Rio Tinto starts $1.5B AP60 smelter expansion, adding 160kt low-carbon aluminium capacity

What happened

Rio Tinto has begun commissioning its $1.5 billion AP60 aluminium smelter expansion at Complexe Arvida in Quebec, with all 96 pots expected operational by end-2026, boosting annual primary aluminium capacity by ~160,000 metric tonnes. The project deploys Rio's state-of-the-art, low-carbon AP60 technology, aligning with its push to supply green aluminium for energy transition. However, given that aluminium generated only $1.5B in underlying EBITDA in 2024 versus iron ore's $16.2B and copper's $3.4B, this expansion is marginal to near-term group cash flows. The timing also comes when Rio's free cash flow is strained—$5.6B in 2024 against $7.0B dividends and $9.6B capex—and net debt has risen sharply to $14.6B as of mid-2025. While the project strengthens Rio's aluminium decarbonization credentials, it does not address the core thesis risk that iron ore cash generation remains the dominant near-term earnings driver.

Implication

Investors should view the smelter startup as a positive but low-conviction signal for Rio's 'green aluminium' narrative. The $1.5B spend and 160kt capacity will take years to materially impact EBITDA, while iron ore remains the key earnings lever amid China demand headwinds and rising Simandou supply. The expansion does not alter the WAIT rating: the stock's re-rating depends on near-term copper volume proof and stable Pilbara cash flow, not aluminium.

Thesis delta

The aluminium expansion is incremental and does not change the core thesis: Rio remains an iron-ore-driven cash generator funding a longer-dated copper story. The news reinforces Rio's technology leadership in low-carbon aluminium but does not address the 2026 copper volume trough or the tightening free cash flow profile. Wait for clearer copper ramp evidence and iron ore cost control before increasing exposure.