Sterling vs. Comfort Systems: Which Stock Wins on Data Center Growth?

Sterling Infrastructure (STRL) and Comfort Systems USA (FIX) are capitalizing on the booming demand for AI-driven data center infrastructure, both reporting robust Q1 2025 results and significant backlogs. STRL's E-Infrastructure revenue rose 18% with operating income up 61%, further bolstered by its acquisition of CEC Facilities Group, while FIX recorded a 75% EPS surge and 19% revenue growth, with technology projects now comprising 37% of its revenue. Despite shared industry risks like tariff-related cost pressures and hyperscaler capital expenditure volatility, the analysis concludes Comfort Systems presents a stronger near-term investment due to its record backlog and operational momentum, though Sterling offers solid long-term growth.

Analysis

Both Sterling Infrastructure (STRL) and Comfort Systems USA (FIX) are capitalizing on the secular growth in AI-driven data center construction, yet they present distinct investment profiles. Sterling's E-Infrastructure Solutions segment is demonstrating strong profitability, with Q1 2025 revenue rising 18% year-over-year, adjusted operating income surging 61%, and margins expanding to 23%. This is supported by a $2.1 billion total backlog, where higher-margin E-Infrastructure projects account for 57%, and the recent strategic acquisition of CEC Facilities Group to bolster its service capabilities. In contrast, Comfort Systems is exhibiting superior earnings momentum, reporting a 75% year-over-year increase in Q1 EPS and a 19% rise in revenue. FIX holds a significantly larger record backlog of $6.9 billion and has benefited from upward revisions to its 2025 EPS estimates, unlike STRL whose estimates have been static. While STRL's stock has outperformed year-to-date (+29.4% vs. FIX's +17.9%) and it trades at a more attractive forward P/E multiple, FIX's operational metrics and analyst sentiment appear stronger for the near term. Both companies face external risks from potential volatility in hyperscaler capital expenditures and tariff-related cost pressures.

Key Decisions for Investors

• Comfort Systems (FIX) presents a compelling case for investors prioritizing near-term momentum, given its record $6.9 billion backlog, powerful 75% Q1 EPS growth, and positive earnings estimate revisions.
• Sterling Infrastructure (STRL) may be more suitable for value-oriented investors with a longer-term horizon, offering a lower forward P/E valuation and a clear growth strategy through its E-Infrastructure platform and the recent CEC acquisition.
• Investors should closely monitor hyperscaler capital expenditure announcements and macroeconomic indicators impacting construction costs, as these factors represent key risks to the project pipelines and margin profiles of both companies.