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 25 October 2024 (with official registry number 2,421), 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 25 October 2024. As a consequence, the Issuer will be able to pay the coupon of the Notes due on 15 September 2024 (the “September Coupon”) on or prior to 15 November 2024. However, to the extent that the calculation agent receives accessions to the Lock-Up Agreement from Noteholders holding at least 50 per cent. by value of the aggregate principal amount of outstanding Notes on or prior to 15 November 2024, the Issuer will be able to pay the September Coupon on or prior to the earliest of (a) the Recapitalisation Effective Date or (b) 31 March 2024, unless the Lock-Up Agreement is terminated at any time.

Madrid 30 October 2024.