Sterling Infrastructure, Inc. (STRL) | The Buildout — AI Infrastructure
The Verdict
Sterling Infrastructure is a U.S. construction contractor that prepares the ground and installs the systems for very large industrial projects. On a data center campus its crews move earth, install underground utilities and duct banks, pour concrete and build roads and paving; through CEC, the electrical contractor it acquired, they also perform the mission-critical electrical construction inside the same site, including prefabricated and modular electrical work. Sterling does not build the data hall, the servers or the IT gear — it is the contractor on the ground beneath the AI buildout, and the same site-development playbook now applies to semiconductor fabrication campuses and large manufacturing plants. Its other two segments, transportation infrastructure and residential and commercial concrete, are not exposed to that buildout.
| Market Cap | — |
| Revenue (TTM) | $3.4B |
| Revenue Growth | +60.8% |
| EBITDA Margin (TTM) | 20.8% |
| Net Cash | $128M |
| Earnings Beats | 7 of 7 |
| P/E (TTM) | — |
| EV/EBITDA (TTM) | — |
What We Like
- Mission-critical work — data centers, semiconductor and large manufacturing — was more than 92% of E-Infrastructure signed backlog in Q2 2026, up from over 90% the prior quarter, and the E-Infrastructure aggregate pipeline exceeds $6B, up $2.7B since year-end 2025.
- E-Infrastructure revenue grew 192% year over year in Q2 2026, after 174% in Q1, and FY2026 growth guidance was raised to over 100%; consolidated revenue growth is guided to 64% at the midpoint.
- The order book covers the near term: organic signed backlog rose 50% year over year despite strong burn.
- Selectivity shows in the numbers: Transportation revenue fell 20% in Q2 2026 while its adjusted operating margin rose to 19.5%, up more than 500 basis points, as Sterling walked away from low-bid highway work.
- The balance sheet was rebuilt for capacity: the revolver was extended and expanded to $1.5B with maturity in July 2031 and the term loan repaid, leaving $464.5M of cash and $127.6M of net cash at June 30, 2026.
What We’re Watching
- Q3 2026 awards: management pre-announced softer third-quarter awards and a possible sequential backlog decline, calling it timing rather than demand, and points to stronger awards in Q4 2026 and early 2027.
- E-Infrastructure margin mix: site development runs in the "upper 20s" and CEC about 12%, so CEC's faster growth dilutes the blended figure; FY2026 segment margin guidance holds at mid-20%.
- Capacity: electricians are the binding constraint, management said site-side labor was "really tight" for the first time in Q2 2026, and the electrical apprenticeship is a four-year program.
- An 8-K under Item 5.02 filed 2026-05-21 reporting a director or officer change is flagged as material with impact unclear, and is unresolved in the source material.
The thesis reads as strengthening rather than static. Sterling raised FY2026 guidance twice in roughly three months across revenue, EPS, EBITDA and CapEx; E-Infrastructure's mission-critical share of signed backlog moved above 92%; and a semiconductor fabrication campus became the company's first project in that end market rather than a prospect. The risks are specific and identifiable — labor capacity, margin mix, and two shrinking legacy segments — but none of them is currently a demand problem. The open question is whether the pre-announced sequential decline in Q3 2026 backlog is award timing, as management says, or the start of a change in order cadence.
Earnings Beat
On its Q2 2026 call Sterling reported revenue of $1,168.2M, up 90% year over year, with gross margin of 24.2%. The standout was the order book: signed backlog reached $4.3B, up 116%, and combined backlog $5.6B, up 150%, with book-to-burn of 1.4x on signed backlog. Adjusted diluted earnings per share were $5.80 against $2.69 a year earlier. Management said E-Infrastructure revenue rose 192% and that CEC's margins strengthened both year over year and sequentially.
| Metric | Q2 FY2026 | Q1 FY2026 | Q2 FY2025 | YoY |
|---|---|---|---|---|
| Revenue | $1.2B | $826M | $614M | +90.1% |
| Gross margin | 24.2% | 23.5% | 23.3% | +90bps |
| EBITDA | $259M | $165M | $126M | +105.5% |
| EPS | $5.01 | $3.10 | $2.31 | +117.3% |
| Signed backlog | $4.3B | $3.8B | n/a | +116% |
| Book-to-burn (signed) | 1.4x | 2.1x | n/a | — |
we could see softer third quarter awards with higher levels in the fourth quarter and early 2027. This, coupled with our forecast for strong revenue burn in the third quarter could result in a sequential backlog decline in the third quarter. This would reflect award timing, not a change in demand.— Joe Cutillo, CEO, 2026-08-04
Management tone: Management's language escalated between the two calls in the evidence set, from "unprecedented demand" in Q1 2026 to "what we're seeing ahead is going to be far greater than we originally anticipated" in Q2 2026, and the geographic pull broadened from Texas and the Pacific Northwest to include the Midwest. They were direct about the capacity limit rather than deflecting it, named the sub-segment margins behind the blended E-Infrastructure number, and volunteered a likely weak-looking third-quarter backlog print before analysts asked. Management also criticized its own disclosure of future-phase work, saying it did not feel it was painting an adequate picture. Chief Operating Officer Daniel Govin spoke on the Q2 2026 call about capacity, fleet and prefabrication, a change from Q1.
Management Guidance
For FY2026 management guides revenue of $4.00B–$4.15B, diluted EPS of $17.25–$17.85, adjusted diluted EPS of $19.70–$20.30, EBITDA of $829M–$854M, adjusted EBITDA of $891M–$916M and CapEx of $130M–$140M. Within that, E-Infrastructure revenue growth is guided to over 100%, legacy site development to approaching 70%+, E-Infrastructure adjusted operating margin to the mid-20% range, Transportation revenue to a 7%–10% decline with adjusted operating margin up about 150–200 basis points, and Building Solutions revenue modestly down at high single to low double digit margins. Management says the midpoints imply 64% revenue growth, 84% adjusted EPS growth and 79% adjusted EBITDA growth versus prior year. It explains the shape of the year with strong third-quarter revenue burn, significant third-quarter revenue from the Northeast semiconductor project, and explicit conservatism on fourth-quarter weather.
Trajectory
Revenue has roughly doubled year over year for two straight quarters: $825.7M in Q1 2026, up 92%, and $1,168.2M in Q2 2026, up 90%, against $430.9M and $614.5M in the same quarters a year earlier. Gross margin rose to 24.2% in Q2 2026 from 23.3% a year earlier, and EBITDA margin to 22.2% from 20.5% on the same basis of operating income plus D&A as reported; the code-computed margin trend reads as broadly stable. The growth comes from one segment: E-Infrastructure revenue rose 192% in Q2 2026 while Transportation fell 20% and Building Solutions fell 1%, as resources were deliberately reallocated. The full-year revenue guide implies 64% growth at the midpoint against FY2025 revenue of about $2.49B, below the first-half rate, which management attributes to conservatism on fourth-quarter weather and to award timing.
The Model
The model projects FY+1 revenue of $4,200M and EBITDA of $903M, a 21.5% margin, and FY+2 revenue of $5,400M and EBITDA of $1,199M, a 22.2% margin. The near term rests on the order book and on how quickly Sterling can add electricians, site crews and equipment to burn it. FY+2 depends on multi-year campus work converting into booked phases, on the semiconductor and large-manufacturing end markets maturing beyond their first awards, and on acquisitions adding capacity rather than just site count.
| Metric | FY2025 | Next FY (E) | Following FY (E) |
|---|---|---|---|
| Revenue | $2.5B | $4.2B | $5.4B |
| YoY Growth | — | +68.7% | +28.6% |
| EBITDA | $491M | $903M | $1.2B |
| EBITDA Margin | 19.7% | 21.5% | 22.2% |
Projections are the median of 5 independent model runs. The model’s revenue sits 16.9% above analyst consensus.
For FY2026 management guides revenue of $4.00B–$4.15B, diluted EPS of $17.25–$17.85, adjusted diluted EPS of $19.70–$20.30, EBITDA of $829M–$854M, adjusted EBITDA of $891M–$916M and CapEx of $130M–$140M. Within that, E-Infrastructure revenue growth is guided to over 100%, legacy site development to approaching 70%+, E-Infrastructure adjusted operating margin to the mid-20% range, Transportation revenue to a 7%–10% decline with adjusted operating margin up about 150–200 basis points, and Building Solutions revenue modestly down at high single to low double digit margins. Management says the midpoints imply 64% revenue growth, 84% adjusted EPS growth and 79% adjusted EBITDA growth versus prior year. It explains the shape of the year with strong third-quarter revenue burn, significant third-quarter revenue from the Northeast semiconductor project, and explicit conservatism on fourth-quarter weather.
What Could Go Right — and Wrong
- CEC delivers the guided 300–500 basis points of margin improvement over 12–18 months, lifting the blended E-Infrastructure margin toward the mid-20% guidance.
- The pre-announced softer third quarter proves to be award timing, and stronger awards arrive in Q4 2026 and early 2027 as management expects.
- Capacity additions — more electricians through training and prefabrication, plus acquisitions for headcount — raise the ceiling on how fast revenue can grow.
- Semiconductor work expands beyond the first phase, or the pharma and next-generation semiconductor opportunities dated to roughly 2028 and 2030 arrive on schedule.
- Future-phase scope, which management says is not in any of its reported numbers, converts into disclosed backlog and makes the multi-year runway visible.
- Hyperscaler capital discipline or a pause in one campus program; E-Infrastructure demand rests on a small number of very large projects and its customer concentration is not disclosed.
- CEC keeps growing faster than higher-margin site development, so the blended E-Infrastructure margin drifts toward the electrical number even as every underlying business improves.
- The third-quarter backlog decline is not reversed in Q4 2026 or early 2027, turning what management calls award timing into a demand story.
- Transportation's guided 7%–10% revenue decline proves worse as the current federal funding cycle ends in September 2026, and Building Solutions keeps shrinking on residential headwinds.
- Acquisitions for what management calls pure capacity are unavailable or too expensive, leaving organic hiring as the only route to growth and capping it.
Looking Ahead
Over the next 12 months the questions are about conversion, not demand. Management has told investors to expect softer third-quarter 2026 awards and a possible sequential backlog decline, then stronger awards in the fourth quarter and early 2027, and it has guided to significant third-quarter revenue from the Northeast semiconductor project with a weather-related slowdown in the fourth quarter. CEC's margin bridge of 300–500 basis points over 12–18 months is the first place the mix-dilution argument gets tested, and the federal funding cycle that supports Transportation ends in September 2026.
- Q3 2026Q3 awards and backlog — Tests whether pre-announced softer awards are timing, not demand.
- Q3 2026Semiconductor project revenue — Significant Q3 revenue guided on the >$500M first phase.
- September 2026Federal funding cycle ends — Sets the question for Transportation's $969M signed backlog.
- Q4 2026Fourth-quarter weather — The swing factor behind management's conservative guidance.
- 2026 or early 2027Manufacturing awards — Several broader manufacturing opportunities management flagged.
- 12–18 monthsCEC margin bridge — 300–500 basis points of improvement guided; watch sequential progress.
Financials
Annual Summary
| Metric | FY2024 | FY2025 | TTM | YoY |
|---|---|---|---|---|
| Revenue | $2.1B | $2.5B | $3.4B | +17.7% |
| Gross Margin | 20.0% | 22.9% | 23.6% | +290bps |
| EBITDA | $333M | $491M | $714M | +47.2% |
| EBITDA Margin | 15.8% | 19.7% | 20.8% | +395bps |
| Net Income | $257M | $290M | $432M | +12.7% |
| Free Cash Flow | $416M | $361M | $481M | — |
| Net Cash | — | — | — | — |
Key Ratios (Trailing)
- P/E TTM—
- EV/EBITDA TTM—
- EV/Revenue TTM—
- Price/FCF TTM—
- Gross Margin (TTM)23.6%
- EBITDA Margin (TTM)20.8%
- Net Margin (TTM)12.5%
- ROIC39.9%
- FCF Conversion67.3%
- SBC / Revenue0.6%
The Company
Sterling Infrastructure is a U.S. infrastructure contractor that works through three reportable segments. E-Infrastructure Solutions performs advanced, large-scale site development — earthwork, underground utilities, duct banks, concrete, roads and paving — and mission-critical electrical services for data centers, semiconductor fabrication, manufacturing, distribution, warehousing and power generation. Transportation Solutions builds and rehabilitates highways, roads, bridges, airports, ports, rail and storm drainage systems. Building Solutions pours residential and commercial concrete foundations and provides plumbing services and surveys for new single-family builds. The AI buildout runs through the first segment: Sterling prepares the land and wires the campus, but does not build the data hall, the servers or the IT gear.
Sterling operates as a single contractor offering both site development and electrical work on the same campus, a combination management treats as its differentiator in winning large, time-sensitive projects. Its filed facilities include corporate headquarters in The Woodlands, Texas (leased); E-Infrastructure operations in Kennesaw, Georgia, an equipment yard in Austell, Georgia, Irving, Texas and an equipment yard in Flanders, New Jersey; Building Solutions in Denton, Texas (owned) and Wylie, Texas; a shared office in Draper, Utah serving all segments; and Transportation operations in Phoenix, Arizona and an owned equipment yard in Houston. Labor is the operational center: the company trains through Sterling Academy, CEC University and a four-year electrical apprenticeship, and it is tripling its modular prefabrication capacity so factory hours can substitute for certified field electrician hours.
Business Segments
Competitive Landscape
Sterling describes a market with plenty of small local bidders but no wave of new large entrants. Its own summary: "We have not seen an influx of major new players or anything along those lines, especially on these large jobs." Management frames the advantage as execution rather than price — "we make our money on execution" — and says the company does not generally look at small awards unless a customer insists. Once Sterling is on a site, the relationship tends to repeat: management says future phases are generally negotiated rather than rebid. The only competitor the evidence set documents is Everus Construction Group, which names Sterling in its own filings.
- Everus Construction Group (ECG)Everus's own filing states it faces competition from "large, publicly traded U.S. construction services companies, including … Sterling Infrastructure, Inc." Everus reported Q2 revenue of $1.23B (+34%), EBITDA of $128.6M (+53%) and total backlog of $4.55B (+53%), with data centers its largest backlog component, and it is acquiring Epsilon Industries, an off-site modular business.
- EMCOR (EME)Inferred competitor in the supply-chain mapping; not discussed by Sterling.
- Quanta Services (PWR)Inferred competitor in the supply-chain mapping; not discussed by Sterling.
- MasTec (MTZ)Inferred competitor in the supply-chain mapping; not discussed by Sterling.
- Comfort Systems (FIX)Inferred competitor in the supply-chain mapping; not discussed by Sterling.
Supply Chain
Sterling sits at the front of the AI data center build, preparing the land and installing the site and electrical systems before the building goes up. It relies on third-party suppliers for substantially all project materials, and the only customer it names in a management quote is Meta.
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