OBRASCÓN HUARTE LAIN, S.A. (“OHLA” or the “Company”), pursuant to article 227 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

OTHER RELEVANT INFORMATION

Following the communication of inside information published by the Company on 14 October 2024 (with official registry number 2,406), the Company announces that on the date hereof the Company’s subsidiary OHL Operaciones, S.A.U. (the “Issuer”) has obtained the approval from holders of its Split Coupon Senior Secured Notes due 2026 (ISIN: XS2356570239)/ (ISIN: XS2356571120) (the “Notes”) to the proposal set out in the consent solicitation memorandum published by the Issuer on

14 October 2024. As a consequence, the Issuer will be able to pay the coupon of the Notes due on

15 September on or prior to 31 October 2024.

Madrid 17 October 2024.