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

Today after market closing, OHLA will release 1H 2024 results.

The Management team of OHLA will hold a Conference call (conducted in English) for analysts and investors at 18:00h (Madrid time). The details of the conference will be available at: https://ohla-group.com/en/results/

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

Madrid, July 29, 2024.