STLD vs TX: Which Is the Better Buy in 2026?

Same yardstick, side by side (as of August 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: TX 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. STLD and TX 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 STLD and TX 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.

Steel Dynamics is a Fort Wayne, Indiana based steel producer and metals recycler, one of the largest in the United States. It makes steel almost entirely through electric arc furnaces (EAFs), which melt scrap rather than iron ore, a lower-cost and lower-emission model than traditional blast furnaces. The company operates across three legs: steel operations (flat-rolled, long products, and specialty shapes), metals recycling through its OmniSource network that feeds scrap into the mills, and steel fabrication (joists and decking). In 2025 it added a fourth leg by starting up a $2.7 billion aluminum flat-rolled mill in Columbus, Mississippi, aimed at the beverage-can and automotive markets.

Full STLD guide

Ternium S.A. (NYSE: TX) makes flat steel: hot-rolled, cold-rolled, galvanized and color-coated coil sold to carmakers, appliance manufacturers, pipe makers and construction distributors across the Americas. Its industrial system runs through Ternium Mexico (mills and twelve distribution centers concentrated in Nuevo Leon, plus the Pesqueria Industrial Center), Ternium Brasil (a ~5.0 million ton slab plant in Rio de Janeiro), Ternium Argentina, and a consolidated controlling position in Usiminas, Brazil's largest flat steel producer. A second segment mines and sells iron ore in Mexico and Brazil, giving the company unusual raw material self-supply for its size. Steel shipments were ~15.1 million tons in 2025 and mining shipments ~13.0 million tons, with headcount of ~33,253 at year end.

Full TX guide

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

• STLD drivers: Low-cost EAF steel operations; Aluminum expansion into can and auto sheet.
• TX drivers: Mexican import substitution; The Pesqueria steel shop finishing.

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 biggest risk is cyclicality: steel and aluminum prices swing with construction, autos, and the broader economy, and a downturn can compress the price-to-scrap spread that drives profits. For TX, steel is cyclical and Ternium is a price taker: 2025 adjusted EBITDA fell ~24% year over year on lower prices, and the same mechanism works in reverse.

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 STLD if you believe its drivers more; TX 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 STLD and TX guides.

STLD. Steel Dynamics generated about $18.2 billion of net sales and $1.2 billion of net income in 2025, down from $1.5 billion in 2024 as steel prices eased. The first quarter of 2026 rebounded sharply, with $5.2 billion in sales and $403 million of net income on record shipments and firmer prices. At roughly $33 billion of market value the shares trade around 24 times trailing earnings, a valuation that reflects both the recent earnings rebound and the depressed base year.

TX. At a market capitalization of ~$10.8B on ~196 million ADSs, TX trades at roughly ~15x trailing earnings per ADS and under ~1x the ~$12.3 billion of equity attributable to parent shareholders. Trailing earnings blend a weak second half of 2025 with a much stronger first half of 2026, so the multiple looks high against the current run rate and low against the 2025 trough. The balance sheet moved from ~$712 million of net cash at the end of 2025 to ~$112 million of net debt by June 2026 as capital spending and the May dividend went out the door.

Headline figures (approximate, JULY 2026): STLD shows revenue (2025) ~$18.2B, net income (2025) ~$1.2B, diluted eps (2025) ~$7.99, q1 2026 net sales ~$5.2B; TX shows revenue (ttm) ~$16.0B, adjusted ebitda (ttm) ~$2.0B (~12% margin), earnings per ads (ttm) ~$3.57, market capitalization ~$10.8B.

STLD and TX 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 STLD and TX exposure against your real portfolio. It is not an investment adviser.