Santiago, September 10, 2026

Mrs.

Catherine Tornel León

President

Financial Markets Commission

Present

Ref: Material Fact

Mrs President,

Pursuant to Articles 9 and 10 of Law No. 18,045 and the other applicable regulations, we hereby inform you that, as of today, the Chairman of the Board of Directors of Banco Santander-Chile has received a letter from alternate director Mr. Alfonso Gómez Morales tendering his resignation with immediate effect for personal reasons.

Sincerely,

Andrés Trautmann Buc

CEO

Banco Santander Chile