US materials company Trinseo opened for trading on 12 June on the New York Stock Exchange (NYSE). Goldman, Sachs & Co., Deutsche Bank Securities Inc., Citigroup and Morgan Stanley & Co. LLC acted as joint book-running managers and the representatives of the underwriters. Upon the closing of the offering, the company expects to raise US$218.5 million in gross proceeds by offering 11,500,000 shares.

Previously called Styron, the company announced plans to change the name of all Styron affiliated companies to Trinseo. Some, but not all, of the Styron companies have completed the name change process and are currently known as Trinseo; Styron companies that have not completed this process will continue to do business as Styron until their respective name changes are complete. Styron's operating companies also continue to do business as Styron at this time.

Trinseo manufactures plastics, latex and rubber. Trinseo's technology is used by customers in industries such as home appliances, automotive, building & construction, carpet, consumer electronics, consumer goods, electrical & lighting, medical, packaging, paper & paperboard, rubber goods and tyres.

Trinseo is owned by Bain Capital that bought it from Dow Chemical for US$1.63 billion in 2010.