Company: ONBPP
Filing Date: 2025-01-14
Form Type: S-4
Source: 0001104659-25-003488
Chunk: 7

Company: OLD NATIONAL BANCORP /IN/
Filing Date: 2025-01-14
Form: S-4
Chunk 7
---
 401(k) Plan (the “Bremer 401(k) Plan shares”) or (3) under the Bremer Employee Stock Ownership Plan (the “Bremer ESOP shares”). You will need to follow the instructions for voting each category of shares you may own. You will have to complete separate voting instructions for each of these holdings if you hold shares in two or more of these categories in order for all of your shares to be voted. Please note that the deadline for

TABLE OF CONTENTS

providing instructions for voting the shares under the Bremer 401(k) Plan and Bremer Employee Stock Ownership Plan (the “Bremer ESOP”) is 10:59 p.m. Central Time on [ ], 2025, which is 72 hours prior to the deadline for shareholders generally.

The enclosed proxy statement/prospectus provides a detailed description of the special meeting, the mergers, the merger agreement, the documents related to the mergers and other related matters. You are urged to read the proxy statement/prospectus, including any documents incorporated in the proxy statement/ prospectus by reference, and its annexes carefully and in their entirety. If you have any questions concerning the mergers or the proxy statement/prospectus, would like additional copies of the proxy statement/ prospectus, or need help voting your shares of Bremer common stock, you should contact Bremer’s Corporate Secretary via (i) mail at Bremer Financial Corporation, 380 St. Peter Street, Suite 500, St. Paul, Minnesota 55102, Attention: Amy J. Dorn, Corporate Secretary, (ii) email at ajdorn@bremer.com or (iii) telephone at (651) 964-7145.

The Bremer board of directors has unanimously determined and declared that the merger agreement, the mergers and the transactions contemplated by the merger agreement are advisable and in the best interests of Bremer and its shareholders, has unanimously approved and adopted the merger agreement, the mergers, and the transactions contemplated by the merger agreement, and unanimously recommends that Bremer shareholders vote “FOR” the proposal to approve and adopt the merger agreement and “FOR” the proposal to adjourn the Bremer special meeting, if necessary or appropriate.

[ ], 2025

By Order of the Board of Directors

Amy J. Dorn 
 Corporate Secretary 
 Bremer Financial Corporation

TABLE OF CONTENTS

### ADDITIONAL INFORMATION
This proxy statement/prospectus incorporates important business and financial information about Old National from documents