MASTERPLAST Nyilvánosan Működő Részvénytársaság

Report Publication Announcement • Dec 17, 2025

ANNOUNCEMENT

ALTEO Energy Services Public Limited Company (registered office: H-1117 Budapest, Dombóvári út 25.; company registration number: 01-10-045985; hereinafter referred to as: "Company") hereby announces its corporate events calendar for 2026, in line with the General Terms of Service of the Budapest Stock Exchange.

Event	Date
Investor presentation on the 2025 preliminary financial results*	16 February 2026
Publication of the notice of the General Meeting*	27 March 2026
Publication of the IFRS, consolidated, annual report and the non-consolidated, HAS annual reports of the companies of ALTEO Group (proposals to the General Meeting)*	2 April 2026
ALTEO Plc.'s Annual General Meeting to close the 2025 financial year (the Annual General Meeting is open to the press)*	28 April 2026
Investor presentation on the Q1 2026 financial results*	4 May 2026
Half year report and investor presentation on the H1 2026 financial results*	3 August 2026
Investor presentation on the Q3 2026 financial results*	2 November 2026

^* The dates shown in the table are planned and may be subject to change.

For further information please contact:

Szécsi Balázs e-mail: befektetoikapcsolatok@alteo.hu phone number: +36-1-236-8050

Budapest, 17. December 2025

ALTEO Plc.

Disclaimer: All information contained within this article is for information purposes only, and shall not be considered an official translation of the official communication referred to herein. This document does not include the integral wording of the official communication referred to herein, the original Hungarian language version of it remains to be the solely legally binding material in the subject matter. For further information, please do not hesitate to contact us.