OBRASCON HUARTE LAIN, S.A. (“OHLA” or the “Company”), pursuant to article 228 of the consolidated text of the Spanish Securities Market Act approved by Royal Legislative Decree 4/2015, of 23 October, hereby notifies the Spanish National Securities Market Commission (Comisión Nacional del Mercado de Valores) (“CNMV”) the following

DISCLOSURE OF OTHER RELEVANT INFORMATION

OHLA will release 9M 2023 results report on Thursday November 16^th, after market closing.

Madrid, November 14^th, 2023