SIERRA BANCORP

Report of Independent Registered Public Accounting Firm

To the Board of Directors and Shareholders

Sierra Bancorp Porterville, California

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheet of Sierra Bancorp and subsidiary (the Company) as of December 31, 2022, and the related consolidated statements of income, comprehensive income, changes in shareholders’ equity, and cash flows, for each of the years in the two-year period ended December 31, 2022, and the related notes (collectively referred to as the “financial statements”). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2022, and the results of its operations and its cash flows for each of the years in the two-year period ended December 31, 2022, in conformity with accounting principles generally accepted in the United States of America.

Basis for Opinion

These financial statements are the responsibility of the entity’s management. Our responsibility is to express an opinion on these financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) ("PCAOB") and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud.

Our audits included performing procedures to assess the risk of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

We have served as Sierra Bancorp’s auditor from 2004 through 2022 (such dates incorporate the

acquisition of certain assets of Vavrinek, Trine, Day & Co., LLP by Eide Bailly in 2019).

San Ramon, California

March 9, 2023