FIX Hits New Highs on 121% Profit Growth; Valuation Remains Stretched

What happened

Comfort Systems USA (FIX) reported 121% Q1 profit growth, pushing shares into a cup-with-handle base, according to IBD. The company continues to benefit from data center cooling demand, with technology revenue accounting for 45.8% of Q3 2025 revenue and a record $9.38B backlog. However, the DeepValue report highlights that Q3’s 24.8% gross margin included a 4% catch-up tailwind and $15.5M in previously unrecognized revenue, blurring underlying profitability. At $1,371, FIX trades at 57.7x trailing P/E and 58.6x EV/EBITDA, pricing in sustained peak-cycle execution. The stock's crowded positioning as an AI/data-center proxy leaves it vulnerable to any slowdown in hyperscaler capex or backlog conversion.

Implication

The fundamental thesis remains intact if RPO converts at 65-75% and gross margins hold above 23% without one-time boosts. Wait for a pullback toward $1,100 or two clean quarters before adding.

Thesis delta

The news confirms strong recent performance but does not alter the wait rating. The key risk remains that the market is overpaying for cyclical tailwinds that may normalize.