Addleshaw Goddard Advised ORLEN S.A. On Its Acquisition Of 100% Of Shares In S54 Sp. Z O.O. From Synthos S.A.

Addleshaw Goddard advised ORLEN S.A. on its acquisition of 100% of shares in S54 sp. z o.o. from Synthos S.A.

Addleshaw Goddard is proud to have advised ORLEN S.A., one of Central and Eastern Europe’s largest energy companies and a regional leader in fuel retailing and refining, on its acquisition of 100% of shares in S54 sp. z o.o. from Synthos S.A., a leading European producer of synthetic rubber and polymer materials. S54 is currently constructing a butadiene extraction unit at Production Plant in Płock, Poland. The new facility will produce butadiene – a key raw material for synthetic rubber and other chemical products – and supply additional by-products, further supporting ORLEN’s growth in the sector.

The transaction, valued at approximately PLN 692 million (EUR 163 million), was signed and closed on 18 December 2025. It involved navigating a complex contractual landscape between ORLEN, Synthos, and S54, including the renegotiation of supply and offtake agreements.

The Addleshaw Goddard team was led by Adam Usiądek (Senior Associate), and Krzysztof Górny (Managing Associate), supervised by Marcin Schulz (National Managing Partner), and Cezary Wiśniewski (Partner), with support from our dedicated AG team, Jakub Kurach (Associate), Katarzyna Magnuska (Senior Associate), Barbara Wanat (Managing Associate), Piotr Jelito (Managing Associate), Jakub Dąbrowski (Counsel), Aleksandra Czubek (Associate), Szymon Sieniewicz (Counsel), Wojciech Podlasin (Counsel), Jakub Gerula (Associate), and Łukasz Burakowski (Managing Associate). EY acted as financial and tax advisor to ORLEN, and Rymarz Zdort Maruta advised the seller.

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