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Sankey diagram of Comfort Systems USA, Inc.. A complete text table follows the diagram.
Mechanical and electrical crews are becoming critical infrastructure for AI-era construction, pushing new-build work and backlog to record scale.
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All Sankey flows are reported GAAP amounts or transparent sums of reported customer categories. Backlog, activity mix and segment growth annotations are calculated directly from filing tables.
Labels and narrative explain the filing. A category marked “arithmetic bridge” or “residual” is calculated from reported totals, rather than a separately reported line.
| Category | Stage | Value | Notes |
|---|---|---|---|
| Technology infrastructure | 1 | $1.6B | Data centers and other technology facilities |
| Manufacturing | 1 | $536M | Industrial mechanical and electrical systems |
| Healthcare | 1 | $221M | Hospitals and care facilities |
| Government & education | 1 | $264M | Reported Government plus Education |
| Commercial & residential | 1 | $197M | Office, retail and multifamily work |
| Other customers | 1 | $31.5M | Reported other revenue |
| Mechanical & electrical revenue | 2 | $2.9B | 56.5% year-over-year growth |
| Labor, materials & subcontractors | 3 | $2.1B | Reported cost of services |
| Gross profit | 3 | $754M | 26.3% gross margin |
| Asset-sale gain | 3 | $0.3 | Reported operating gain |
| Gross profit plus asset gain | 4 | $755M | Reported operating resources |
| Manage & scale the contractor network | 5 | $269M | Selling, general & administrative |
| Operating income | 5 | $486M | 17.0% operating margin |
| Net other expense | 6 | $3.6M | Interest and earn-out remeasurement, net |
| Income before tax | 6 | $482M | 16.8% pretax margin |
| Income tax | 7 | $112M | Reported provision |
| Net income | 7 | $370M | 12.9% net margin |
| From | To | Value |
|---|---|---|
| Technology infrastructure | Mechanical & electrical revenue | $1.6B |
| Manufacturing | Mechanical & electrical revenue | $536M |
| Healthcare | Mechanical & electrical revenue | $221M |
| Government & education | Mechanical & electrical revenue | $264M |
| Commercial & residential | Mechanical & electrical revenue | $197M |
| Other customers | Mechanical & electrical revenue | $31.5M |
| Mechanical & electrical revenue | Labor, materials & subcontractors | $2.1B |
| Mechanical & electrical revenue | Gross profit | $754M |
| Gross profit | Gross profit plus asset gain | $754M |
| Asset-sale gain | Gross profit plus asset gain | $0.3 |
| Gross profit plus asset gain | Manage & scale the contractor network | $269M |
| Gross profit plus asset gain | Operating income | $486M |
| Operating income | Net other expense | $3.6M |
| Operating income | Income before tax | $482M |
| Income before tax | Income tax | $112M |
| Income before tax | Net income | $370M |