Lamb Weston is trading at $40.55, a -12.53% move after the September 22, 2026 regular session; no new company-specific catalyst has been identified. - A September 16 shareholder investigation into alleged ERP rollout disclosure issues remains a possible overhang, but available coverage does not directly link it to the after-hours decline. - Broader markets were mixed, offering no clear market-wide explanation for the move.