Company: OSBC
Filing Date: 2025-05-08
Form Type: 424B3
Source: 0001104659-25-046065
Chunk: 160

Company: OLD SECOND BANCORP INC
Filing Date: 2025-05-08
Form: 424B3
Chunk 160
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 While a significant portion of the portfolio consists of readily marketable securities to address future liquidity needs, other parts of the portfolio are longer term in nature and may reflect investments that assist us to meet our Community Reinvestment Act (“CRA”) Strategic Plan investment objectives. The municipal bond issuances generally consist of smaller investment amounts with either rated or guaranteed issuers nationwide. The credit quality of these issuers is monitored regularly, and none have been identified as posing a material risk of loss.

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TABLE OF CONTENTS The following table sets forth the carrying value and certain information regarding contractual maturities and the weighted average yields of securities at December 31, 2024: Securities Portfolio Maturity and Yields

| ​                                      
 (Dollars in thousands)                 | ​ 
 ​ | ​ 
 ​ | Within One year 
 Amount          |   |       |   | ​ | ​ | Yield |   |       |   | ​ 
 ​ | ​ 
 ​ | After One ButThrough Five Years 
 Amount                          |   |        |   | ​ | ​ | Yield |   |       |   | ​ 
 ​ | ​ 
 ​ | After Five ButThrough Ten Years 
 Amount                          |   |       |   | ​ | ​ | Yield |   |       |   | ​ 
 ​ | ​ 
 ​ | After Ten Years 
 Amount          |   |         |   | ​ | ​ | Yield |   |       |   | ​ 
 ​ | ​ 
 ​ | Total  
 Amount |   |         |   | ​ | ​ | Yield |   |       |   | ​ 
 ​ |
|:---------------------------------------|:--|:--|:----------------|:--|------:|:--|:--|:--|:------|:--|:------|:--|:--|:--|:--------------------------------|:--|-------:|:--|:--|:--|:------|:--|------:|:--|:--|:--|:--------------------------------|:--|------:|:--|:--|:--|:------|:--|------:|:--|:--|:--|:----------------|:--|--------:|:--|:--|:--|:------|:--|------:|:--|:--|:--|:-------|:--|--------:|:--|:--|:--|:------|:--|------:|:--|