Company: ONBPP
Filing Date: 2025-07-11
Form Type: 8-K/A
Source: 0001628280-25-034796
Chunk: 1

Company: OLD NATIONAL BANCORP /IN/
Filing Date: 2025-07-11
Form: 8-K/A
Chunk 1
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| Depositary Shares, each representing a 1/40th interest in a share of Non-Cumulative Perpetual Preferred Stock, Series A |     | ONBPP     |     | The NASDAQ Stock Market LLC               |
| Depositary Shares, each representing a 1/40th interest in a share of Non-Cumulative Perpetual Preferred Stock, Series C |     | ONBPO     |     | The NASDAQ Stock Market LLC               |

Indicate by check mark whether the Registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 ( § 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 ( § 240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the Registrant has elected not to use extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

#### Introductory Note.
This Amendment No. 1 to Form 8-K (this “8-K Amendment”) is being filed in connection with the closing on May 1, 2025 of the merger of Bremer Financial Corporation (“Bremer”), a Minnesota corporation, with and into Old National Bancorp (“Old National”), an Indiana corporation (the “Merger”), with Old National as the surviving corporation in the Merger, pursuant to the Agreement and Plan of Merger, dated as of November 25, 2024 (the “Merger Agreement”), by and among Old National, Bremer and ONB Merger Sub, Inc., an Indiana corporation and wholly owned subsidiary of Old National, as previously disclosed in the Current Report on Form 8-K filed on May 1, 2025 (the “Original 8-K”). This 8-K Amendment is being filed by Old National to amend Item 9.01 of the Original 8-K solely to present certain financial information in connection with the Merger.

#### Item 9.01 Financial Statements and Exhibits.
(a) Financial Statements of Business Acquired.

The audited consolidated statements of financial condition of Bremer as of December 31, 2024 and 2023 and the related consolidated statements of income, comprehensive income, changes in stockholders’ equity, and cash flows of Bremer for each of the two fiscal years in the period ended December 31,