6.12% | 12.78% | 13.86% | 18.66% | 21.32% | 18.88% | 18.19% | 16.08% | 14.38% | 14.5% | 12.43% | 12.12% | 11.26% |
| Net Income Growth % | 2.72% | -5.81% | -7.05% | 36.09% | 236.29% | -27.96% | -29.48% | 16% | 124.68% | -3.48% | 1.94% | 51.79% | -87.65% | 114106.94% | 98.89% | 94.02% | -65.65% | -654.7% | -50.68% | 1.34% | -14.55% | 5.31% | 18.9% | 9.74% | 16.97% | 27.85% | 8.57% | 12.8% | 14.58% | 15.66% | -5.68% |
| Net Income (Continuing) | 86.06M | 80.31M | 85.26M | 91.73M | 67.41M | 20.04M | 27.82M | 39.45M | 34.01M | 15.14M | 15.68M | 15.38M | 10.14M | 82.08M | -72K | -6.5M | -108.65M | -65.59M | 11.82M | 23.97M | 23.66M | 27.68M | 26.29M | 22.11M | 20.15M | 17.22M | 13.47M | 12.41M | 11M | 9.6M | 8.3M |
| EPS (Diluted) | 1.61 | 1.62 | 1.87 | 2.02 | 1.49 | 0.65 | 0.92 | 1.30 | 1.12 | 0.50 | 0.53 | 0.46 | 0.46 | 5.45 | -0.36 | -0.79 | -8.03 | -4.60 | 0.86 | 1.89 | 1.75 | 2.03 | 1.94 | 1.56 | 1.35 | 1.11 | 0.86 | 0.77 | 0.34 | 0.11 | 0.10 |
| EPS Growth % | -8.2% | -13.37% | -7.43% | 35.57% | 129.23% | -29.35% | -29.23% | 16.07% | 124% | -5.66% | 15.22% | 0% | -91.56% | 1613.89% | 54.43% | 90.16% | -74.57% | -634.88% | -54.5% | 8% | -13.79% | 4.64% | 24.36% | 15.56% | 21.62% | 29.07% | 11.69% | 126.47% | 209.09% | 14.23% | -82.8% |
| EPS (Basic) | - | 1.64 | 1.90 | 2.05 | 1.51 | 0.66 | 0.94 | 1.32 | 1.14 | 0.51 | 0.53 | 0.46 | 0.46 | 5.45 | -0.36 | -0.79 | -8.03 | -4.60 | 0.87 | 1.92 | 1.77 | 2.05 | 1.96 | 1.57 | 1.36 | 1.12 | 0.86 | 0.77 | 0.34 | 0.11 | 0.10 |
| Diluted Shares Outstanding | 53.48M | 53.48M | 45.64M | 45.4M | 45.21M | 30.74M | 30.17M | 30.42M | 30.31M | 30.04M | 29.84M | 29.73M | 25.77M | 14.11M | 14.21M | 14.22M | 14.1M | 13.91M | 13.69M | 12.68M | 13.52M | 13.64M | 13.55M | 14.22M | 14.98M | 15.46M | 15.69M | 16.22M | 16.27M | 16.26M | 15.66M |
Chicago CRE concentration risk
As reported in recent financial filings, Old Second Bancorp achieved a notable 30.0% year-over-year growth in net interest income by 2026Q1, signaling that the firm's recent expansion efforts are successfully translating into higher interest-earning capacity despite a challenging and volatile interest rate environment for regional lenders.
The sharp acceleration in NII suggests that the bank has effectively leveraged its expanded asset base following recent acquisitions. Investors should monitor whether this growth trajectory remains sustainable as the benefit of initial integration tailwinds begins to normalize against potential deposit beta pressures.
Based on the provided income statement data, the efficiency ratio fluctuated significantly, reaching 53.2% in 2025Q3 before improving to 45.3% by 2026Q1, which suggests that management is successfully navigating the operational complexities and cost structures inherent in their recent inorganic growth and branch-heavy business model.
The volatility in the efficiency ratio appears tied to the timing of acquisition-related expenses and subsequent cost-rationalization efforts. Maintaining this ratio below the 45% threshold will be critical for demonstrating long-term operating leverage to shareholders as the bank scales its digital and physical infrastructure.
According to the quarterly income statement, the provision for loan losses spiked to $19.7 million in 2025Q3, a sharp departure from the $2.4 million recorded in 2025Q1, indicating that the bank is proactively adjusting its credit reserves in response to evolving economic forecasts and potential asset quality deterioration.
This significant provision spike suggests a conservative approach to credit risk management, likely reflecting heightened sensitivity to the Chicago-area commercial real estate market. Analysts should investigate whether this elevated provisioning level represents a permanent shift in the bank's risk appetite or a temporary reaction to specific portfolio stress.
As indicated by the financial data, non-interest income consistently contributed between 10% and 12% of total revenue over the last ten quarters, providing a necessary, capital-light buffer that helps stabilize the bank's earnings profile against the inherent cyclicality of interest-rate-driven net interest income fluctuations.
The reliance on wealth management and trust services appears to be a strategic stabilizer that mitigates the bank's exposure to pure lending volatility. This fee-based revenue stream warrants further investigation to determine its growth potential and whether it can scale independently of the bank's primary commercial lending operations.
Quick answers to the most common questions about buying OSBC stock.
Old Second Bancorp, Inc. (OSBC) is profitable, generating $80.3M in net income for the fiscal year ending 2025 with a net profit margin of 20.2%.
Old Second Bancorp, Inc. (OSBC) reported an operating income of $110.8M, resulting in an operating profit margin of 27.9%. This margin reflects the operational efficiency of the business before interest and taxes.
Old Second Bancorp, Inc. (OSBC) generated $310.2M in gross profit for the year, representing a gross profit margin of 78.1%. This demonstrates the company's core pricing power and production efficiency.