Banner Corporation Amends Code of Ethics

Banner Corporation has filed a Form 8-K with the SEC, reporting amendments to its Code of Ethics and Business Conduct. The amendments, approved by the Board of Directors on July 22, 2025, became effective on September 16, 2025. The changes include minor clarifications regarding the use of corporate resources for political purposes and expectations for ethical and professional behavior at work and when representing the company. The amended Code of Ethics governs the conduct of all officers, directors, and employees of the company and its subsidiaries. The filing also includes the full text of the amended Code of Ethics as Exhibit 14.1.