Sterling Sets New Records in Q3 2025 with 32% Revenue Growth and Raises Full-Year Outlook
E-Infrastructure Drives Double-Digit Revenue and Earnings Expansion
Sterling Infrastructure (NASDAQ: STRL) delivered its strongest quarter yet in Q3 2025, with revenues hitting $689 million—a 32% increase from the prior year after adjusting for its RHB joint venture deconsolidation. Earnings outpaced even this top-line momentum, as diluted EPS surged 51% to $2.97 and adjusted EPS climbed 58% to $3.48, both all-time Q3 highs for the company.
This outperformance was powered primarily by the E-Infrastructure Solutions segment, which posted an eye-catching 58% year-over-year revenue gain. The acquisition of CEC added $41 million in Q3 revenue and significantly contributed to backlog strength, signaling Sterling's continued shift toward large, high-margin, mission-critical projects—especially in the data center and manufacturing spaces.
Operating Leverage Boosts Margins and Profitability
Strong revenue growth coupled with margin expansion drove exceptional bottom-line results. Sterling’s Q3 gross margin reached a record 24.7%, up from 21.9% in Q3 2024, as the company continues to move its business mix into higher-margin areas. Adjusted EBITDA reached $155.78 million, up 47% from last year’s comparable period.
| Key Q3 2025 Metrics | Q3 2025 | Q3 2024* | Change (%) |
|---|---|---|---|
| Revenue (ex-RHB, $M) | 689.0 | 521.6 | +32.1% |
| Gross Margin (%) | 24.7 | 21.9 | +2.8pts |
| Adj. Diluted EPS ($) | 3.48 | 2.20 | +58.2% |
| Adj. EBITDA ($M) | 155.78 | 106.23 | +46.6% |
| Signed Backlog ($B) | 2.58 | 1.57 | +64.3% |
*Q3 2024 figures shown exclude RHB JV per company reporting change.
Backlog Reaches Over $3 Billion, Highlighting Growth Visibility
Another milestone for Sterling was surpassing the $3 billion mark in combined backlog—a first in the company’s history. As of September 30, 2025, combined backlog (including unsigned awards) stood at $3.44 billion, up 44% year-over-year, with the recent CEC acquisition contributing over $800 million. Signed backlog alone grew to $2.58 billion, providing strong revenue visibility heading into 2026. Management highlighted robust new contract awards, with book-to-burn ratios (excluding CEC) at 1.23x for backlog and 1.76x for combined backlog.
Segment Analysis: E-Infrastructure Momentum Offsets Building Headwinds
Sterling’s Q3 growth wasn’t uniform across its business units, underscoring management’s ongoing strategy to focus on higher-value opportunities:
- E-Infrastructure Solutions: Revenues soared 58% (ex-RHB), accounting for 60% of total Q3 revenue. Adjusted operating margin in this segment also expanded to 26.8%.
- Transportation Solutions: Delivered 10% revenue growth, while adjusted operating income jumped 40%. Sterling continues to de-emphasize low-bid highway contracts in favor of projects with healthier margins, especially in the Rocky Mountain and Arizona markets.
- Building Solutions: Faced ongoing pressure from the soft U.S. housing market, with a 1% year-over-year revenue decline and a 10% drop in operating income.
| Segment | Q3 2025 Revenue ($M) | Q3 2025 % of Total | Q3 2025 Adj. Op. Margin (%) |
|---|---|---|---|
| E-Infrastructure | 417.1 | 60% | 26.8% |
| Transportation | 170.5 | 25% | 15.6% |
| Building | 101.4 | 15% | 12.4% |
Cash Flow Remains Robust, Enabling Share Buybacks and Investment
Sterling continues to generate strong cash flow from operations, posting $253.94 million for the first nine months of 2025 and ending Q3 with $306.40 million in cash and equivalents. The company also repurchased $4.7 million of shares at an average price of $274.37 per share, signaling ongoing commitment to shareholder returns while funding organic and M&A-driven growth initiatives.
Raised 2025 Guidance Signals Management Confidence
Looking ahead, Sterling’s leadership increased full-year 2025 guidance on the back of its strong year-to-date results and growing backlog. The updated midpoint targets imply:
- 27% adjusted revenue growth year-over-year (ex-RHB)
- 47% adjusted diluted EPS growth
- 42% adjusted EBITDA growth
| 2025 Full-Year Guidance | Low | High | 2024 Actual |
|---|---|---|---|
| Revenue ($B) | 2.38 | 2.39 | 2.12 |
| Net Income ($M) | 270 | 275 | 257.5 |
| Adj. Diluted EPS ($) | 10.35 | 10.52 | 7.09 |
| Adj. EBITDA ($M) | 486 | 491 | 343 |
With management signaling strong momentum across E-Infrastructure and transportation, while also executing on M&A, Sterling appears positioned for another record-setting year in 2025—even amid sector headwinds in residential construction.
Key Takeaway: Sterling Builds for Long-Term Strength
Behind the eye-catching headline numbers is a clear strategy: focus on mission-critical infrastructure, maximize high-margin opportunities, and balance investment with shareholder returns. With backlog now at record highs and earnings guidance climbing, Sterling’s long-term trajectory is increasingly supported by both near-term execution and strong forward visibility. As the U.S. ramps up investment in data centers, manufacturing, and infrastructure, Sterling’s Q3 results suggest it is firmly in the driver’s seat for future growth. Investors will want to track upcoming quarters to see how well the company capitalizes on its record backlog and integrates its recent acquisitions to sustain momentum into 2026 and beyond.
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