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Comfort Systems USA Inc. (NYSE:FIX) is one of the best engineering stocks to buy in 2026. On April 23, Comfort Systems USA achieved record-breaking financial results for Q1 2026, headlined by a surge in revenue to $2.87 billion, up from $1.83 billion in the prior year. Net income for the quarter rose to $370.4 million, or $10.51 per diluted share, more than doubling the $4.75 per share earned in Q1 2025.

This exceptional performance was supported by a massive shift in liquidity, with the company reporting $388.8 million in operating cash inflows compared to a significant cash outflow during the same period last year. The company’s growth was largely driven by a remarkable 51% increase in organic revenue, reflecting high demand for its mechanical and electrical services across the US. Backlog reached a record $12.45 billion as of March 31, nearly doubling the $6.89 billion reported a year ago.

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Looking forward, management expressed strong optimism regarding the next several quarters, citing underlying persistent demand and the dedication of its workforce. With over $375 million in quarterly cash flow and a robust same-store backlog increase, Comfort Systems USA Inc. (NYSE:FIX) appears well-positioned to capitalize on ongoing infrastructure and building systems demand throughout 2026.

Comfort Systems USA Inc. (NYSE:FIX) provides mechanical and electrical installation, renovation, maintenance, repair, and replacement services across the US.

While we acknowledge the potential of FIX as an investment, we believe certain AI stocks offer greater upside potential and carry less downside risk. If you're looking for an extremely undervalued AI stock that also stands to benefit significantly from Trump-era tariffs and the onshoring trend, see our free report on the best short-term AI stock.

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