Trinseo (TSE) Closes Aristech Buyout, Boosts Portfolio Offerings Posted byZacks Equity Research September 3, 2021 Leave a comment on Trinseo (TSE) Closes Aristech Buyout, Boosts Portfolio Offerings Trinseo’s (TSE) Aristech buyout is another step toward its transformation efforts, which are focused on becoming a global specialty materials and sust…