Report 12/2026 - Receipt of a request for information from the Company's majority shareholder and cancellation of the Extraordinary General Meeting

The Management Board of Mostostal Warszawa S.A. with its registered office in Warsaw (the "Company"), in reference to the current report no. 8/2026 dated March 30, 2026, hereby informs that it has received from Acciona Construcción S.A. - Acciona Construcción Polonia S.L., the majority shareholder of the Company (a dominant entity in relation to the Company - 62.13% of the total number of votes at the General Meeting), a request to:

1. provide information regarding: (i) the anticipated capital needs of the Company resulting from the forecasted financial effects of contract terminations in recent months and in light of the estimated financial results disclosed in the current report no. 7/2026 dated March 30, 2026 ("Report"); and (ii) the planned sources of financing for the above-mentioned capital needs - pursuant to Article 428 § 1 and § 6 of the Act of September 15, 2000 - the Commercial Companies Code ("CCC") in connection with the notice of convening an Extraordinary General Meeting dated March 30, 2026 ("EGM"), and particularly with point 7 of the agenda regarding the adoption of a resolution on the continuation of the Company's existence within the meaning of Article 397 CCC; and

2. cancel the EGM, which is to be convened again for a date that allows the adoption of a resolution on the continuation of the Company's existence within the meaning of Article 397 CCC only after:

- providing the Company's shareholders with the requested information; and

- publishing the audited financial statement of the Company for the year 2025; and

- the Management Board of the Company presents information regarding medium- and/or long-term financing by financial institutions made available to the Company or the General Meeting considers a resolution on increasing the Company's share capital in response to the current and forecasted financial situation of the Company

- i.e. for a date allowing a comprehensive analysis of the materials and financial statements provided by the Company.

According to the Shareholder's request, the Management Board of the Company hereby cancels the Extraordinary General Meeting convened for April 28, 2026, at 12:00 at the Company's registered office: ul. Konstruktorska 12A, 02-673 Warsaw, with the agenda specified in the current report no. 8/2026 dated March 30, 2026.

All materials provided to the Shareholder in accordance with Article 428 § 1 and § 6 CCC will be disclosed by the Company in accordance with applicable law.

The Management Board informs that the General Meeting will be convened again without delay with a resolution on the continuation of the Company's existence within the meaning of Article 397 CCC, included in the agenda for that day, in such a way as to allow all shareholders a comprehensive analysis of the materials and financial statements provided by the Company prior to this General Meeting.