OBRASCÓN HUARTE LAIN, S.A. (“OHLA” or the “Company”), in compliance with the provisions of Article 227 of Law 6/2023, of March 17, of the Securities Markets and Investment Services Law, hereby informs the National Securities Market Commission of the following

DISCLOSURE OF OTHER RELEVANT INFORMATION

The Company informs that the new potential investors, after negotiations with banks and bondholders, have ratified their investment commitment, considering that the conditions linked to the agreements to be reached with banks and bondholders to which they subjected their investment commitments have been fulfilled.

The Company also announces that the reference shareholders and the investment group led by Excelsior Times have informed the Company that they have agreed to analyze, as part of the Company’s liquidity strengthening operations, a possible issuance by the Company of convertible bonds of up to 50 million euros in principal amount, maturing in 6 years (the “Convertible Notes”). The Convertible Notes, which would be subordinated to the Company’s senior debt, would have an interest rate in accordance with the market rate for this class of instruments, mostly PIK and would be convertible at the discretion of the Holders of the Convertible Notes as from the second year. It is estimated that the conversion could be at a rate in line with the subscription price of the capital increases which will be submitted for shareholders’ approval at the Extraordinary General Shareholders’ Meeting to be held on October 21 and 22, endorsed, if applicable, by an independent expert.

The issuance of the Convertible Notes would be submitted to the Board of Directors of the Company for approval by the shareholders at a future Extraordinary General Shareholders’ Meeting.

Madrid, October 21, 2024.