Company: ONBPP
Filing Date: 2025-02-03
Form Type: 424B3
Source: 0001104659-25-008430
Chunk: 360

Company: OLD NATIONAL BANCORP /IN/
Filing Date: 2025-02-03
Form: 424B3
Chunk 360
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TABLE OF CONTENTS

A ccepted as of theD ate first above written :

#### OldNationalBancorp
By:

/s/ James C. Ryan, III

James C. Ryan, III 
 Chief Executive Officer

<div align='center'>B-9</div>

TABLE OF CONTENTS

#### Annex C​

### FORM OF DIRECTOR VOTING AGREEMENT
November 25, 2024

Old National Bancorp 
 One Main Street 
 Evansville, Indiana 47708

Ladies and Gentlemen:

The undersigned shareholder and director (the “ Shareholder ”) of Bremer Financial Corporation, a Minnesota corporation (the “ Company ”), in the Shareholder’s capacity as a shareholder of the Company, and not in his or her capacity as a director or officer of the Company, as applicable, hereby acknowledges that the Company, Old National Bancorp, an Indiana corporation (“ Parent ”), and ONB Merger Sub, Inc., an Indiana corporation and a wholly-owned subsidiary of Parent (“ Merger Sub ”), have entered into an Agreement and Plan of Merger, dated as of the same date hereof (as amended or modified from time to time, the “ Merger Agreement ”), pursuant to which, among other things, Merger Sub will be merged with and into the Company, with the Company as the surviving corporation (the “ Surviving Corporation ”) in such merger (the “ Merger ”) and, immediately following the Merger, the Surviving Corporation will merge with and into Parent, with Parent as the surviving corporation of such Merger (the “ Second Step Merger ”, and together with the Merger, the “ Mergers ”). A copy of the Merger Agreement has been provided to the Shareholder. Capitalized terms used but not defined herein are to be deemed to have the same meanings assigned to them in the Merger Agreement.

As an inducement to and condition of Parent’s willingness to enter into the Merger Agreement, the Shareholder hereby agrees, represents and warrants as follows:

1. Owned Shares . As of the date hereof, the Shareholder owns (of record or beneficially) and has the full power and authority to vote [•] shares of Class A Company Common (the “ Owned Shares ”). For all purposes of this agreement, the Owned Shares will include any shares of Company Common Stock as to which the Shareholder acquires beneficial or record ownership after the date hereof. The Owned Shares are owned by