Alcoa Corp (AA) stock intrinsic value fair value estimate & owner earnings analysis

Alcoa mines bauxite, refines it into alumina and smelts aluminum. In 2025 it had sales of $12.8 billion: $8.5 billion from aluminum, $3.7 billion from alumina and $0.7 billion from bauxite. It is a price taker in commodity markets, so what it earns moves with aluminum, alumina and energy prices. Its record shows how far that swings: our measure of owner earnings (cash from operations, less working-capital swings, less stock compensation, less the capital spending needed just to keep operating) was positive in seven of the nine years from 2017 to 2025 and negative in two (2020 and 2023). How we measured earning power. Owner earnings ranged from a loss of about $508 million in 2023 to a gain of about $1.3 billion in 2017. The median of the nine years is about $618 million. We use the full span because the business is a cycle, and any shorter window would catch only a boom or a bust. On August 1, 2024 Alcoa bought Alumina Limited (about $2.7 billion), which owned the other 40% of its bauxite and alumina joint venture, and issued shares, so per-share figures for earlier years are on a smaller share count and a partly shared business. We therefore value the $618 million total across today's roughly 266 million diluted shares, not the per-share median. We then lower it by about $95 million because Alcoa now plans about $675 million a year of maintenance-type spending in 2026 (about $750 million in total including $75 million of growth projects), versus roughly $580 million of maintenance spending in 2025. That gives about $525 million, or about $1.97 per share, as the normal earning level. Growth-path check: owner earnings rose about 58% in 2025 (from about $392 million to about $618 million), but we start the base case at zero growth from the normal level, not at that rate, because that jump reflects higher aluminum prices and premiums in 2025 rather than a repeatable process. Base case ($25 per share). Earnings hold at about $1.97 per share for ten years, then fade about 4% a year, because the mines and smelters keep operating but the evidence for what replaces today's assets runs out. We give no credit for growth. The San Ciprian (Spain) smelter restart is under way (about 65% of its 228,000-tonne annual capacity at December 31, 2025, full restart expected by mid-2026), but the restart also raises 2026 costs and we cannot separate its net contribution, so we leave it out. We also give no credit for the higher U.S. Midwest premium: the 2025 tariff cost on Canadian metal imported into the United States was $571 million, and at recent pricing the premium fully covers it, so it adds no net benefit we can count on. Bear case ($4 per share). Aluminum prices fall back to conditions like 2019, 2020, 2023 and 2024, when owner earnings averaged only about $60 million a year. The tougher spending burden (Darling Range mine relocations are budgeted at $936 million out of $1.31 billion of sustaining capital over nine years) keeps earnings near $0.40 per share for ten years, then they fade 8% a year. Alcoa has $2.4 billion of debt against $1.6 billion of cash, asset-retirement obligations rose from $691 million to $1.12 billion in 2025, and it carries $1.1 billion of long-term derivative contract liabilities, all of which make a downturn harder to absorb. Bull case ($39 per share). Prices stay at the level seen in the strongest years (2017, 2021 and 2022), when owner earnings averaged about $1.1 billion. After allowing for today's higher spending, that is about $810 million or roughly $3.05 per share, held for ten years and then fading 4% a year. That is the level the business has already reached under good conditions, not a new one. What we left out. Alcoa sold its 25.1% stake in the Saudi Arabian aluminum joint venture in July 2025 for 85,977,547 shares of Ma'aden plus $150 million in cash; the shares were valued at $1.2 billion at closing (about $4.50 per Alcoa share) and the holding was carried at about $1.4 billion as noncurrent marketable securities at year-end. Because this is a non-operating holding whose future value is not in our earnings figure, it is not included in the cases above and would be additional value if sold. The Kwinana (Australia) refinery, closed permanently in September 2025, is also excluded, as is a favorable April 2025 Australian tax ruling that ended a claim of more than $800 million. Recent results and what would prove this wrong. In the first half of 2026 sales were $7.16 billion against $6.39 billion a year earlier and net income was $832 million against $712 million, but cash from operations was $429 million against $563 million and capital spending was $305 million against $224 million, so the higher earnings have not yet shown up as more cash. We have not lifted the earning level for that. We would be too pessimistic if aluminum prices and the Midwest premium remain at recent highs for many years; we would be too optimistic if the Western Australian mine approvals still under review, or the roughly $1.1 billion of long-term derivative contract liabilities, prove costlier than the filings now show. Because owner earnings depend heavily on prices Alcoa does not control, we treat the range between our bear and bull values as wide, and the margin-of-safety price is about $12 per share, roughly half the base case. Accounting notes. Stock-based compensation ($41 million in 2025) is treated as a real cost. Working-capital swings (receivables, inventories, payables, accrued expenses and taxes) are removed. Pension contributions and other long-term operating cash items are kept in as real costs. Growth capital is estimated from spending relative to sales and is removed from years when sales grew. No net debt is deducted from any case; debt is reflected in the bear case.