Comfort Systems Q2 Revenue Tops $3B, EPS Surges 92% — But Valuation Keeps Us on Sidelines

What happened

Comfort Systems USA reported second-quarter 2026 revenue above $3 billion for the first time, driven by robust demand from technology and industrial customers that produced record backlog and sharply higher profitability. CEO Brian Lane highlighted quarterly revenue of $3.3 billion and EPS of $12.53, a 92% year-over-year increase, as evidence of the company's execution in a favorable end-market environment. Despite the impressive operational performance, the stock already trades at a P/E of 57.7x and EV/EBITDA of 58.6x, pricing in sustained peak-cycle fundamentals. The key underwriting variables remain unchanged: whether the $9.38B backlog converts at the guided 65%-75% pace and whether gross margins stay elevated without the benefit of cumulative catch-up accounting adjustments. Until we see evidence of margin quality independent of one-time tailwinds or a more attractive entry point, the risk-reward remains skewed to the downside.

Implication

The Q2 print confirms that Comfort Systems continues to benefit from hyperscaler data center demand and pricing power, but the stock's valuation — at 57.7x trailing P/E — leaves no room for disappointment. Investors should note that the 92% EPS surge includes contributions from cumulative catch-up accounting adjustments and a one-time customer bankruptcy recovery, which are not sustainable. The core thesis hinges on $9.38B of remaining performance obligations converting at a 65%-75% rate over the next 12 months; any sign of slowdown or cancellation would trigger multiple compression. Given the crowded AI/data-center proxy narrative, the stock is vulnerable to mean-reversion if tech capex sentiment shifts. Our WAIT rating stands, with an attractive entry near $1,100 and a trim level above $1,500.

Thesis delta

The Q2 results reaffirm the bull case's operational trajectory but do not resolve the valuation or margin-quality concerns that underpin our neutral stance. No shift in thesis: we continue to require either a 20%+ pullback or two clean quarters of margin sustainability without catch-up benefits before becoming constructive.