COMFORT SYSTEMS USA INC
Ticker: FIXIndustrialsConstructionS&P 500The business
Comfort Systems USA, Inc. (NYSE: CSU) operates as a leading provider of mechanical and electrical contracting services across North America. The company's website is www.comfortsystemsusa.com.
The company delivers comprehensive HVAC, plumbing, electrical, and building automation solutions to commercial, industrial, and residential customers. Comfort Systems operates through a decentralized network of regional service companies that maintain strong local market presence while benefiting from the parent company's operational expertise, financial resources, and purchasing power. This structure allows the company to combine entrepreneurial agility with enterprise-scale capabilities.
The business serves diverse end markets including healthcare facilities, educational institutions, data centers, manufacturing plants, hospitality venues, and commercial office buildings. Comfort Systems generates revenue through both service and maintenance contracts, which provide recurring revenue streams, as well as new construction and retrofit projects. The company's service-oriented model emphasizes long-term customer relationships and recurring business, creating revenue stability alongside project-based opportunities.
Comfort Systems maintains an extensive geographic footprint across the United States and Canada, with operations in numerous metropolitan markets. The company employs thousands of skilled technicians, engineers, and support personnel who deliver services across its service territories. The decentralized operating model enables rapid response to local market conditions while maintaining consistent quality standards and safety protocols.
The company has built competitive advantages through its technical expertise, established customer relationships, operational efficiency, and ability to execute complex projects. Comfort Systems' scale provides procurement advantages and access to capital for growth investments, while its regional structure preserves the entrepreneurial culture and local market knowledge that drive customer satisfaction and employee retention.
The credit agreement detailed in this filing represents the company's primary financing facility, providing liquidity for working capital, acquisitions, and general corporate purposes. The facility structure reflects Comfort Systems' established market position and access to institutional capital markets.
- Sector
- Industrials
- Industry
- Construction
- HQ
- HOUSTON, TX
- FY end
- 12-31
- CIK
- 1035983
- SIC
- 1731
Ownership
Who holds COMFORT SYSTEMS USA INC — across funds, superinvestors and bonds · N-PORT 2026Q2 · 13F 2026-06-30
Top fund holders
| Fund | % of fund | Value |
|---|---|---|
| VANGUARD TOTAL STOCK MARKET INDEX FUND VTI · VANGUARD INDEX FUNDS | 0.10% | $2.21B |
| VANGUARD 500 INDEX FUND VOO · VANGUARD INDEX FUNDS | 0.11% | $1.81B |
| VANGUARD MID-CAP INDEX FUND VO · VANGUARD INDEX FUNDS | 0.67% | $1.51B |
| iShares Core S&P 500 ETF IVV · iShares Trust | 0.11% | $956.97M |
| SMALLCAP World Fund Inc SMCWX | 0.93% | $883.31M |
Superinvestors in COMFORT SYSTEMS USA INC
Share of each manager's reported 13F portfolio.
Fund ownership counts N-PORT filers only, so it is a floor rather than a census — pensions, insurers and direct holders are not visible here, and the remainder is not “held by individuals”.
Fund ownership is a subset of institutional 13F ownership — the two describe overlapping populations and must not be added together.
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