Trinseo announced that Martin Pugh, Executive Vice President and Chief Operating Officer of Trinseo, will retire effective March 1, 2017. The COO position was established as an interim role in 2015 while Trinseo integrated a number of strategic initiatives into the business. Tim Stedman, Senior Vice President and Business President for Basic Plastics and Feedstocks, and Hayati Yarkadas, Senior Vice President and Business President for Performance Materials, will now report directly to Chris Pappas, President and CEO of Trinseo.