Alumina prices averaged USD 354 per metric ton in September, up 0.4% from August. On 30 September, the commodity traded at USD 360 per metric ton, up 1.9% from 31 August.
In September, average alumina prices rose for the fourth straight month, reaching the highest level in over a year. This increase was likely supported by Rio Tinto’s production caps at the Australian Yarwun refinery, which will cut about 40% of its alumina production, equivalent to 3% of global seaborne supply.
This chart displays Alumina (US$/mt) from 2024 to 2026.
Alumina COMEX (prices in US$/mt, aop)
| Q1 2024 | Q2 2024 | Q3 2024 | Q4 2024 | Q1 2025 | Q2 2025 | Q3 2025 | Q4 2025 | Q1 2026 | Q2 2026 | Q3 2026 | Q4 2026 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Alumina COMEX | - | - | - | 695 | 534 | 356 | 358 | 316 | 307 | 308 | 347 | - |