OBRASCÓN HUARTE LAIN, S.A. (“OHLA” or the “Company”), pursuant to article 226 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

INSIDE INFORMATION

The Company announces that the Company’s subsidiary OHL Operaciones, S.A.U. (the “Issuer”) has requested holders of its Split Coupon Senior Secured Notes due 2026 (ISIN: XS2356570239)/ (ISIN: XS2356571120) (the “Notes” and the “Noteholders”) their approval to certain temporary consents and waivers to the terms and conditions of the Notes to allow the delay in the payment of the next coupon under the Notes during the ongoing negotiations between the Company and its stakeholders towards defining the terms of a potential transaction that would lead to a sustainable capital structure, pursuant to the terms of a consent solicitation memorandum prepared by the Issuer (the “Consent Solicitation Memorandum”).

Noteholders can obtain a copy of the Consent Solicitation Memorandum from The Bank of New York Mellon SA/NV Dublin Branch.

Pursuant to the Consent Solicitation Memorandum, the deadline for submission by Noteholders of Electronic Consent Instructions (as defined in the Consent Solicitation Memorandum) is 5:00 p.m. (Central European Time) on 16 September 2024, unless it is extended, re-opened or terminated as provided in the Consent Solicitation Memorandum.

ADDITIONAL INFORMATION

The following contact details have been provided for Noteholders to request any information or clarifications regarding the Consent Solicitation Memorandum:

Tabulation Agent:

The Bank of New York Mellon SA/NV Dublin Branch

Riverside Two

Sir John Rogerson’s Quay

Dublin 2

Ireland

For information by telephone: + (44) 0 1 202 689 644

Attention: Debt Restructuring Services

Email: debtrestructuring@bnymellon.com

Madrid 10 September 2024