Company: OSBC
Filing Date: 2025-05-06
Form Type: S-4/A
Source: 0001104659-25-045103
Chunk: 196

Company: OLD SECOND BANCORP INC
Filing Date: 2025-05-06
Form: S-4/A
Chunk 196
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55,987,771 | ​ | ​ |
| Municipal bonds                        | ​ | ​ | ​             | ​ |  49,051,655 | ​ | ​ | ​ | ​                    | ​ | 352,581 | ​ | ​ | ​ | ​                     | ​ |  3,241,851 | ​ | ​ | ​ | ​         | ​ |  46,162,385 | ​ | ​ |
| Corporate and other securities         | ​ | ​ | ​             | ​ |   1,997,948 | ​ | ​ | ​ | ​                    | ​ |       — | ​ | ​ | ​ | ​                     | ​ |     93,908 | ​ | ​ | ​ | ​         | ​ |   1,904,040 | ​ | ​ |
| Total securities                       | ​ | ​ | ​             | $ | 137,251,383 | ​ | ​ | ​ | ​                    | $ | 467,645 | ​ | ​ | ​ | ​                     | $ | 11,525,686 | ​ | ​ | ​ | ​         | $ | 126,193,342 | ​ | ​ |

F-18

TABLE OF CONTENTS

Bancorp Financial, Inc. and Subsidiary Notes to Consolidated Financial Statements Note 2. Securities (continued) The following tables show the Company’s gross unrealized losses and fair value on investments, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position:

| ​                                      
 Description of Securities              
 As of December 31, 2024:               | ​ 
 ​ 
 ​ | ​ 
 ​ 
 ​ | Continuous unrealizedlosses existing for lessthan 12 months 
 Fair Value                                                  
 ​                                                           | ​ |          ​ | ​ | ​ 
 ​ | ​ 
 ​ | UnrealizedLosses 
 ​                | ​ |       ​ | ​ | ​ 
 ​ 
 ​ | ​ 
 ​ 
 ​ | Continuous unrealizedlosses existing greaterthan 12 months 
 Fair Value                                                 
 ​                                                          | ​ |          ​ | ​ | ​ 
 ​ | ​ 
 ​ | UnrealizedLosses 
 ​                | ​ |          ​ | ​ | ​ 
 ​ 
 ​ | ​ 
 ​ 
 ​ | Total      
 Fair Value 
 ​          | ​ |           ​ | ​ | ​ 
 ​ | ​ 
 ​ | UnrealizedLosses 
 ​                | ​ |          ​ | ​ |