Advanced Drainage Systems is trading 18.82% up at $158.19, with no confirmed company-specific explanation for the move. - It compares with the September 25 close of $133.13. - The investor-relations press-release page lists its latest 2026 release as the September 14 sustainability report, with no September 28 or September 25 announcement shown. - Broader market context is negative and does not explain the sharp move higher.