Company: OSBC
Filing Date: 2025-05-08
Form Type: 424B3
Source: 0001104659-25-046065
Chunk: 131

Company: OLD SECOND BANCORP INC
Filing Date: 2025-05-08
Form: 424B3
Chunk 131
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 and solar loan portfolio sales proceeds of $32.9 million. (B) Adjustment to Bancorp Financial specific to the anticipated sale of $122.8 million of available for sale securities and subsequent reinvestment of $33.0 million. (C) Adjustment to Bancorp Financial loans reflects estimated fair value adjustments, which include the adjustment for the credit component of the loan portfolio, the purchased credit deteriorated (“PCD”) loan CECL gross up, adjustments related to current interest rates and liquidity, and adjustments attributable to the projected sale of the solar loan portfolio.

| ​                                                                             | ​ | ​ | As Presented |   |         |   | ​ | ​ | Attributed toSolar |   |         |   | ​ |
|:------------------------------------------------------------------------------|:--|:--|:-------------|:--|--------:|:--|:--|:--|:-------------------|:--|--------:|:--|:--|
| Estimate of fair value adjustments for the credit component on acquired loans | ​ | ​ | ​            | $ | -28,000 | ​ | ​ | ​ | ​                  | $ |  -4,306 | ​ | ​ |
| Estimate of PCD loan CECL gross-up                                            | ​ | ​ | ​            | ​ |  14,075 | ​ | ​ | ​ | ​                  | ​ |   2,153 | ​ | ​ |
| Estimate of fair value related to current interest rates and liquidity        | ​ | ​ | ​            | ​ | -13,098 | ​ | ​ | ​ | ​                  | ​ | -12,761 | ​ | ​ |
| Net fair value pro forma loan adjustments                                     | ​ | ​ | ​            | $ | -27,023 | ​ | ​ | ​ | ​                  | $ | -14,914 | ​ | ​ |

(D) Adjustments to allowance for credit losses include the following:

| ​                                                                                                        | ​ | ​ | As Presented |   |         |   | ​ | ​ | Attributed toSolar |   |        |   | ​ |
|:---------------------------------------------------------------------------------------------------------|:--|:--|:-------------|:--|--------:|:--|:--|:--|:-------------------|:--|-------:|:--|:--|
| Reversal of historical Bancorp Financial allowance for credit loss                                       | ​ | ​ | ​            | $ | -20,649 | ​ | ​ | ​ | ​