Ciech S.A.

Major Shareholding Notification • Sep 28, 2023

TheManagement Board of Ciech S.A. with its registered office in Warsaw (the_quot;Company_quot; or the _quot;Issuer_quot;), hereby informs,that on September 28, 2023 Issuer received from a Shareholder - KIChemistry S._#225; r.l. with its registered office in Luxembourg (the_quot;Shareholder_quot;) and the following parent entities of the Shareholder,i.e. Mr. Sebastian Kulczyk, Luglio Limited and Kulczyk Investments S.A.(_quot;Parent Entities_quot;) a notifications submitted pursuant to Article 69 and69a of the Act of 29 July 2005 on Public Offering, Conditions Governingthe Introduction of Financial Instruments to Organized Trading, andPublic Companies ("Act on Public Offering"), on the direct acquisitionby the Shareholder and indirect acquisitions by the Parent Entities of7,770,828sharesin the Company, representing approximately14,75%ofthe Company's share capital.

Beforethe acquisition, the Shareholder held directly, and the Parent Entitiesindirectly, owned_#160;40,947,891sharesin the Company, representing 77,70% of the Company's share capital;after the acquisition, the Shareholder holds directly, and the ParentEntities indirectly,48,718,719shares, which constitutes approximately92,45%of the Company's share capital.

Theshares in the Company held by the Shareholder entitle to exercise atotal of48,718,719votes at the Company's General Meeting, whichaccounts for approximately92,45%of the total number of votes atthe General Meeting.

Thenotifications received are attached to this report.

Legalbasis:

Art.70 point 1 of the Actof29 July 2005 on Public Offering, Conditions Governing the Introductionof Financial Instruments to Organized Trading, and Public Companies.