Why Data Center Stocks Like Comfort Systems USA Are Building Wealth in 2026

The AI infrastructure boom has captured investor attention, but the real opportunity lies not with the hyperscalers making headlines, but with the companies actually constructing the physical backbone of this digital revolution. Comfort Systems USA (NYSE: FIX), a largely under-the-radar construction and mechanical services provider, exemplifies this trend perfectly. Over the past couple of years, investors who recognized this shift have watched the stock climb an impressive 495%.

While everyone focuses on Alphabet and Amazon’s massive capital spending announcements, few realize that someone needs to build, install, and maintain the actual infrastructure. That’s where data center stocks focused on specialized services come into play.

The Unsexy Power of Mechanical Services in AI Data Centers

Before robots can handle these jobs, companies like Comfort Systems USA will remain indispensable. The firm specializes in delivering mechanical and electrical systems that make data centers function: HVAC systems, plumbing, piping, and electrical installations. Roughly three-quarters of its revenue comes from mechanical work, with electrical services making up the remainder.

The shift toward data center-focused operations is unmistakable. During recent earnings presentations, management disclosed that technology and industrial work accounted for 67% of 2025 volume, with data center projects alone reaching 45% of total revenue—up substantially from 33% the previous year. This concentration on data center stocks and related infrastructure is proving highly profitable.

Meanwhile, overall U.S. manufacturing construction spending, while declining from the pandemic-era peaks driven by the CHIPS Act and supply chain investments, remains at healthy levels. Comfort Systems’ pivot toward the still-booming AI data center segment is clearly resonating with investors and customers alike.

Explosive Growth in Backlog: Not Yet Reflecting Future Commitments

One of the most striking metrics is the company’s surging backlog—a number that tells an important story often missed by casual observers. However, here’s the nuance that separates sophisticated investors from the crowd: this expanding pipeline doesn’t yet capture the full scope of hyperscaler commitments.

During earnings discussions, company leadership revealed a critical timing insight. CFO William George explained that mechanical and electrical work represents a late-cycle investment in data center construction. The company isn’t booking backlog for commitments made today; rather, it’s executing on projects that originated one to two and a half years ago. Translation: the colossal spending commitments announced by major hyperscalers in 2026 are not yet fully embedded in Comfort Systems’ current backlog.

This dynamic presents a compelling implication for investors tracking data center stocks. The visible growth pipeline actually understates the company’s future revenue potential.

The Valuation Question and Long-Term Data Center Opportunity

Wall Street analysts project impressive numbers. Consensus expects earnings per share to expand 69% from $28.88 in 2025 to $48.92 by 2028. At current valuations, this implies roughly 30 times estimated 2028 earnings—a multiple that some investors might find stretched.

Yet for those convinced that AI infrastructure spending will dominate capital allocation over the coming decade, the fundamental story remains compelling. Revenue, earnings, and cash flow all appear positioned for substantial growth in the years ahead. Data center stocks benefiting from this secular trend could deliver outsized returns for patient investors.

The investment calculus depends on your conviction level. History offers instructive examples: Netflix investors who bought on December 17, 2004 saw $1,000 grow to $456,188. Nvidia backers from April 15, 2005 watched $1,000 become $1,133,413. The Motley Fool’s stock selection process has generated average returns of 916% versus 194% for the S&P 500.

Whether Comfort Systems USA joins these wealth-creation stories depends on the durability of AI data center spending and the company’s execution. For investors seeking exposure to data center stocks beyond traditional tech giants, understanding both the opportunity and the valuation context remains essential.