Alpek S.A.B. de C.V. Americas Styrenics LLC
Asahi Kasei Corporation
BASF SE
Chevron Phillips Chemical LLC
Eni S.p.A. INEOS Styrolution Group GmbH
Lanxess AG
Lotte Chemical Corporation
Lyondellbasell Industries Holdings B.V. Nizhnekamskneftekhim PJSC
Reichhold LLC
Repsol S.A. Saudi Basic Industries Corporation (SABIC)
Shell Chemical LP
Sibur Holding PAO
Synthos S.A. TotalEnergies SE
Trinseo S.A.