Company: OSBC
Filing Date: 2025-05-08
Form Type: 424B3
Source: 0001104659-25-046065
Chunk: 132

Company: OLD SECOND BANCORP INC
Filing Date: 2025-05-08
Form: 424B3
Chunk 132
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                  | $ | -1,005 | ​ | ​ |
| Increase in allowance for credit losses for gross-up for estimateof lifetime credit losses for PCD loans | ​ | ​ | ​            | ​ |  14,075 | ​ | ​ | ​ | ​                  | ​ |  2,153 | ​ | ​ |
| Total fair value adjustments to allowance for credit losses                                              | ​ | ​ | ​            | ​ |  -6,574 | ​ | ​ | ​ | ​                  | ​ |  1,148 | ​ | ​ |
| Provision for estimated lifetime credit losses for non-PCD loans                                         | ​ | ​ | ​            | ​ |  14,075 | ​ | ​ | ​ | ​                  | ​ |  2,153 | ​ | ​ |
| Total transaction accounting adjustments to allowance for credit losses                                  | ​ | ​ | ​            | $ |   7,501 | ​ | ​ | ​ | ​                  | ​ |  3,301 | ​ | ​ |

(E) Provision for estimated lifetime credit losses for non-PCD loans of $14.1 million to be recorded immediately following the consummation of the merger, which includes $2.2 million of estimated lifetime credit losses related to non-PCD solar portfolio loans. (F) Adjustment to record an estimated goodwill associated with the merger of $50.6 million. (G) Adjustment to record an estimated core deposit intangible of $8.9 million associated with the merger. (H) Adjustments to deferred tax assets to reflect the effects of the acquisition accounting adjustments, the $14.1 million provision for credit losses for non-PCD loans and $7.0 million of estimated merger expenses. The tax effect of acquisition related adjustments is calculated at a 21% tax rate. (I) Adjustment to reflect preliminary estimate of fair value of interest-bearing deposits with maturities of $210,000 and payoff of $149.7 million in brokered deposits. (J) Adjustments to deferred tax liabilities to reflect the deferred tax effects of the $8.9 million of core deposit intangible. The tax effect of acquisition related adjustments is calculated at a 21% tax rate. (K) Adjustments to other liabilities to reflect estimated accruals for merger-related professional, legal, and other contractually obligated merger expenses expected to be incurred.

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(L)

Adjustment of $(2.8 million) to