Exhibit 99.1 INTERIM CONSOLIDATED FINANCIAL STATEMENTS For the periods ending on June 30, 2023, and 2022, and December 31, 2022 Santander INDEPENDENT AUDITOR'S REVIEW REPORT (A free translation from the original in Spanish) Santiago, July 28, 2023 To the Shareholders and Directors Banco Santander Chile Results of the review of interim consolidated financial information We have audited the accompanying interim consolidated financial statements of Banco Santander Chile and subsidiaries, which comprise the int ...