Company: OSBC
Filing Date: 2025-04-23
Form Type: S-4
Source: 0001104659-25-037832
Chunk: 374

Company: OLD SECOND BANCORP INC
Filing Date: 2025-04-23
Form: S-4
Chunk 374
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parties further agree to replace such void or unenforceable provision of this Agreement with a valid and enforceable provision that will achieve, to the extent possible, the purposes of such void or unenforceable provision.

19. Headings . The headings in this Agreement are inserted for convenience and identification only and are in no way intended to describe, interpret, define or limit the scope, extent or intent of this Agreement or any provision hereof.

20. Counterparts . This Agreement may be executed in counterparts, each of which shall be deemed to constitute an original, but all of which together shall constitute one and the same instrument. This Agreement and any other agreement or instrument entered into in connection with this Agreement, as well as any amendments, modifications, supplements, or waivers hereto or thereto or hereunder or thereunder, if signed and delivered by means of a facsimile machine or by email delivery of a “.pdf” format data file, shall be treated for all purposes as an original agreement or instrument and shall be considered to have the same binding legal force and effect as if it were the original signed version thereof delivered in person.

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### IN WITNESS WHEREOF
, the parties have executed this Voting Agreement as of the day and year first above written.

#### OLD SECOND BANCORP, INC.
By:

Name:

Title:

#### BANCORP FINANCIAL, INC.
By:

Name:

Title:

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### STOCKHOLDER
By:

Name:

Title:

Address:

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Exhibit A

| Stockholder | ​ | ​ | Name(s) in Which Shares areRegistered | ​ | ​ | Number ofOwned Shares* | ​ |
| ​           | ​ | ​ | ​                                     | ​ | ​ | ​                      | ​ |
| ​           | ​ | ​ | ​                                     | ​ | ​ | ​                      | ​ |
| ​           | ​ | ​ | ​                                     | ​ | ​ | ​                      | ​ |

* The Owned Shares are subject to certain transfer restrictions set forth in the Bancorp Financial, Inc. Stockholders Agreement, effective February 14,