Old Second National Bank
OSBC Aurora, IL FDIC 3603 $5B-$10B
Quarter Ended
Q1'26
Data as of March 31, 2026
Quarterly Snapshot
Metric Q1'26 YoY Δ Q1'25
Profitability
Return on Assets (%) 1.61% +0.07 1.54%
Return on Equity (%) 12.05% -0.69 12.74%
Net Interest Margin (%) 5.19% +0.28 4.90%
Efficiency Ratio (%) 49.59% -6.19 55.78%
Pre-Provision Profit ($M) $47 +14.89 $32
Cost of Funds (%) 0.96% +0.27 0.69%
Balance Sheet
Total Assets ($M) $6,847 +1120.43 $5,726
Gross Loans ($M) $5,190 +1245.15 $3,944
Loan Growth YoY (%) 91.37% +12.13 79.24%
Total Deposits ($M) $5,601 +675.42 $4,925
Shareholders Equity ($M) $930 +230.46 $700
Tang. Book Value ($M) $769 +193.33 $576
TBV excl. AOCI ($M)** $825 +191.73 $633
Loan / Deposit Ratio (%) 91.37% +12.13 79.24%
Credit Quality
NPA / Total Assets (%) 1.11% +0.45 0.66%
Allowance / Loans (%) 1.39% 0.34% 1.05%
Net Charge-Off Ratio (%) 1.45% +0.57 0.88%
Capital
Tier 1 Capital Ratio (%) 13.80% +0.16 13.64%
Noninterest income ($12.73M) is materially above the typical range relative to net interest income. This may include one-time items. Efficiency ratio may not reflect recurring earnings power.
** TBV excl. AOCI adds back unrealised losses on AFS securities to show capital excluding mark-to-market interest rate impact.
8-Quarter Trend
Metric Q2'24 Q3'24 Q4'24 Q1'25 Q2'25 Q3'25 Q4'25 Q1'26
▁▁▁▄▅▇██ Net Interest Margin (%) 4.67% 4.69% 4.73% 4.90% 4.95% 5.14% 5.22% 5.19%
██▇▅▇▁▄▇ Return on Assets (%) 1.65% 1.68% 1.63% 1.54% 1.61% 1.32% 1.46% 1.61%
▁▂▄█▆█▇▁ Efficiency Ratio (%) 50.4% 50.9% 52.3% 55.8% 54.2% 56.4% 55.2% 49.6%
▄▆▄▁▁█▇▅ Cost of Funds (%) 0.90% 1.04% 0.91% 0.69% 0.71% 1.17% 1.07% 0.96%
▆█▅▁▁▃▃█ NPA / Assets (%) 0.95% 1.07% 0.92% 0.66% 0.68% 0.78% 0.79% 1.11%
▅▇▁▂▁▂▃█ Net Charge-Off Ratio (%) 1.18% 1.31% 0.76% 0.88% 0.81% 0.91% 1.01% 1.45%
▁▂▁▂▃▇██ Tang. Book Value ($M) $561 $583 $545 $576 $605 $741 $743 $769
▁▁▁▁▁███ Gross Loans ($M) $3,979 $3,994 $3,983 $3,944 $4,002 $5,266 $5,256 $5,190
▁▁▃▃▃██▇ Total Deposits ($M) $4,552 $4,518 $4,847 $4,925 $4,869 $5,796 $5,661 $5,601
Portfolio Composition — Q1'26
Loan Mix%
Real Estate56%
C&I / Commercial21%
Consumer17%
Other6%
Deposit Mix%
Nonint.-Bearing Demand32%
Interest-Bearing (core)64%
Brokered / Other4%
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