SIERRA BANCORP

Item 4

CONTROLS AND PROCEDURES

Evaluation of Disclosure Controls and Procedures

The Company’s Chief Executive Officer and its Chief Financial Officer, after evaluating the effectiveness of the Company’s disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) as of the end

of the period covered by this report (the “Evaluation Date”) have concluded that as of the Evaluation Date, the Company’s disclosure controls and procedures were adequate and effective to ensure that material information relating to the Company and its consolidated subsidiaries would be made known to them by others within those entities, particularly during the period in which this quarterly report was being prepared.

Disclosure controls and procedures are designed to ensure that information required to be disclosed by the Company in the reports that are filed or submitted under the Exchange Act is accumulated and communicated to Management, including the Chief Executive Officer and Chief Financial Officer, as appropriate to allow timely decisions regarding required disclosure, and that such information is recorded, processed, summarized, and reported within the time periods specified by the SEC.

Changes in Internal Controls

There were no significant changes in the Company’s internal controls over financial reporting that occurred in the first three months of 2025 that have materially affected, or are reasonably likely to materially affect, the Company’s internal control over financial reporting.