Company: OSBC
Filing Date: 2025-04-23
Form Type: S-4
Source: 0001104659-25-037832
Chunk: 243

Company: OLD SECOND BANCORP INC
Filing Date: 2025-04-23
Form: S-4
Chunk 243
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 Bank ”) and, following the Bank Merger, the separate corporate existence of Company Bank shall cease. The Parties agree that the Bank Merger shall become effective immediately following the Effective Time. The Bank Merger shall be implemented pursuant to an agreement and plan of merger, in the form attached hereto as Exhibit B (the “ Bank Merger Agreement ”). (a) Company shall cause the Board of Directors of Company Bank to approve the Bank Merger Agreement, Company, as the sole shareholder of Company Bank, shall approve the Bank Merger Agreement and Company shall cause the Bank Merger Agreement to be duly executed by Company Bank and delivered to Buyer, and (b) Buyer shall cause the Board of Directors of Buyer Bank to approve the Bank Merger Agreement, Buyer, as the sole shareholder of Buyer Bank, shall approve the Bank Merger Agreement and Buyer shall cause the Bank Merger Agreement to be duly executed by Buyer Bank and delivered to Company. Prior to the Effective Time, Company shall cause Company Bank, and Buyer shall cause Buyer Bank, to execute such articles of merger or statements of merger and such other documents and certificates (the “ Bank Merger Certificates ”) as are necessary to cause the Bank Merger to become effective immediately following the Effective Time. The Merger and the Bank Merger are collectively referred to herein as the “ Mergers ”.

1.8

#### Tax Treatment of the Merger
. It is intended that the Merger shall qualify as a “reorganization” within the meaning of Section 368(a) of the Code, and that this Agreement is intended to be and is adopted as a “plan of reorganization” within the meaning of Section 1.368-2(g) of the regulations promulgated under the Code.

<div align='center'>A-2</div>

TABLE OF CONTENTS

#### ARTICLE 2MANNER OF CONVERTING SHARES
2.1

#### Conversion of Company Common Stock
. Subject to the provisions of this Article 2 , at the Effective Time, by virtue of the Merger and without any action on the part of Buyer, Company or the stockholders of either of the foregoing:

(a) All shares of capital stock of Company issued and outstanding immediately prior to the Effective Time that are owned by Company as treasury stock or held by Company, any Company Subsidiary, Buyer or any Buyer Subsidiary (in each case other than held in a fiduciary or agency capacity or as a result of debts previously contracted) (collectively