NATIONALUM National Aluminium Company Ltd Legal Disputes Announcement 2026 - Regulatory Compliance Trading window for Nalco insiders is closed from 1 Apr 2026 until 48 hours after the Q4 FY2025-26 results; board meeting date to be announced later..Find Corporate Announcements for Press Releases, AGM, Insider Trading & SAST, Results and Corporate Action for National Aluminium Company Ltd