Sterling vs. Primoris: Which Infrastructure Stock is the Better Buy?

Core Insights - The article discusses the growing demand for infrastructure solutions in the U.S., particularly for mission-critical projects, and compares two companies, Sterling Infrastructure, Inc. (STRL) and Primoris Services Corporation (PRIM), in this context [2][4]. Company Analysis: Sterling Infrastructure, Inc. (STRL) - Sterling is diversifying its revenue by focusing on public infrastructure, especially mission-critical data centers and manufacturing [3]. - As of June 30, 2025, Sterling's E-Infrastructure Solutions backlog increased by 44% year-over-year to $1.2 billion, with revenues in this segment growing by 24.2% to $528.7 million, contributing 51% to total revenues [6]. - The total backlog for Sterling reached $2.01 billion, with a backlog margin of 17.8%, up from $1.69 billion at the end of 2024 [6]. - Sterling's acquisition of CEC Facilities Group, expected to close by Q3 2025, is anticipated to enhance its capabilities in mission-critical services [7][8]. - The company is strategically shifting towards large mission-critical projects due to weaknesses in the housing market, focusing on disciplined bidding and efficient execution [5]. Company Analysis: Primoris Services Corporation (PRIM) - Primoris specializes in constructing utility-scale power generation resources and is expanding its market exposure in data center infrastructure [9]. - As of June 30, 2025, Primoris' total backlog increased by 10% year-over-year to $11.49 billion, with $1.7 billion in data center work under evaluation for 2025 contracts [10][11]. - Primoris plans to submit bids for over $2.5 billion in natural gas generation projects and has solar projects worth $20-$30 billion planned through 2028 [11]. - Currently, only 10% of Primoris' revenues are tied to data center projects, indicating potential for revenue diversification [12]. Stock Performance & Valuation - In the past three months, Primoris' share price performance has outperformed Sterling's within the broader construction sector [13]. - Over the last five years, Sterling has traded at a premium valuation compared to Primoris on a forward 12-month price-to-earnings (P/E) ratio basis [14]. - Primoris offers a more attractive valuation with steady multi-year growth prospects, while Sterling shows slower growth with a premium valuation [15]. Earnings Estimates - The Zacks Consensus Estimate for STRL's 2025 EPS indicates a year-over-year growth of 45.9%, with a 9.4% increase projected for 2026 [18]. - For PRIM, the 2025 and 2026 earnings estimates imply year-over-year improvements of 20.7% and 12.1%, respectively [20]. Investment Consideration - Sterling's focus on mission-critical projects and strong backlog growth supports long-term visibility, but its premium valuation suggests optimism is already priced in [21]. - Primoris, with a larger backlog and aggressive expansion into high-growth markets, presents a more compelling buy opportunity due to its discounted valuation and stronger relative share performance [22].