US private equity investor Bain Capital has divested its remaining stake in Trinseo, the former Dow Chemical styrenics business carved out of the US chemical giant in 2010 as Styron. Dow initially retained a small stake until the company was listed on the New York stock exchange in 2014.

Bain’s exit, announced on Sept. 19, represents a major milestone in the Berwyn, Pennsylvania-based company’s six-year journey from carve-out and spin-off to full independence, Trinseo CEO Chris Pappas said. With annual sales of around $4 billion the back-integrated manufacturer of polystyrene, and engineering polymers ABS and SAN in addition to rubber and latex operates 18 global manufacturing sites and employs around 2,200 people.