GLACIER BANCORP, INC.

Evaluation of Disclosure Controls and Procedures

The Company’s Chief Executive Officer and Chief Financial Officer have reviewed and evaluated the effectiveness of the Company’s disclosure controls and procedures (as required by Exchange Act Rules 240.13a-15(b) and 15d-14(c)) as of June 30, 2025.

The Company acquired Bank of Idaho Holding Co. and its wholly-owned subsidiary, Bank of Idaho, (collectively “BOI”) during the second quarter of 2025. Management excluded from its assessment of the effectiveness of the Company’s internal control over financial reporting as of June 30, 2025 BOI’s internal control over financial reporting associated with total assets of $1.3 billion, or 4% of the Company’s total consolidated assets, and net interest income of $9.2 million, or 2% of the Company’s total consolidated net interest income.

Based on that evaluation, the Chief Executive Officer and Chief Financial Officer have concluded that the Company’s current disclosure controls and procedures are effective and timely, providing them with material information relating to the Company required to be disclosed in the reports the Company files or submits under the Exchange Act.

Changes in Internal Controls

There have not been any changes in the Company’s internal control over financial reporting (as such term is defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) during the second quarter of 2025, to which this report relates that have materially affected, or are reasonably likely to materially affect the Company’s internal control over financial reporting.