AA vs TECK: Which Is the Better Buy in 2026?

Same yardstick, side by side (as of October 2026). Valuation lined up like this is most meaningful for two names in the same corner of the market, which these are. Figures are approximate; verify before investing.

Reading it: AA is the cheaper of the two on forward earnings, but cheaper is not the same as better. Pair the valuation with growth (how far the forward P/E sits below the trailing P/E) and risk (beta) before you decide.

The metrics above tell you which is the marginally better business. The bigger risk for most people is not picking the slightly worse stock, it is over-concentrating. AA and TECK share themes, so owning both, or adding either to what you already hold, can quietly push a large share of your portfolio into one bet.

This is the part a generic comparison page cannot answer, because it depends on what you own. Connect your brokerage and Walnut shows your real, combined AA and TECK exposure, flags overlap with your existing positions, and tells you if adding one would tip you past a concentration you are comfortable with, read-only by default, with your login staying at your broker. Walnut is not an investment adviser.

Alcoa Corporation is one of the world's largest upstream aluminum companies, running the full chain from bauxite mining to alumina refining to aluminum smelting. It reports in two segments: Alumina (about 2.5 million metric tons produced in Q3 2026) and Aluminum (about 649,000 metric tons in the same quarter). Because it sells raw and semi-finished metal into global markets, Alcoa is a price-taker: its revenue and margins are driven mainly by the London Metal Exchange aluminum price and the alumina price index, plus its own energy and raw-material costs. That makes it different from downstream fabricators like Arconic that sell finished, engineered products at steadier margins.

Full AA guide

Teck Resources is one of Canada's largest diversified miners, headquartered in Vancouver, with its Class B subordinate voting shares listed on the NYSE under TECK. Over 2024 the company sold its steelmaking (metallurgical) coal business, Elk Valley Resources, to a Glencore-led consortium (Glencore took a 77% interest and Nippon Steel 20%) for roughly US$7.3 billion, closing in July 2024. That deal transformed Teck from a coal-and-metals conglomerate into a base-metals company centered on copper and zinc, and it directed the proceeds toward share buybacks, debt reduction, and copper growth. Its core assets include the Quebrada Blanca (QB) mine in Chile, Highland Valley Copper in British Columbia, a 22.5% stake in Antamina in Peru, Carmen de Andacollo in Chile, and the Red Dog zinc mine in Alaska paired with the Trail smelter.

Full TECK guide

Both fit overlapping themes, but they are not interchangeable. The useful comparison is which set of drivers and risks you want exposure to.

• AA drivers: Aluminum price and supply gap; Restarts and higher volumes.
• TECK drivers: Copper as the growth engine; The Anglo American merger of equals.

A faster-growing, richer-valued name usually swings harder, so it suits a longer horizon and a higher tolerance for volatility; a steadier, more cash-generative business suits a more conservative or income-minded investor. The honest test is which set of risks you could hold through a drawdown: The dominant risk is commodity price cyclicality: with revenue tied to aluminum and alumina indices, a global slowdown or a swing in Chinese supply can compress earnings quickly, and the stock's roughly 23% decline in 2026 despite higher profits shows how fast sentiment can turn. For TECK, teck's results are highly sensitive to copper and zinc prices, which are cyclical and driven by global growth, Chinese demand, and the US dollar, so a downturn can compress earnings quickly.

Growth-minded investors who believe the theme has years to run tend to accept the richer multiple for more upside; value-minded investors lean toward the cheaper forward earnings and steadier profile. Pick AA if you believe its drivers more; TECK if you believe its. Many investors hold both, but since they share themes, that is a concentrated bet, not diversification. Decide deliberately and check overlap. For the full detail, see the AA and TECK guides.

AA. Figures are approximate and tied to the asOf date; verify live numbers before acting. For a cyclical producer, a forward P/E under 8x can be a trap because it reflects strong-cycle earnings that consensus already expects to fall about 18% in 2027, so the multiple says more about where aluminum prices sit than about the company. Analyst targets around $60 imply upside from the mid-October price, but that view is a bet on the commodity as much as on Alcoa.

TECK. As of October 16, 2026, Teck trades at about 18 times trailing earnings and under 6 times EV/EBITDA, multiples that reflect a cyclical miner near a copper-price peak in earnings. Because Teck holders are due about 1.3301 Anglo American shares per Teck share, the price also moves with Anglo's shares and the odds of Chinese approval. Q3 2026 results on October 29, 2026 are the next data point, with consensus EPS near $1.45.

Headline figures (approximate, October 2026): AA shows revenue (ttm) ~$14.3 billion (Q3 2026 ~$3.70 billion, up ~24% year over year), net income (ttm) ~$1.5 billion (Q3 2026 ~$483 million); net margin ~11%, adjusted eps (q3 2026) ~$1.82 vs ~$1.51 consensus; trailing EPS ~$4.81, operating margin ~16% (gross margin ~23%); TECK shows revenue (ttm) ~$14.0B, up ~78% YoY in the latest quarter, net income (ttm) ~$2.5B; operating margin ~43%, q2 2026 Revenue ~$3.6B, net income ~$854M; adjusted EPS $1.93 vs ~$1.41 expected, p/e (trailing / forward) ~17.8x / ~17.1x.

AA and TECK are related but distinct: same themes, different businesses and risks. Neither wins in the abstract; the right pick is whichever thesis you actually believe, sized so you are not over-concentrated in one theme. Walnut can show your combined AA and TECK exposure against your real portfolio. It is not an investment adviser.