Steel Dynamics, Inc. (STLD) | The Buildout — AI Infrastructure
The Verdict
Steel Dynamics runs electric arc furnace steel mills, a metals recycling network, a steel joist and deck fabrication business, and a new recycled aluminum flat-rolled mill. It sells commodity steel and aluminum, but its role in the AI buildout is indirect: data-center and other non-residential construction consumes its structural long products and its joists and deck. The company does not make AI hardware and does not sell to data centers as a customer segment it discloses. It also does not report AI-specific revenue, so the size of the AI-linked slice cannot be measured from its filings.
| Market Cap | — |
| Revenue (TTM) | $20.5B |
| Revenue Growth | +19.8% |
| EBITDA Margin (TTM) | 13.5% |
| Net Debt | $3.6B |
| Earnings Beats | 4 of 7 |
| P/E (TTM) | — |
| EV/EBITDA (TTM) | — |
What We Like
- Steel operations generated $721 million of operating income in Q2 2026, up 30% sequentially, on record shipments of 3.7 million tons.
- Value-added steel spreads improved $70 per ton from Q4 2025 lows; the galvanized-to-hot-rolled spread roughly doubled from below $100 at the start of the year to a little over $220.
- Steel fabrication order backlog is 45% higher than a year ago and volume-specific, and the Dodge Momentum Index is up more than 30% year over year.
- Management estimates its growth projects — the Sinton steel mill, value-added coated lines and the aluminum platform — carry over $1.4 billion of through-cycle annual EBITDA capability.
- Management says capital funding for the growth program is substantially complete, shifting focus to operational optimization, with 2027 capex framed at $500 million-$600 million at maximum.
What We’re Watching
- Aluminum ramp: Q2 shipments of 53,000 metric tons missed the 60,000-70,000 guide, the second CASH line slipped from Q3 to Q4 2026, and a slab-center relocation added a $16 million impairment and delayed internal slab supply to H1 2027.
- Fabrication margin: operating income fell from $90 million in Q1 to $85 million in Q2 as higher steel input costs outpaced pricing, with the benefit deferred to Q4 2026 and 2027.
- Aluminum customer concentration: the 10-Q states that aluminum operations depend on a core group of significant customers.
The steel side of the thesis is strengthening: record shipments, wider value-added spreads, and roughly 80% of flat-rolled volume on contracts that lag price changes by about two months, which pushes recent increases into Q3 2026. The aluminum side is mixed — the operating loss narrowed 48% sequentially to $33 million, but the ramp has slipped on shipments, CASH-line timing, and internal slab supply. The two variables most capable of moving the business are the aluminum ramp's profitability and the durability of trade-protected steel pricing. The open question is whether aluminum turns earnings positive in H2 2026 and exits the year at the guided 90%-of-capacity rate.
Earnings Beat
In Q2 2026 Steel Dynamics reported revenue of $6.1 billion and gross margin of 15.7%, with net income of $534 million, or $3.69 per diluted share. The standout was record quarterly steel shipments of 3.7 million tons and steel operations operating income of $721 million, up 30% sequentially on a $105-per-ton sequential rise in average selling price. Aluminum shipped 53,000 metric tons and reported a $33 million operating loss, a 48% sequential improvement, plus a $16 million non-cash impairment tied to relocating the second planned recycled slab center.
| Metric | Q2 FY2026 | Q1 FY2026 | Q2 FY2025 | YoY |
|---|---|---|---|---|
| Revenue | $6.1B | $5.2B | $4.6B | +33.4% |
| Gross margin | 15.7% | 14.7% | 13.5% | +220bps |
| EBITDA | $925M | $747M | $516M | +79.3% |
| EPS | $3.70 | $2.79 | $2.00 | +84.9% |
| Aluminum flat-rolled sheet shipments (metric tons) | 53,000 | 22,500 | n/a | — |
The 650,000 metric ton project is no longer a vision. It's clearly here clearly having a positive impact in the industry.— Mark Millett, Chief Executive Officer, 2026-07-21
Management tone: Management's tone on steel stayed confident and record-driven, moving from Q1's record 3.6 million tons and $557 million of steel operating income to Q2's 3.7 million tons and $721 million. On aluminum, management acknowledged the Q2 shipment miss openly and framed it as packaging and learning-curve friction, while holding its forward slope: earnings positive in H2 2026 and an exit-2026 rate of at least 90% of capacity. Management acknowledged that today's aluminum spreads are considerably higher than the $650 million-$700 million through-cycle target but deferred a higher number until the ramp is dialed in. The tone on data centers shifted between the two calls, from a named construction demand driver in April to primarily an electricity-cost and grid-reliability concern in July.
Management Guidance
Management guides aluminum earnings positive in H2 2026 and a monthly exit-2026 production rate of at least 90% of capacity. The second automotive CASH line is expected to start commissioning in Q4 2026, and the relocated second cast house is guided to 100% utilization in the first half of 2027. H2 2026 capital investments are guided to $300 million-$350 million, with full-year 2026 capex around $600 million and 2027 framed at $500 million-$600 million at maximum with sustained capital of $250 million-$300 million. Management expects steel fabrication pricing improvement in Q4 2026 and into 2027, scrap pricing relatively steady in coming months, and working capital to be a funding source to neutral in H2 2026.
Trajectory
Revenue has risen for two straight quarters, from $4.4 billion in Q4 2025 to $5.2 billion in Q1 2026 and $6.1 billion in Q2 2026. EBITDA moved from $457 million to $747 million to $925 million over the same span, and gross margin went from 11.8% to 14.7% to 15.7%. The driver is higher realized steel pricing on record volume: the Q2 steel average selling price rose $105 per ton sequentially and value-added spreads improved $70 per ton from Q4 2025 lows, while scrap prices stayed relatively steady. Fabrication margins lagged as higher steel input costs offset volume, and aluminum remains loss-making while it ramps. About 80% or more of flat-rolled business is on contracts that lag price changes by roughly two months, so recent increases still flow into Q3 2026.
The Model
The model projects FY+1 revenue of $24,411 million with EBITDA of $3,637 million, a 14.9% margin. For FY+2 it projects revenue of $28,430 million and EBITDA of $4,435 million, a 15.6% margin. The near-term anchor is the steel pricing and spread levels carried into the next twelve months plus the aluminum ramp turning profitable. The FY+2 step-up assumes the aluminum mill reaches full volume capability and its optimized product mix, alongside continued steel demand from non-residential construction.
| Metric | FY2025 | Next FY (E) | Following FY (E) |
|---|---|---|---|
| Revenue | $18.2B | $24.4B | $28.4B |
| YoY Growth | — | +34.3% | +16.5% |
| EBITDA | $2.0B | $3.6B | $4.4B |
| EBITDA Margin | 11.2% | 14.9% | 15.6% |
Projections are the median of 5 independent model runs. The model’s revenue sits 17.0% above analyst consensus.
Management guides aluminum earnings positive in H2 2026 and a monthly exit-2026 production rate of at least 90% of capacity. The second automotive CASH line is expected to start commissioning in Q4 2026, and the relocated second cast house is guided to 100% utilization in the first half of 2027. H2 2026 capital investments are guided to $300 million-$350 million, with full-year 2026 capex around $600 million and 2027 framed at $500 million-$600 million at maximum with sustained capital of $250 million-$300 million. Management expects steel fabrication pricing improvement in Q4 2026 and into 2027, scrap pricing relatively steady in coming months, and working capital to be a funding source to neutral in H2 2026.
What Could Go Right — and Wrong
- Aluminum exits 2026 at or above its 90%-of-capacity guide and turns earnings positive in H2 2026 ahead of plan.
- Steel spreads stay normalized and the roughly 80% of flat-rolled volume on lagging contracts rolls into higher prices through Q3 2026.
- The 45% fabrication backlog converts with price as well as volume over the next six to nine months.
- The Section 301 exclusion of Brazilian pig iron imports, plus ample domestic scrap supply, keeps scrap pricing relatively steady and supports the steel metal spread.
- Management quantifies and raises the $650 million-$700 million through-cycle aluminum EBITDA target, since today's spreads are above it.
- Aluminum slips again — a further push-out of the second CASH line, the relocated cast house, or the 90% exit rate.
- Global steelmaking overcapacity and increased steel imports pressure domestic pricing and the metal spread.
- Fabrication margin compression persists if steel input costs keep rising faster than project pricing.
- Scrap re-couples with steel prices, compressing the metal spread that drives steel margins.
- Aluminum's concentrated customer base limits pricing power and adds revenue volatility through the ramp.
Looking Ahead
Over the next twelve months the story hinges on two things: whether the aluminum mill turns profitable and hits its guided exit rate, and whether steel spreads hold. Management has guided aluminum earnings positive in H2 2026 with a monthly exit rate of at least 90% of capacity, and the second CASH line starting commissioning in Q4 2026. Fabrication pricing is guided to improve in Q4 2026 and into 2027. A leadership transition takes effect January 1, 2027, when Theresa Wagler becomes President and Chief Executive Officer and Mark Millett becomes Executive Chairman.
- H2 2026Aluminum turns profitable — Tests whether the aluminum ramp reaches earnings-positive as guided.
- Q4 2026Second CASH line commissioning — Tests whether the slipped automotive line starts on schedule.
- Q4 2026Fabrication pricing realization — Tests whether the 45% volume backlog converts at improved prices.
- January 1, 2027CEO transition takes effect — Tests whether strategy and disclosure language change under new leadership.
- 2027Aluminum full capability — Tests whether the mill reaches its full 650,000-ton annual capability.
Financials
Annual Summary
| Metric | FY2024 | FY2025 | TTM | YoY |
|---|---|---|---|---|
| Revenue | $17.5B | $18.2B | $20.5B | +3.6% |
| Gross Margin | 15.7% | 13.0% | 14.6% | 270bps |
| EBITDA | $2.4B | $2.0B | $2.8B | -16.3% |
| EBITDA Margin | 13.8% | 11.2% | 13.5% | 265bps |
| Net Income | $1.5B | $1.2B | $1.6B | -22.9% |
| Free Cash Flow | −$24M | $502M | $956M | — |
| Net Cash | — | — | — | — |
Key Ratios (Trailing)
- P/E TTM—
- EV/EBITDA TTM—
- EV/Revenue TTM—
- Price/FCF TTM—
- Gross Margin (TTM)14.6%
- EBITDA Margin (TTM)13.5%
- Net Margin (TTM)7.8%
- ROIC13.2%
- FCF Conversion34.4%
- SBC / Revenue0.2%
The Company
Steel Dynamics is, in its 10-K's words, a leading industrial metals solutions company with facilities throughout the United States and Mexico. It runs a circular manufacturing model, using recycled scrap as the primary input. Revenue comes from making and selling steel, processing and selling recycled ferrous and nonferrous metals, and fabricating steel joists and deck. It recently added aluminum operations, supplying recycled-content flat-rolled aluminum to the countercyclical beverage can industry plus automotive and industrial markets. Its steel and fabricated products reach the AI buildout only indirectly, through data-center and non-residential construction demand.
The company operates through integrated segments. Steel Operations runs electric arc furnace mills that make steel from ferrous scrap and scrap substitutes, using continuous casting and automated rolling mills, plus coating, processing and warehouse operations. Metals Recycling processes ferrous and nonferrous scrap, positioned near the company's own mills and aluminum operations. Steel Fabrication operates seven New Millennium Building Systems plants serving non-residential construction. Aluminum Operations includes a 650,000-metric-ton recycled flat-rolled mill in Columbus, Mississippi, two 150,000-metric-ton satellite slab centers, and a recycled deox-rod facility. Management describes the company as the largest flat-rolled steel coater in North America and the largest North American metals recycler.
Business Segments
Competitive Landscape
Steel Dynamics competes in commodity steel and aluminum markets. Its 10-Q risk list names significant price and other forms of competition from other steel and aluminum producers, scrap processors and alternative materials, and flags global steelmaking overcapacity and imports of steel. Management points to a value-added product mix, a fabrication platform it says lets its mills run at higher through-cycle utilization rates than peers, and scale — in its own words, the largest flat-rolled steel coater in North America and the largest North American metals recycler. Competitors named across the filings and relationship map include Nucor, Commercial Metals, Gerdau, U.S. Steel, ArcelorMittal, Novelis and BlueScope.
- NucorNamed as a competitor for structural steel and fabricated products; management said Nucor's plate-market entry leaves that market well served.
- Commercial MetalsNamed as a competitor; listed in the relationship map for long products for data-center foundations.
- GerdauGerdau's own filing names Steel Dynamics among its principal competitors.
- U.S. SteelNamed in filings as a competitor and as a plate supplier; not discussed.
- NovelisNamed as an aluminum competitor; not discussed.
Supply Chain
Steel Dynamics sits early in the metals chain, taking scrap, pig iron and natural gas and selling steel and aluminum to manufacturers, distributors and construction. Its own recycling network supplies its mills and aluminum operations.
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