OBRASCÓN HUARTE LAIN, S.A. (“OHLA” or the “Company”), pursuant to article 226 of Law 6/2023, of 17 March, on the Securities Markets and of the Investment Services, hereby notifies the Spanish National Securities Market Commission (Comisión Nacional del Mercado de Valores) (“CNMV”) of the following

INSIDE INFORMATION NOTICE

Further to the inside information published on June 5, 2024 (registration number 2279), the Company informs about the completion of the sale of 25% of the share capital of Societé en Commandite Santé Montreal Collectif, the company holding the concession for the CENTRO HOSPITALARIO UNIVERSITARIO MONTREAL (CHUM), to John Laing Health Montreal Limited, as well as the subordinated loan held by the Company’s group to said concessionaire.

The total price, after making the adjustments set forth in the sale and purchase agreement, is of 66,022,755 CAD (44,968,099 Euro).

The net proceeds from the sale will be applied in accordance with the provisions of the lock-up agreement signed on November 2, 2024 by, among others, the Company, OHL Operaciones,

S.A.U. and certain entities holding the senior secured bonds due in 2026 issued by OHL Operaciones, S.A.U., which was referred to in the inside information published on November 4, 2024, (registration number 2448).

This transaction, which complies with the roadmap agreed upon by the Company in the asset rotation plan included in the recapitalization process it is undergoing, will have a positive impact of approximately 15 million Euro on the Company’s income statement.

Madrid, 28 November 2024