TO THE SPANISH NATIONAL SECURITIES MARKET COMMISSION

In accordance with the provisions of Article 227 of Law 6/2023, of 17 March, on Securities Markets and Investment Services and other implementing regulations, Obrascón Huarte Laín, S.A.

(“OHLA” or the “Company”) hereby notifies and discloses the following:

OTHER RELEVANT INFORMATION

With regard to the reports published today concerning a potential sale of its 100%-owned Czech subsidiary, OHLA ŽS, as., the Company confirms that, in line with its objective of reducing its leverage and improving its financial position, it initiated an orderly market sounding process in the first quarter of the year, engaging external advisers for this purpose. The Company further confirms that it has received various expressions of interest in the asset.

As soon as the Company’s Board of Directors adopts a firm resolution to sell, this will be disclosed to the market.

Madrid, 14 September 2026.