| Metric | Jan 22, 2025 FY24 Q4 | Apr 16, 2025 FY25 Q1 | Jul 16, 2025 FY25 Q2 | Oct 22, 2025 FY25 Q3 | Jan 22, 2026 FY25 Q4 | Apr 16, 2026 FY26 Q1 | Jul 16, 2026 FY26 Q2 | Oct 15, 2026 FY26 Q3 |
|---|---|---|---|---|---|---|---|---|
| For FY2026 | ||||||||
| Alumina Segment Adjusted EBITDA sequential favorable net impacts | — | — | — | — | — | — | New“approximately $10 million” | — |
| Alumina Segment Adjusted EBITDA sequential unfavorable impacts | — | — | — | — | — | New“approximately $15 million” | — | — |
| Alumina Segment Adjusted EBITDA sequential unfavorable impacts | — | — | — | — | New“$30 million” | — | — | — |
| Aluminum Segment Adjusted EBITDA | — | — | — | — | — | — | New“favorable impacts from efficiencies at higher production rates to fully offset higher carbon prices and seasonally lower third-party energy sales in Brazil” | — |
| Aluminum Segment Adjusted EBITDA sequential favorable impacts | — | — | — | — | — | New“approximately $55 million” | — | — |
| Aluminum Segment Adjusted EBITDA sequential unfavorable impacts | — | — | — | — | New“$70 million” | — | — | — |
| Aluminum Segment Adjusted EBITDA unfavorable impacts (higher raw material costs and planned maintenance) sequentially | — | — | — | — | — | — | — | New“approximately $30 million” |
| Alumina costs in Aluminum segment sequential favorable impact | — | — | — | — | — | New“approximately $20 million” | — | — |
| Alumina costs in Aluminum segment sequential unfavorable impact | — | — | — | — | — | — | New“approximately $10 million” | — |
| Alumina costs in the Aluminum segment, unfavorable sequentially | — | — | — | — | — | — | — | New“approximately $30 million” |
| Alumina production projection | — | — | — | — | — | — | New“range between 9.5 and 9.6 million metric tons” | — |
| Alumina segment production | — | — | — | — | — | — | New“9.5 and 9.6 million metric tons” | Reiterated“9.5 to 9.6 million metric tons” |
| Alumina segment shipments | — | — | — | — | New“11.8 and 12.0 million metric tons” | — | Lowered“11.5 and 11.6 million metric tons” | Reiterated“11.5 to 11.6 million metric tons” |
| Alumina shipments projection | — | — | — | — | — | — | New“range between 11.5 and 11.6 million metric tons” | — |
| Aluminum segment production | — | — | — | — | — | — | — | New“2.4 to 2.6 million metric tons” |
| Aluminum segment shipments | — | — | — | — | New“2.6 and 2.8 million metric tons” | — | — | Reiterated“2.6 to 2.8 million metric tons” |
| Interest expense | — | — | — | — | — | — | — | New“$185 million” |
| Operational tax expense | — | — | — | — | — | — | — | New“$65 million to $75 million” |
| Operational tax expense | — | — | — | — | — | — | New“$80 million to $90 million” | — |
| Operational tax expense | — | — | — | — | — | New“$110 million to $120 million” | — | — |
| Operational tax expense | — | — | — | — | New“$65 million to $75 million” | — | — | — |
| Other income increase | — | — | — | — | — | — | — | New“approximately $20 million” |
| San Ciprián smelter restart completion | — | — | New“the restart will be completed by mid-2026” | — | — | — | — | — |
| Section 232 tariff costs on U.S. imports of aluminum from Canada sequential decrease | — | — | — | — | — | — | New“approximately $10 million” | — |
| Section 232 tariff costs on U.S. imports of aluminum from Canada sequential increase | — | — | — | — | — | New“approximately $35 million” | — | — |
| Total Alumina segment production | — | — | — | — | New“range between 9.7 and 9.9 million metric tons” | Reiterated“ranging between 9.7 to 9.9 million metric tons” | — | — |
| Total Alumina segment shipments | — | — | — | — | — | New“between 11.8 and 12.0 million metric tons” | — | — |
| Total Aluminum segment production | — | — | — | — | New“range between 2.4 and 2.6 million metric tons” | Reiterated“ranging between 2.4 and 2.6 million metric tons” | Reiterated“ranging between 2.4 and 2.6 million metric tons” | — |
| Total Aluminum segment shipments | — | — | — | — | — | New“between 2.6 and 2.8 million metric tons” | Reiterated“between 2.6 and 2.8 million metric tons” | — |
| For FY2025 | ||||||||
| Alumina Segment Adjusted EBITDA | — | New“expects to maintain the strong level of performance delivered in the first quarter 2025” | — | — | — | — | — | — |
| Alumina Segment Adjusted EBITDA sequential favorable impact (absence of asset retirement obligation charges, higher shipments, lower maintenance costs) | — | — | — | New“approximately $80 million” | — | — | — | — |
| Alumina Segment Adjusted EBITDA sequential favorable impacts | — | — | New“approximately $20 million” | — | — | — | — | — |
| Alumina Segment Adjusted EBITDA sequential impact (favorable, from absence of inventory write-down charge) | New“$30 million” | — | — | — | — | — | — | — |
| Alumina costs in Aluminum segment sequential favorable impact | — | — | New“approximately $100 million” | — | — | — | — | — |
| Alumina costs in Aluminum segment sequential favorable impact | — | New“$165 million” | — | — | — | — | — | — |
| Alumina costs in the Aluminum segment, sequential favorable impact | — | — | — | New“approximately $45 million” | — | — | — | — |
| Alumina segment shipments | New“13.1 and 13.3 million metric tons” | — | — | — | — | — | — | — |
| Aluminum Segment restart costs for San Ciprián smelter | — | New“$15 million” | — | — | — | — | — | — |
| Aluminum segment sequential tariff impact | — | — | New“sequential unfavorable impacts of approximately $90 million” | — | — | — | — | — |
| Aluminum segment sequential unfavorable impact (San Ciprián restart inefficiencies, lower third-party energy sales, partially offset by higher shipments) | — | — | — | New“approximately $20 million” | — | — | — | — |
| Aluminum Segment sequential unfavorable impact from U.S. Section 232 tariffs on imports of aluminum from Canada | — | New“$90 million” | — | — | — | — | — | — |
| Aluminum Segment sequential unfavorable impacts | New“$60 million” | — | — | — | — | — | — | — |
| Aluminum segment sequential unfavorable impacts (Section 232 tariffs) | — | — | New“approximately $90 million” | — | — | — | — | — |
| Aluminum segment shipments | New“2.6 and 2.8 million metric tons” | — | Lowered“to range between 2.5 and 2.6 million metric tons” | — | — | — | — | — |
| Aluminum shipments projection | — | — | New“range between 2.5 and 2.6 million metric tons” | — | — | — | — | — |
| Contributions to ELYSIS (increase, triggers loss recognition) | New“$25 million” | — | — | — | — | — | — | — |
| ELYSIS contributions sequential increase | New“$25 million” | — | — | — | — | — | — | — |
| Gain from Ma'aden transaction | — | — | New“approximately $780 million” | — | — | — | — | — |
| Gain on Ma'aden joint venture sale | — | — | New“approximately $780 million” | — | — | — | — | — |
| Operational tax benefit | — | New“$50 million to $60 million” | — | — | — | — | — | — |
| Operational tax expense | — | — | — | New“$40 million to $50 million” | — | — | — | — |
| Operational tax expense | — | — | New“$50 million to $60 million” | — | — | — | — | — |
| Operational tax expense | New“$120 million to $130 million” | — | — | — | — | — | — | — |
| Other expenses | — | — | New“expects Other expenses for the third quarter 2025 to remain consistent with the second quarter 2025” | — | — | — | — | — |
| Other expenses for the second quarter 2025 | — | New“increase approximately $10 million sequentially” | — | — | — | — | — | — |
| Other expenses for the third quarter 2025 | — | — | New“remain consistent with the second quarter 2025” | — | — | — | — | — |
| Other expenses sequential increase | — | New“approximately $10 million” | — | — | — | — | — | — |
| Profitability improvement program target | New“$645 million” | — | — | — | — | — | — | — |
| San Ciprián smelter cash used by operations | — | — | New“expected to approximate $110 million to $130 million” | — | — | — | — | — |
| San Ciprián smelter net loss (pre-tax and noncontrolling interest) | — | — | New“approximately $90 million to $110 million” | — | — | — | — | — |
| San Ciprián smelter net loss per common share | — | — | New“$0.35 to $0.42 per common share” | — | — | — | — | — |
| Tariff costs on higher U.S. imports of aluminum from Canada, sequential increase | — | — | — | New“approximately $50 million” | — | — | — | — |
| Total Alumina segment production | New“range between 9.5 to 9.7 million metric tons” | Reiterated“ranging between 9.5 to 9.7 million metric tons” | Reiterated“ranging between 9.5 to 9.7 million metric tons” | Reiterated“ranging between 9.5 to 9.7 million metric tons” | — | — | — | — |
| Total Alumina segment shipments | — | New“between 13.1 and 13.3 million metric tons” | Reiterated“between 13.1 and 13.3 million metric tons” | Reiterated“between 13.1 and 13.3 million metric tons” | — | — | — | — |
| Total Aluminum segment production | New“range between 2.3 and 2.5 million metric tons” | Reiterated“ranging between 2.3 and 2.5 million metric tons” | Reiterated“ranging between 2.3 and 2.5 million metric tons” | Reiterated“ranging between 2.3 and 2.5 million metric tons” | — | — | — | — |
| Total Aluminum segment shipments | — | New“between 2.6 and 2.8 million metric tons” | — | Lowered“between 2.5 and 2.6 million metric tons” | — | — | — | — |
| No period stated | ||||||||
| Massena smelter capital investment in anode baking furnace | — | — | — | New“approximately $60 million” | — | — | — | — |
| Ministerial decisions (Australia mine approvals) | — | — | — | New“expected by the end of 2026” | — | — | — | — |
| Ministerial decisions on Australia mine approvals | — | — | — | — | New“by the end of 2026” | — | — | — |
| Mosjøen casthouse upgrade project commissioning and ramp-up | — | — | — | — | — | — | New“scheduled to progress throughout 2028” | — |
| San Ciprián smelter restart completion | — | — | New“completed by mid-2026” | — | — | — | — | — |
| WA EPA assessment and recommendations publication | — | — | — | New“by June 2026” | — | — | — | — |