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Capital Ratios (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024 | Jan. 01, 2019
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Capital Ratios |  |  |
Minimum capital required, capital amount | $ 3,565,394 | $ 2,522,926 |
Capital conversion buffer common equity Tier 1 of risk-weighted assets (as a percent) |  |  | 2.50%
Common equity Tier 1 to risk-weighted assets |  |  |
Actual, capital amount | $ 5,847,433 | $ 4,547,314 |
Actual, ratio (as a percent) | 11.48% | 12.62% |
Minimum capital required, capital amount | $ 4,329,408 | $ 3,063,552 |
Minimum capital required, ratio (as a percent) | 0.07% | 7.00% |
Required to be considered well capitalized, capital amount | $ 3,310,723 | $ 2,342,717 |
Required to be considered well capitalized, ratio (as a percent) | 0.065% | 0.065% |
Tier I capital to risk-weighted assets |  |  |
Actual, capital amount | $ 5,847,433 | $ 4,547,314 |
Actual, ratio (as a percent) | 0.1148 | 0.1262 |
Minimum capital required, capital amount | $ 4,329,408 | $ 3,063,552 |
Minimum capital required, ratio (as a percent) | 0.085 | 0.085 |
Required to be considered well capitalized, capital amount | $ 4,074,737 | $ 2,883,343 |
Required to be considered well capitalized, ratio (as a percent) | 0.08 | 0.08 |
Total capital to risk-weighted assets |  |  |
Actual, capital amount | $ 7,123,149 | $ 5,391,194 |
Actual, ratio (as a percent) | 0.1398 | 0.1496 |
Minimum capital required, capital amount | $ 5,348,092 | $ 3,784,388 |
Minimum capital required, ratio (as a percent) | 0.105 | 0.105 |
Required to be considered well capitalized, capital amount | $ 5,093,421 | $ 3,604,179 |
Required to be considered well capitalized, ratio (as a percent) | 0.10 | 0.10 |
Tier I capital to average assets (leverage ratio) |  |  |
Actual, capital amount | $ 5,847,433 | $ 4,547,314 |
Actual, ratio (as a percent) | 0.0936 | 0.1004 |
Minimum capital required, capital amount | $ 2,500,222 | $ 1,810,985 |
Minimum capital required, ratio (as a percent) | 0.04 | 0.04 |
Required to be considered well capitalized, capital amount | $ 3,125,277 | $ 2,263,732 |
Required to be considered well capitalized, ratio (as a percent) | 0.05 | 0.05 |
SouthState Bank (the Bank) |  |  |
Capital Ratios |  |  |
Minimum capital required, capital amount | $ 3,561,851 | $ 2,520,065 |
Common equity Tier 1 to risk-weighted assets |  |  |
Actual, capital amount | $ 6,421,904 | $ 4,817,945 |
Actual, ratio (as a percent) | 12.62% | 13.38% |
Minimum capital required, capital amount | $ 4,325,104 | $ 3,060,079 |
Minimum capital required, ratio (as a percent) | 0.07% | 7.00% |
Required to be considered well capitalized, capital amount | $ 3,307,433 | $ 2,340,060 |
Required to be considered well capitalized, ratio (as a percent) | 0.065% | 0.065% |
Tier I capital to risk-weighted assets |  |  |
Actual, capital amount | $ 6,421,904 | $ 4,817,945 |
Actual, ratio (as a percent) | 0.1262 | 0.1338 |
Minimum capital required, capital amount | $ 4,325,104 | $ 3,060,079 |
Minimum capital required, ratio (as a percent) | 0.085 | 0.085 |
Required to be considered well capitalized, capital amount | $ 4,070,686 | $ 2,880,074 |
Required to be considered well capitalized, ratio (as a percent) | 0.08 | 0.08 |
Total capital to risk-weighted assets |  |  |
Actual, capital amount | $ 7,002,021 | $ 5,271,725 |
Actual, ratio (as a percent) | 0.1376 | 0.1464 |
Minimum capital required, capital amount | $ 5,342,776 | $ 3,780,097 |
Minimum capital required, ratio (as a percent) | 0.105 | 0.105 |
Required to be considered well capitalized, capital amount | $ 5,088,358 | $ 3,600,093 |
Required to be considered well capitalized, ratio (as a percent) | 0.10 | 0.10 |
Tier I capital to average assets (leverage ratio) |  |  |
Actual, capital amount | $ 6,421,904 | $ 4,817,945 |
Actual, ratio (as a percent) | 0.1028 | 0.1064 |
Minimum capital required, capital amount | $ 2,499,168 | $ 1,810,497 |
Minimum capital required, ratio (as a percent) | 0.04 | 0.04 |
Required to be considered well capitalized, capital amount | $ 3,123,960 | $ 2,263,121 |
Required to be considered well capitalized, ratio (as a percent) | 0.05 | 0.05 |
Minimum |  |  |
Common equity Tier 1 to risk-weighted assets |  |  |
Actual, ratio (as a percent) | 4.50% |  |
Tier I capital to risk-weighted assets |  |  |
Minimum capital required, ratio (as a percent) | 0.06 |  |
Total capital to risk-weighted assets |  |  |
Actual, ratio (as a percent) | 0.04 |  |
Tier I capital to average assets (leverage ratio) |  |  |
Actual, ratio (as a percent) | 0.08 |  |

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