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Regulatory Restrictions (Tables) | 12 Months Ended
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Dec. 31, 2025
Compliance With Regulatory Capital Requirements Under Banking Regulations [Abstract] |
Schedule of Capital Ratios | The following table summarizes capital ratios for Old National and Old National Bank:
| Actual |  | Regulatory Minimum (1) |  | Prompt Corrective Action “Well Capitalized” Guidelines (2)
(dollars in thousands) | Amount |  | Ratio |  | Amount |  | Ratio |  | Amount |  | Ratio
December 31, 2025 |  |  |  |  |  |  |  |  |  |  |
Total capital to risk-weighted assets |  |  |  |  |  |  |  |  |  |  |
Old National Bancorp | $ | 6,889,846 |  |  | 12.85 | % |  | $ | 5,629,850 |  |  | 10.50 | % |  | $ | 5,361,762 |  |  | 10.00 | %
Old National Bank | 6,407,355 |  |  | 12.00 |  |  | 5,604,101 |  |  | 10.50 |  |  | 5,337,239 |  |  | 10.00 |
Common equity Tier 1 capital to risk-weighted assets |  |  |  |  |  |  |  |  |  |  |
Old National Bancorp | 5,939,683 |  |  | 11.08 |  |  | 3,753,233 |  |  | 7.00 |  |  | N/A |  | N/A
Old National Bank | 5,899,410 |  |  | 11.05 |  |  | 3,736,067 |  |  | 7.00 |  |  | 3,469,205 |  |  | 6.50 |
Tier 1 capital to risk-weighted assets |  |  |  |  |  |  |  |  |  |  |
Old National Bancorp | 6,183,402 |  |  | 11.53 |  |  | 4,557,498 |  |  | 8.50 |  |  | 3,217,057 |  |  | 6.00 |
Old National Bank | 5,899,410 |  |  | 11.05 |  |  | 4,536,653 |  |  | 8.50 |  |  | 4,269,791 |  |  | 8.00 |
Tier 1 capital to average assets |  |  |  |  |  |  |  |  |  |  |
Old National Bancorp | 6,183,402 |  |  | 8.90 |  |  | 2,778,362 |  |  | 4.00 |  |  | N/A |  | N/A
Old National Bank | 5,899,410 |  |  | 8.52 |  |  | 2,768,451 |  |  | 4.00 |  |  | 3,460,563 |  |  | 5.00 |
December 31, 2024 |  |  |  |  |  |  |  |  |  |  |
Total capital to risk-weighted assets |  |  |  |  |  |  |  |  |  |  |
Old National Bancorp | $ | 5,388,882 |  |  | 13.37 | % |  | $ | 4,233,054 |  |  | 10.50 | % |  | $ | 4,031,480 |  |  | 10.00 | %
Old National Bank | 5,103,487 |  |  | 12.72 |  |  | 4,214,255 |  |  | 10.50 |  |  | 4,013,577 |  |  | 10.00 |
Common equity Tier 1 capital to risk-weighted assets |  |  |  |  |  |  |  |  |  |  |
Old National Bancorp | 4,587,674 |  |  | 11.38 |  |  | 2,822,036 |  |  | 7.00 |  |  | N/A |  | N/A
Old National Bank | 4,742,641 |  |  | 11.82 |  |  | 2,809,504 |  |  | 7.00 |  |  | 2,608,825 |  |  | 6.50 |
Tier 1 capital to risk-weighted assets |  |  |  |  |  |  |  |  |  |  |
Old National Bancorp | 4,831,393 |  |  | 11.98 |  |  | 3,426,758 |  |  | 8.50 |  |  | 2,418,888 |  |  | 6.00 |
Old National Bank | 4,742,641 |  |  | 11.82 |  |  | 3,411,540 |  |  | 8.50 |  |  | 3,210,861 |  |  | 8.00 |
Tier 1 capital to average assets |  |  |  |  |  |  |  |  |  |  |
Old National Bancorp | 4,831,393 |  |  | 9.21 |  |  | 2,097,820 |  |  | 4.00 |  |  | N/A |  | N/A
Old National Bank | 4,742,641 |  |  | 9.07 |  |  | 2,090,427 |  |  | 4.00 |  |  | 2,613,033 |  |  | 5.00 |
(1)“Regulatory Minimum” capital ratios include the 2.5% “capital conservation buffer” required under the Basel III Capital Rules. (2)“Well-capitalized” minimum common equity Tier 1 capital to risk-weighted assets and Tier 1 capital to average assets ratios are not formally defined under applicable banking regulations for bank holding companies.

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