Comfort Systems USA, an engineering and construction contractor, is quietly benefiting from explosive growth in AI data center construction, with nearly 60% of its business now tied to the technology sector.
The company's revenue jumped 50% year over year last quarter to $3.27 million, and its backlog grew from $12.45 billion to $14.06 billion in just three months.
The stock has surged over 140% in the past year and more than 2,000% over five years, yet most analysts still rate it a strong buy with an upside target of more than 27% from current levels.
What happened
Comfort Systems USA, an engineering and construction contractor specializing in plumbing, HVAC, and electrical work, reported last-quarter revenue of $3.27 million, up 50% year over year, with nearly 60% of business coming from the technology sector — primarily AI data center construction. The company's backlog grew from $12.45 billion at the end of March to $14.06 billion as of the end of June.
Why it matters
The stock has risen over 140% in the past year and more than 2,000% over the past five years as AI data center demand accelerated, making it a beneficiary of infrastructure buildout that most investors overlook. Most analysts covering the company rate it a strong buy, with a consensus price target of $2,217.63, more than 27% above the current price.
What to watch
Analysts project per-share earnings of $60.04 for next year (up roughly 23% from this year's expected $75.46) and $75.46 for 2028; shares currently trade at roughly 30 times next year's expected earnings.
Comfort Systems USA has emerged as a quiet winner in the artificial intelligence infrastructure boom, though it operates far from the spotlight of chipmakers and cloud giants. The company's core business—institutional engineering and construction contracting for plumbing, HVAC, and electrical systems—has become the enabling infrastructure for the data center explosion. The backlog growth from $12.45 billion to $14.06 billion in just three months signals strong future demand, with data centers explicitly identified as the chief driver of that pipeline.
The stock's performance reflects this structural tailwind: a 140% gain over one year and more than 2,000% over five years positions it as a significant beneficiary of AI infrastructure spending. Yet despite this ascent, the article notes the company remains relatively unknown among retail investors, suggesting the market opportunity may not be fully priced in across broader investor awareness. At roughly 30 times next year's expected earnings, the valuation is elevated but not extreme; analysts' consensus target of $2,217.63 implies 27% additional upside, indicating professional coverage has caught on even if the stock remains under-the-radar for many.
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