TheManagement Board of CIECH S.A. (the _quot;Issuer_quot; or _quot;CIECH_quot;),_#160;herewith informs that on 18 December 2023, CIECH Soda Deutschland GmbH_amp;_#160;Co. KG and CIECH Energy Deutschland GmbH (the "Subsidiaries")sold_#160;1.655.480units of CO2_#160;emission allowances(EUA), originating from free allocation and units previously purchasedfrom the market ("Sale of Allowances" and "EUAUnits" respectively). The market value of EUA Units sold amounts to113,1_#160;EURmillion (equivalent of PLN_#160;489,2 million)_#160;asper current value of a_#160;CO2_#160;emission allowance unit, i.e.68,30 EUR/EUA.

Atthe same time, the Subsidiaries concluded agreements securing thepurchase of1.655.480units of CO2_#160;emission allowanceson_#160;the forward market, with a_#160;settlement date in12April 2024("Hedging").

TheEntitlement Sale and the Collateral (collectively, the: _quot;Transaction_quot;)have a corresponding increase in the level of cash at the Subsidiariesand have the effect of reducing the CIECH Group's consolidated net debtby approximatelyPLN489,2 million calculated as of_#160;31December, 2023. The Transaction has an immaterial effect on the level ofconsolidated EBITDA.

Legalbasis:Article 17.1 of Regulation of the European Parliament and of the Council(EU) No. 596/2014 of 16 April 2014 on Market Abuse (the Market AbuseRegulation) and repealing Directive 2003/6/EC of the European Parliamentand of the Council and Commission Directives 2003/124/EC, 2003/125/ECand 2004/72/EC (Official Journal of the European Union L No. 173, p. 1).