Company: OSBC
Filing Date: 2025-05-06
Form Type: S-4/A
Source: 0001104659-25-045103
Chunk: 233

Company: OLD SECOND BANCORP INC
Filing Date: 2025-05-06
Form: S-4/A
Chunk 233
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| Municipal bonds                        | ​ | ​ | ​                                                  | ​ | 46,162,385 | ​ | ​ | ​ | ​                                                           | ​ | — | ​ | ​ | ​ | ​                                          | ​ | 46,162,385 | ​ | ​ | ​ | ​                                            | ​ | — | ​ | ​ |
| Corporate and other bonds              | ​ | ​ | ​                                                  | ​ |  1,904,040 | ​ | ​ | ​ | ​                                                           | ​ | — | ​ | ​ | ​ | ​                                          | ​ |  1,904,040 | ​ | ​ | ​ | ​                                            | ​ | — | ​ | ​ |

Securities available for sale: When available, quoted market prices are used to determine the fair value of investment securities and such items are classified within Level 1 of the fair value hierarchy. An example is U.S. Treasury securities and mutual funds. For other securities, the Company determines fair value based on various sources and may apply matrix pricing with observable prices for similar bonds where a price for the identical bond is not observable. Securities measured at fair value by such methods are classified as Level 2. During the years ended December 31, 2024 and 2023, there were no transfers between levels. Assets and Liabilities Recorded at Fair Value on a Nonrecurring Basis The Company may be required, from time to time, to measure certain assets and liabilities at fair value on a nonrecurring basis in accordance with accounting principles generally accepted in the United States of America. These include assets that are measured at the lower of cost or market that were recognized at fair value below cost at the end of the period. Assets measured at fair value on a nonrecurring basis are included in the table below:

| ​                                            
 ​                                            | ​ 
 ​ | ​ 
 ​ | Fair Value Measurements at December 31, 2024 Using 
 December 31,2024                                   |   |            |   | ​ | ​ | Quoted Prices inActive Markets forIdentical Assets(Level 1) |   |   |   | ​ | ​ | Significant OtherObservableInputs(Level 2) |   |   |   | ​ | ​ | Significant OtherUnobservableInputs(Level 3) |   |            |   | ​ 
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