Sterling Infrastructure, Inc. ((STRL)) has held its Q2 earnings call. Read on for the main highlights of the call.

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Sterling Infrastructure’s latest earnings call painted a strongly upbeat picture, with explosive growth in revenue and earnings, record backlog, and a meaningful upgrade to full‑year guidance. Management balanced this optimism with candid discussion of mix-driven margin dilution, capacity constraints, and potential short-term lumpiness, but the tone remained confident about sustained multi-year growth in mission-critical infrastructure markets.

Explosive Revenue and EPS Momentum

Sterling reported a 90% jump in consolidated revenue for the second quarter of 2026, underscoring the scale of its current growth surge. Adjusted diluted EPS surged 116%, climbing from $2.69 to $5.80, highlighting not just top-line expansion but strong operational leverage and profitability gains across the portfolio.

EBITDA Surges with Margin Expansion

Adjusted EBITDA more than doubled in the quarter, reinforcing the strength of Sterling’s earnings power as volumes ramp. Consolidated margins improved by 150 basis points year over year to 22%, even as the company absorbed mix effects from lower-margin electrical work, signaling disciplined cost control and solid project execution.

Record Backlog and Multi-Year Visibility

Signed backlog ended the quarter at $4.3 billion, up 116% from a year earlier, while combined backlog reached $5.6 billion, up 150%. Management also cited more than $1.4 billion of high-probability future phases, taking the total accessible work pool above $7 billion and providing robust visibility into multi-year revenue.

E-Infrastructure Leads with Mission-Critical Work

E-Infrastructure was the star performer, with revenue up 192% and adjusted operating income up 148% in the quarter. Adjusted operating margins were around 24%, and more than 92% of the segment’s signed backlog is tied to mission-critical projects such as data centers, advanced manufacturing, and semiconductor facilities.

CEC Acquisition Accelerates Growth

The CEC electrical platform delivered 140% revenue growth, rapidly scaling its contribution to the group. Since year-end 2025, CEC has added roughly $1.7 billion to its combined backlog, which stood at about $2.4 billion in June, and management expects its margins to improve by 300–500 basis points over the next 12–18 months.

Bookings Outpace Burn, Supporting Momentum

Despite high revenue burn, Sterling’s second-quarter bookings drove further backlog expansion, underscoring demand strength. Excluding Stone Ridge, book-to-burn ratios were 1.4x for backlog and 1.3x for combined backlog, meaning new awards are coming in faster than the company is working them off.

Regional and Segment Strength Piles Up

Growth was especially pronounced in the Rocky Mountain division, where revenue climbed nearly 700% year on year, reflecting a wave of large projects. The company also highlighted an ahead-of-schedule semiconductor ramp in the Northeast and more than doubled organic site development revenue, accompanied by sequential margin expansion.

Balance Sheet Flexibility and Capital Deployment

Operating cash flow reached $328 million in the first half, leaving Sterling with $464 million in cash and $284 million of debt, or about $181 million in net cash. The company expanded its revolver to $1.5 billion, increased full-year guidance, and continued returning capital via share repurchases, providing ample flexibility for growth investments and disciplined capital allocation.

Investing in Capacity and Talent for Scale

Sterling raised its full-year capital spending plan to $130–$140 million, adding about $30 million to support fleet expansion and productivity initiatives. The company is also investing in recruiting, training programs such as Sterling Academy and CEC University, and prefabrication capabilities, which are expected to underpin future efficiency and margin gains.

Transportation Pulled Back to Favor Higher Margins

Transportation Solutions revenue fell 20% in the quarter as Sterling deliberately shifted resources toward higher-margin E-Infrastructure work. Management now expects full-year Transportation revenue to decline by roughly 7–10%, with combined backlog down 11% from year-end 2025 but margins projected to improve as the portfolio is pruned.

Building Segment Faces Residential Headwinds

Building Solutions revenue dipped 1% in the quarter, with adjusted operating margins at 9.9% as residential end markets remained challenged. The company anticipates these headwinds will persist through 2026, pointing to a modest full-year revenue decline but an effort to sustain high-single to low-double-digit margins.

Margin Mix Pressure from CEC Growth

The rapid growth of CEC’s electrical work, which currently carries lower margins than Sterling’s site development operations, diluted E-Infrastructure margins even as both businesses improved individually. CEC’s EBITDA margin is in the low double digits, compared with high-20s margins in site development, but management views this as a temporary mix issue as CEC scales and margins are targeted higher.

Capacity Constraints in Labor and Equipment

Management highlighted tight supply of electricians and growing constraints on equipment and execution capacity, given the surge in demand for complex infrastructure. To keep pace, Sterling expects to accelerate hiring and pursue tuck-in acquisitions, aiming to increase its ability to deliver on the strong backlog without compromising execution quality.

Award Timing Could Add Third-Quarter Lumpiness

The company cautioned that timing of large awards could make third-quarter results look softer, with a possible sequential backlog decline driven by award timing rather than demand weakness. Investors were reminded to expect some seasonality and lumpiness as mega-projects move through bidding and contract phases, even within a robust overall pipeline.

Regulatory and Supply Chain Watchpoints

Sterling flagged political and regulatory risks in certain markets, including emerging restrictions on data centers, along with potential upstream supply chain pressures. While these factors have not yet materially affected project schedules, management is monitoring them closely as the project mix becomes more dependent on large, complex, power-hungry infrastructure.

Upgraded Guidance Signals Confidence

Management raised full-year 2026 guidance to revenue of $4.00–$4.15 billion, with adjusted diluted EPS expected between $19.70 and $20.30 and adjusted EBITDA of $891–$916 million. At the midpoints, this implies roughly 64% revenue growth, 84% adjusted EPS growth, and 79% adjusted EBITDA growth over the prior year, with E-Infrastructure more than doubling, Transportation shrinking but expanding margins, and Building slightly down but still profitable.

Sterling’s earnings call portrayed a company in the midst of a powerful growth cycle, driven by mission-critical E-Infrastructure and an expanding electrical platform, backed by a record backlog and a cash-rich balance sheet. While mix, capacity, and regulatory challenges present real execution tests, management’s upgraded guidance and investments in people and equipment suggest Sterling is positioning itself to convert today’s opportunity wave into durable, long-term value creation for shareholders.