Sterling Infrastructure, Inc. (STRL) | The Buildout — AI Infrastructure
The Verdict
Sterling Infrastructure is an infrastructure services company that builds large-scale site development and electrical systems for data centers and semiconductor fabrication campuses. Its AI exposure is indirect but central: it prepares the land, utilities, roads, and electrical packages that AI compute and chip manufacturing require, rather than making chips or software itself.
| Market Cap | — |
| Revenue (TTM) | $2.9B |
| Revenue Growth | +37.0% |
| EBITDA Margin (TTM) | 20.1% |
| Net Cash | $170M |
| Earnings Beats | 7 of 7 |
| P/E (TTM) | — |
| EV/EBITDA (TTM) | — |
What We Like
- Full-year revenue guidance was raised twice in 2026, now at $4.0B–$4.15B.
- E-Infrastructure signed backlog plus unsigned awards and future phases exceeds $6B, with mission-critical work over 92% of signed backlog.
- First semiconductor fab award is over $500M, running ahead of schedule and framed as a multi-decade campus.
- Integrated site and electrical delivery is active on 3–4 data center projects, six to eight months ahead of plan.
- Transportation is deliberately harvested as a cash generator, with Q2 adjusted operating margin of 19.5% despite a 20% revenue decline.
What We’re Watching
- Management preannounced a possible Q3 2026 sequential backlog dip, framing it as award timing, not a change in demand.
- Electrician and project manager shortage is the binding constraint; management says it could grow faster with 1,000–2,000 more electricians.
- CEC's guided 300–500 bps margin improvement over 12–18 months is still unproven; if it stalls, mix dilution becomes real margin compression.
- The federal transportation funding cycle ends September 2026 while Transportation revenue is guided to a 7%–10% decline.
The thesis is strengthening: guidance has been raised twice, the first semiconductor fab award arrived, and cross-selling is ahead of schedule. The open question is whether management can add electricians and prefabrication capacity fast enough to convert a backlog it admits understates the pipeline, and whether the expected Q3 backlog dip stays a timing artifact.
Earnings Beat
Sterling reported Q2 2026 revenue growth of 90% y/y, with adjusted diluted EPS up 116% to $5.80. Adjusted EBITDA margin reached 22%, up 150 bps y/y. E-Infrastructure revenue grew 192% y/y and Transportation revenue declined 20% y/y by design.
| Metric | Q1 FY2026 | Q4 FY2025 | Q1 FY2025 | YoY |
|---|---|---|---|---|
| Revenue | $826M | $756M | $431M | +91.6% |
| Gross margin | 23.5% | 21.7% | 22.0% | +150bps |
| EBITDA | $165M | $138M | $75M | +120.8% |
| EPS | $3.10 | $2.81 | $1.28 | +142.3% |
| Book-to-burn (signed backlog) | 1.4x | 2.1x | n/a | — |
What we’re seeing ahead is going to be far greater than we originally anticipated.— Joseph A. Cutillo, CEO, 2026-08-04
Management tone: On the Q2 2026 call, management was confident and direct. It preannounced a likely Q3 backlog dip, explained the mix-driven margin optics with component-level detail, and was candid that electricians — not demand — are the binding constraint.
Management Guidance
Management raised full-year 2026 guidance for the second time. Revenue is guided to $4.0B–$4.15B, adjusted diluted EPS to $19.70–$20.30, and adjusted EBITDA to $891M–$916M. E-Infrastructure revenue growth is guided to over 100%, legacy site development to approaching 70% or higher, Transportation revenue to a 7%–10% decline, and Building Solutions to a modest decline. CapEx was raised to $130M–$140M.
Trajectory
Revenue direction is up and the pace is accelerating: Q4 FY2025 revenue was $756M, Q1 FY2026 was $826M, and Q2 2026 revenue grew 90% y/y. Margins are stable overall — Q1 FY2026 gross margin was 23.5% and EBITDA margin 20.0% — while the mix shifts toward lower-margin CEC electrical work. The driver is E-Infrastructure; Transportation is shrinking by design and Building Solutions is roughly flat.
The Model
The model projects FY+1 revenue of $3,850M with EBITDA of $855M (22.2% margin), and FY+2 revenue of $4,980M with EBITDA of $1,175M (23.6% margin). Near-term conversion is anchored by signed backlog of $4.3B and 70% of RPOs converting within 12 months; FY+2 assumes capacity additions and continued data center plus early semiconductor work.
| Metric | FY2025 | Next FY (E) | Following FY (E) |
|---|---|---|---|
| Revenue | $2.5B | $3.9B | $5.0B |
| YoY Growth | — | +54.6% | +29.4% |
| EBITDA | $491M | $855M | $1.2B |
| EBITDA Margin | 19.7% | 22.2% | 23.6% |
Projections are the median of 5 independent model runs. The model’s revenue sits 11.9% above analyst consensus.
Management raised full-year 2026 guidance for the second time. Revenue is guided to $4.0B–$4.15B, adjusted diluted EPS to $19.70–$20.30, and adjusted EBITDA to $891M–$916M. E-Infrastructure revenue growth is guided to over 100%, legacy site development to approaching 70% or higher, Transportation revenue to a 7%–10% decline, and Building Solutions to a modest decline. CapEx was raised to $130M–$140M.
What Could Go Right — and Wrong
- A second or third semiconductor fab award converts the first beachhead into a broader semiconductor wave.
- Hyperscalers convert multiyear capital plans into disclosed negotiated future-phase awards, lifting the >$7B visible pool.
- Integrated site and electrical projects scale beyond 3–4 through electrical acquisitions and modular capacity.
- CEC's 300–500 bps margin improvement materializes over 12–18 months.
- Modular/prefab capacity expands to additional U.S. locations within 18 months, relieving the electrician constraint.
- CEC margin improvement stalls, making mix dilution genuine margin compression.
- A hyperscaler capital-spending pause or data center moratorium wave hits actual schedules.
- An execution miss on a mega project damages future-phase negotiating position.
- Electrician hiring and acquisitions overrun demand, turning fixed-cost discipline into a drag.
Looking Ahead
Over the next 12 months, the path runs through Q3 2026 semi fab revenue and a possible backlog dip, then stronger Q4 2026 and early 2027 awards. CEC's 300–500 bps margin improvement and modular capacity expansion are the operational levers; Pacific Northwest activity ramps in 2027–2028.
- Q3 2026Semi fab revenue ramp — First semiconductor fab revenue appears; possible sequential backlog dip.
- Q4 2026 / early 2027Stronger awards — Backlog re-accelerates; manufacturing pipeline may convert.
- 12–18 monthsCEC margin improvement — CEC 300–500 bps improvement; low-margin exits complete.
- Next 18 monthsModular capacity expansion — Second prefab site identified or operational.
- 2027–2028Pacific Northwest ramp — Stone Ridge contribution and PNW awards; fab first phase completion.
- Late 2020sPharma and semiconductor waves — Pharma around 2028; semis around 2030.
Financials
Annual Summary
| Metric | FY2024 | FY2025 | TTM | YoY |
|---|---|---|---|---|
| Revenue | $2.1B | $2.5B | $2.9B | +17.7% |
| Gross Margin | 20.0% | 22.9% | 23.3% | +290bps |
| EBITDA | $333M | $491M | $1.9B | +47.2% |
| EBITDA Margin | 15.8% | 19.7% | 20.1% | +395bps |
| Net Income | $257M | $290M | $347M | +12.7% |
| Free Cash Flow | $416M | $361M | $1.8B | — |
| Net Cash | — | — | — | — |
Key Ratios (Trailing)
- P/E TTM—
- EV/EBITDA TTM—
- EV/Revenue TTM—
- Price/FCF TTM—
- Gross Margin (TTM)23.3%
- EBITDA Margin (TTM)20.1%
- Net Margin (TTM)12.0%
- ROIC38.5%
- FCF Conversion75.8%
- SBC / Revenue0.7%
The Company
Sterling Infrastructure operates through three U.S. segments: E-Infrastructure Solutions, Transportation Solutions, and Building Solutions. E-Infrastructure provides advanced, large-scale site development services and mission-critical electrical services for data centers, semiconductor fabrication, manufacturing, distribution centers, warehousing, and power generation.
The strategic center of gravity has shifted to E-Infrastructure. In Q1 2026, E-Infrastructure was 72% of total revenue, Transportation 16%, and Building Solutions 12%, up from 51% / 28% / 21% a year earlier. Sterling operates from offices in Texas, Georgia, New Jersey, Utah, and Arizona, and integrates site development and electrical work through the acquired CEC platform.
Business Segments
Competitive Landscape
Sterling's competitive dynamic is shaped by large, mission-critical projects where management says it wins on speed and execution, not price. Future-phase work is generally negotiated with the customer, and management says it has not lost future-phase work. Management has not seen an influx of major new players on the large jobs; smaller players win smaller data center work Sterling generally does not pursue.
- Everus's public disclosure states it faces competition from large publicly traded U.S. construction companies including Sterling.
Supply Chain
Sterling sits between hyperscale and semiconductor customers and a network of materials and equipment suppliers. It relies on third-party suppliers for substantially all materials and on third-party subcontractors for some project work.
More on STRL: Earnings recap