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

On Friday July 28^th, 2023 before market opening, OHLA will release 1H 2023 results.

The Management team of OHLA will hold a Conference call (conducted in English) for analysts and investors on Friday July, 28^th 2023 at 10:00h (Madrid time). The details of the conference will be available at: www.ohla-group.com

The recording of the call will be available on the web during a week.

Madrid, July 19^th, 2023.