Company: ONBPP
Filing Date: 2025-01-29
Form Type: S-4/A
Source: 0001104659-25-007256
Chunk: 7

Company: OLD NATIONAL BANCORP /IN/
Filing Date: 2025-01-29
Form: S-4/A
Chunk 7
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 and adoption of the merger agreement and “

#### FOR
” the adjournment proposal, subject to the terms of the trustee voting agreement and director voting agreements, as applicable.

#### Your vote is very important.
The mergers cannot be completed unless Bremer shareholders approve the merger proposal.

Whether or not you plan to attend the special meeting virtually, you are urged to vote now to make sure there will be a quorum for the special meeting. Please vote as soon as possible.

TABLE OF CONTENTS

There are three possible ways you may hold Bremer common stock: (1) directly in your name, (2) under the Bremer 401(k) Plan or (3) under the Bremer Employee Stock Ownership Plan. 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 providing instructions for voting the shares under the Bremer 401(k) Plan and Bremer Employee Stock Ownership Plan is 10:59 p.m. Central Time on March 3, 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 into 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.

Under the Minnesota Business Corporation Act (“MBCA”), shareholders of Bremer have the right to assert dissenters’ rights with respect to the mergers. The enclosed proxy statement/prospectus provides a detailed description of the procedures for asserting dissenters’ rights under the MBCA, and the applicable provisions of