Trinseo 50%
Chevron Phillips Chemical Company 50%

Americas Styrenics was formed in 2008 as a 50/50 joint venture between The Dow Chemical Company and Chevron Phillips. After Trinseo became an independent company, it assumed Dow's ownership share in the JV.

The Woodlands, Texas

Cartagena, Colombia; 
Gales Ferry, Connecticut;
Ironton, Ohio;
Joliet, Illinois;
Marietta, Ohio;
St. James, Louisiana;
Torrance, California;

Polystyrene and Styrene