Customers prepaid Comfort Systems $3.2 billion as the stock fell 21%; results land October 22
Comfort Systems USA, the contractor that wires and cools AI data centers, reports third-quarter results on October 22 with its stock down 21 percent since July's record quarter. The backlog behind it is funded by customer prepayments, and Thursday tests whether the selloff was about demand or about pace.
Richard Tang · 3 min read
Wall Street voted before the numbers arrived. Comfort Systems USA+1.27% — Comfort Systems USA, up 1.27 percent today shares have fallen 21 percent since the company's record July report 1, and its third-quarter results land after the close on Thursday, October 22 2. The drop prices a slowdown. The filing that started it documents the opposite: a data-center buildout paid for by its customers, in advance.
The buildout is funded by customers, not by hope
AI models need compute, and the money is committed: Alphabet+0.87% — Alphabet, up 0.87 percent today lifted its 2026 capital-spending forecast to as much as $205 billion, with Amazon+2.71% — Amazon, up 2.71 percent today and Microsoft+0.51% — Microsoft, up 0.51 percent today close behind 3. None of it becomes capacity until buildings exist, and the wiring, piping and cooling run through contractors like Comfort Systems, a Houston mechanical and electrical firm with 211 locations 2. Its backlog hit a record $14.1 billion at midyear 4. A year earlier it was $8.1 billion 4.
The figure most coverage skips sits on the balance sheet: $3.2 billion of customer money paid ahead of the work, held in deferred revenue 4. Those prepayments drove just under $1 billion of free cash flow in a single quarter 4, which chief executive Brian Lane called unprecedented 4. The buildings are the part of the AI chain customers pay for up front, and the trades doing that work are earning their reward.
Customer prepayments have quadrupled since 2023, and the cash is showing up
- Deferred revenue
- Free cash flow
Data
| Deferred revenue | Free cash flow | |
|---|---|---|
| Q3 '23 | $0.78B | $0.19B |
| Q4 '23 | $0.91B | $0.15B |
| Q1 '24 | $1.13B | $0.12B |
| Q2 '24 | $1.15B | $0.17B |
| Q3 '24 | $1.2B | $0.28B |
| Q4 '24 | $1.15B | $0.17B |
| Q1 '25 | $1.27B | -$0.11B |
| Q2 '25 | $1.55B | $0.22B |
| Q3 '25 | $1.73B | $0.52B |
| Q4 '25 | $2.12B | $0.4B |
| Q1 '26 | $2.35B | $0.24B |
| Q2 '26 | $3.23B | $1B |
Quarterly revenue has more than doubled in three years of AI data-center work
Data
| Revenue | |
|---|---|
| Q3 '23 | $1.38B |
| Q4 '23 | $1.36B |
| Q1 '24 | $1.54B |
| Q2 '24 | $1.81B |
| Q3 '24 | $1.81B |
| Q4 '24 | $1.87B |
| Q1 '25 | $1.83B |
| Q2 '25 | $2.17B |
| Q3 '25 | $2.45B |
| Q4 '25 | $2.65B |
| Q1 '26 | $2.87B |
| Q2 '26 | $3.27B |
The bottleneck has moved from capital to permission
Demand is funded. Permission is the binding link now. Projects worth nearly $68 billion were blocked or delayed between April and June, more than half of the new large data centers tracked that quarter 5. More than 840 local opposition groups are active 5, and Oregon's governor has told regulators to withhold air and water permits from new and expanding data centers until July 2027 6. The skeptics' best argument is about siting, not about hyperscalers losing the will to spend. Comfort Systems is answering the way a builder would: about five million square feet of modular, offsite capacity targeted for late summer 2027 1.
Thursday tests margins and the backlog, not belief
Consensus expects another record quarter, with earnings per share roughly flat with the second quarter's $12.53 1. The verdict is underneath: whether gross margin holds near 26 percent, where better pricing on technology work has carried it 7, and whether the backlog climbs again. Management frames high-20s same-store growth as the 2027 starting point 1; a guide below that hands the skeptics their first hard evidence. Margins that hold and a book that grows would say the selloff repriced a deceleration management already flagged, not demand. The chain from model capability to standing buildings is being paid for in advance, and that evidence prices on Thursday.
Deepdive
AI-generated from this story and its cited sources. Not investment advice.
