ATR −3.7%. Myers Industries +92.4%, Entegris +52.6%, Newell Brands +16.5%, Armstrong World Industries −15.6%. Weekly closes, Oct 17, 2025 = 100, log scale.

End-of-day closes (Databento EOD), the last close of each week. The four peers are the largest US-listed companies by market value in ATR’s SEC industry (Plastics Products, Nec) with a year of closes. It shows what the closes did; a move here is not a cause, a forecast or a call.