Comfort Systems USA (FIX)
Market Price (7/10/2026): $1789.9 | Market Cap: $63.0 BilInvestor Relations Sector: Industrials | Industry: Construction & Engineering
Comfort Systems USA (FIX)
Market Price (7/10/2026): $1789.9Market Cap: $63.0 BilSector: IndustrialsIndustry: Construction & Engineering
Investment Highlights Why It Matters Detailed financial logic regarding cash flow yields vs trend-riding momentum.
Strong revenue growthRev Chg LTMRevenue Change % Last Twelve Months (LTM) is 38% Attractive cash flow generationCFO/Rev LTMCash Flow from Operations / Revenue (Sales), Last Twelve Months (LTM) is 16%, FCF/Rev LTMFree Cash Flow / Revenue (Sales), Last Twelve Months (LTM) is 14% Megatrend and thematic driversMegatrends include Smart Buildings & Proptech, Electrification of Everything, and Sustainable & Green Buildings. Themes include Building Management Systems, Show more. | Expensive valuation multiplesP/EBITPrice/EBIT or Price/(Operating Income) ratio is 40x, P/CFOPrice/(Cash Flow from Operations). CFO is cash before capital expenditures. is 38x Stock price has recently run up significantly12M Rtn12 month market price return is 234% Valuation getting more expensiveP/S 6M Chg %Price/Sales change over 6 months. Declining P/S indicates valuation has become less expensive. is 71% Key risksFIX key risks include [1] its concentrated exposure to large, Show more. |
| Strong revenue growthRev Chg LTMRevenue Change % Last Twelve Months (LTM) is 38% |
| Attractive cash flow generationCFO/Rev LTMCash Flow from Operations / Revenue (Sales), Last Twelve Months (LTM) is 16%, FCF/Rev LTMFree Cash Flow / Revenue (Sales), Last Twelve Months (LTM) is 14% |
| Megatrend and thematic driversMegatrends include Smart Buildings & Proptech, Electrification of Everything, and Sustainable & Green Buildings. Themes include Building Management Systems, Show more. |
| Expensive valuation multiplesP/EBITPrice/EBIT or Price/(Operating Income) ratio is 40x, P/CFOPrice/(Cash Flow from Operations). CFO is cash before capital expenditures. is 38x |
| Stock price has recently run up significantly12M Rtn12 month market price return is 234% |
| Valuation getting more expensiveP/S 6M Chg %Price/Sales change over 6 months. Declining P/S indicates valuation has become less expensive. is 71% |
| Key risksFIX key risks include [1] its concentrated exposure to large, Show more. |
Qualitative Assessment
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Comfort Systems USA (FIX) stock has gained about 30% since 3/31/2026 because of the following key factors:
1. Exceptional Q1 2026 Financial Performance. Comfort Systems USA (FIX) reported outstanding results for its first fiscal quarter ended March 31, 2026. The company posted diluted earnings per share (EPS) of $10.51, significantly beating analysts' consensus estimates of $6.81 by 54.4%. Quarterly revenue surged to $2.87 billion, representing a 56.5% increase year-over-year and exceeding analyst estimates of $2.39 billion by nearly 20%. Organic revenue growth alone was 51% compared to the prior year. This strong performance also led to a record gross margin of 26.3% and substantial operating cash inflows of $388.8 million.
2. Record Backlog Fueled by Data Center and AI Infrastructure Demand. The company's backlog reached an unprecedented $12.45 billion as of March 31, 2026, a substantial increase from $11.94 billion at the end of fiscal 2025 and nearly double the $6.89 billion from March 31, 2025. This record backlog provides significant revenue visibility and is largely driven by robust demand from technology sector customers, particularly in data center and AI infrastructure projects, which constituted 56% of Q1 2026 revenue.
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Comfort Systems USA (FIX) stock has gained about 30% since 3/31/2026 because of the following key factors:
1. Exceptional Q1 2026 Financial Performance. Comfort Systems USA (FIX) reported outstanding results for its first fiscal quarter ended March 31, 2026. The company posted diluted earnings per share (EPS) of $10.51, significantly beating analysts' consensus estimates of $6.81 by 54.4%. Quarterly revenue surged to $2.87 billion, representing a 56.5% increase year-over-year and exceeding analyst estimates of $2.39 billion by nearly 20%. Organic revenue growth alone was 51% compared to the prior year. This strong performance also led to a record gross margin of 26.3% and substantial operating cash inflows of $388.8 million.
2. Record Backlog Fueled by Data Center and AI Infrastructure Demand. The company's backlog reached an unprecedented $12.45 billion as of March 31, 2026, a substantial increase from $11.94 billion at the end of fiscal 2025 and nearly double the $6.89 billion from March 31, 2025. This record backlog provides significant revenue visibility and is largely driven by robust demand from technology sector customers, particularly in data center and AI infrastructure projects, which constituted 56% of Q1 2026 revenue.
3. Positive Analyst Sentiment and Upgraded Outlook. Following the strong Q1 2026 results, multiple Wall Street analysts upgraded their ratings and raised price targets for FIX. For instance, KeyBanc Capital Markets upgraded FIX to Overweight from Sector Weight on April 24, 2026, setting a $2,004 price target. UBS also raised its price target to $2,125 from $1,992 on June 8, 2026. Analysts generally maintain a "Strong Buy" or "Moderate Buy" consensus rating, with a mean price target of approximately $1,991.50 to $2,128.62, indicating further upside potential. Management's guidance for full-year 2026 same-store revenue growth in the mid-to-high 20% range and sustained strong gross profit margins also contributed to the optimistic outlook.
4. Strategic Expansion in Modular Construction and Acquisitions. Comfort Systems USA's strategic investments in modular construction capabilities continue to contribute to its growth. Modular business represented 17% of year-to-date 2026 revenue, with the company targeting 4 million square feet of modular capacity by the end of fiscal 2026 to enhance project timelines and address labor efficiencies. Additionally, the company announced a pending acquisition of an electrical contractor, expected to close in early May, which is projected to add approximately $250 million in annualized revenue at 8-10% EBITDA margins.
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Stock Movement Drivers
Fundamental Drivers
The 29.2% change in FIX stock from 3/31/2026 to 7/9/2026 was primarily driven by a 11.4% change in the company's Total Revenues ($ Mil).| (LTM values as of) | 3312026 | 7092026 | Change |
|---|---|---|---|
| Stock Price ($) | 1378.45 | 1781.42 | 29.2% |
| Change Contribution By: | |||
| Total Revenues ($ Mil) | 9,102 | 10,136 | 11.4% |
| Net Income Margin (%) | 11.2% | 12.1% | 7.5% |
| P/E Multiple | 47.5 | 51.3 | 7.8% |
| Shares Outstanding (Mil) | 35 | 35 | 0.1% |
| Cumulative Contribution | 29.2% |
Market Drivers
3/31/2026 to 7/9/2026| Return | Correlation | |
|---|---|---|
| FIX | 29.2% | |
| Market (SPY) | 15.6% | 64.1% |
| Sector (XLI) | 12.0% | 74.6% |
Fundamental Drivers
The 91.0% change in FIX stock from 12/31/2025 to 7/9/2026 was primarily driven by a 30.4% change in the company's P/E Multiple.| (LTM values as of) | 12312025 | 7092026 | Change |
|---|---|---|---|
| Stock Price ($) | 932.44 | 1781.42 | 91.0% |
| Change Contribution By: | |||
| Total Revenues ($ Mil) | 8,323 | 10,136 | 21.8% |
| Net Income Margin (%) | 10.1% | 12.1% | 20.0% |
| P/E Multiple | 39.3 | 51.3 | 30.4% |
| Shares Outstanding (Mil) | 35 | 35 | 0.3% |
| Cumulative Contribution | 91.0% |
Market Drivers
12/31/2025 to 7/9/2026| Return | Correlation | |
|---|---|---|
| FIX | 91.0% | |
| Market (SPY) | 10.5% | 60.1% |
| Sector (XLI) | 17.1% | 71.2% |
Fundamental Drivers
The 233.0% change in FIX stock from 6/30/2025 to 7/9/2026 was primarily driven by a 60.6% change in the company's P/E Multiple.| (LTM values as of) | 6302025 | 7092026 | Change |
|---|---|---|---|
| Stock Price ($) | 535.01 | 1781.42 | 233.0% |
| Change Contribution By: | |||
| Total Revenues ($ Mil) | 7,322 | 10,136 | 38.4% |
| Net Income Margin (%) | 8.1% | 12.1% | 48.5% |
| P/E Multiple | 31.9 | 51.3 | 60.6% |
| Shares Outstanding (Mil) | 36 | 35 | 0.9% |
| Cumulative Contribution | 233.0% |
Market Drivers
6/30/2025 to 7/9/2026| Return | Correlation | |
|---|---|---|
| FIX | 233.0% | |
| Market (SPY) | 22.7% | 55.2% |
| Sector (XLI) | 24.0% | 60.7% |
Fundamental Drivers
The 996.2% change in FIX stock from 6/30/2023 to 7/9/2026 was primarily driven by a 147.1% change in the company's Net Income Margin (%).| (LTM values as of) | 6302023 | 7092026 | Change |
|---|---|---|---|
| Stock Price ($) | 162.51 | 1781.42 | 996.2% |
| Change Contribution By: | |||
| Total Revenues ($ Mil) | 4,430 | 10,136 | 128.8% |
| Net Income Margin (%) | 4.9% | 12.1% | 147.1% |
| P/E Multiple | 26.9 | 51.3 | 90.6% |
| Shares Outstanding (Mil) | 36 | 35 | 1.7% |
| Cumulative Contribution | 996.2% |
Market Drivers
6/30/2023 to 7/9/2026| Return | Correlation | |
|---|---|---|
| FIX | 996.2% | |
| Market (SPY) | 75.6% | 56.4% |
| Sector (XLI) | 75.8% | 60.0% |
Price Returns Compared
| 2021 | 2022 | 2023 | 2024 | 2025 | 2026 | Total [1] | |
|---|---|---|---|---|---|---|---|
| Returns | |||||||
| FIX Return | 89% | 17% | 80% | 107% | 121% | 81% | 3179% |
| Peers Return | 52% | -2% | 46% | 49% | 47% | 52% | 622% |
| S&P 500 Return | 27% | -19% | 24% | 23% | 16% | 9% | 99% |
Monthly Win Rates [3] | |||||||
| FIX Win Rate | 75% | 42% | 83% | 75% | 75% | 57% | |
| Peers Win Rate | 65% | 43% | 63% | 62% | 58% | 69% | |
| S&P 500 Win Rate | 75% | 42% | 67% | 75% | 67% | 43% | |
Max Drawdowns [4] | |||||||
| FIX Max Drawdown | -20% | -24% | -19% | -16% | -46% | -19% | |
| Peers Max Drawdown | -18% | -32% | -29% | -23% | -35% | -19% | |
| S&P 500 Max Drawdown | -5% | -25% | -10% | -8% | -19% | -9% | |
[1] Cumulative total returns since the beginning of 2021
[2] Peers: EME, PWR, MTZ, APG, MYRG. See FIX Returns vs. Peers.
[3] Win Rate = % of calendar months in which monthly returns were positive
[4] Max drawdown represents maximum peak-to-trough decline within a year
[5] 2026 data is for the year up to 7/9/2026 (YTD)
How Low Can It Go
| Event | FIX | S&P 500 |
|---|---|---|
| 2025 US Tariff Shock | ||
| % Loss | -25.0% | -18.8% |
| % Gain to Breakeven | 33.3% | 23.1% |
| Time to Breakeven | 21 days | 79 days |
| 2022 Inflation Shock & Fed Tightening | ||
| % Loss | -23.0% | -24.5% |
| % Gain to Breakeven | 29.8% | 32.4% |
| Time to Breakeven | 41 days | 427 days |
| 2020 COVID-19 Crash | ||
| % Loss | -38.9% | -33.7% |
| % Gain to Breakeven | 63.6% | 50.9% |
| Time to Breakeven | 99 days | 140 days |
| Q4 2018 Fed Policy Error / Growth Scare | ||
| % Loss | -25.8% | -19.2% |
| % Gain to Breakeven | 34.9% | 23.8% |
| Time to Breakeven | 112 days | 105 days |
| 2015-2016 China Devaluation / Global Growth Scare | ||
| % Loss | -15.6% | -12.2% |
| % Gain to Breakeven | 18.5% | 13.9% |
| Time to Breakeven | 23 days | 62 days |
| 2014-2016 Oil Price Collapse | ||
| % Loss | -15.7% | -6.8% |
| % Gain to Breakeven | 18.7% | 7.3% |
| Time to Breakeven | 19 days | 15 days |
In The Past
Comfort Systems USA's stock fell -25.0% during the 2025 US Tariff Shock. Such a loss loss requires a 33.3% gain to breakeven.
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| Event | FIX | S&P 500 |
|---|---|---|
| 2025 US Tariff Shock | ||
| % Loss | -25.0% | -18.8% |
| % Gain to Breakeven | 33.3% | 23.1% |
| Time to Breakeven | 21 days | 79 days |
| 2022 Inflation Shock & Fed Tightening | ||
| % Loss | -23.0% | -24.5% |
| % Gain to Breakeven | 29.8% | 32.4% |
| Time to Breakeven | 41 days | 427 days |
| 2020 COVID-19 Crash | ||
| % Loss | -38.9% | -33.7% |
| % Gain to Breakeven | 63.6% | 50.9% |
| Time to Breakeven | 99 days | 140 days |
| Q4 2018 Fed Policy Error / Growth Scare | ||
| % Loss | -25.8% | -19.2% |
| % Gain to Breakeven | 34.9% | 23.8% |
| Time to Breakeven | 112 days | 105 days |
| 2011 US Debt Ceiling Crisis & European Contagion | ||
| % Loss | -25.9% | -17.9% |
| % Gain to Breakeven | 34.9% | 21.8% |
| Time to Breakeven | 24 days | 123 days |
| 2010 Eurozone Sovereign Debt Crisis / Flash Crash | ||
| % Loss | -30.3% | -15.4% |
| % Gain to Breakeven | 43.4% | 18.2% |
| Time to Breakeven | 268 days | 125 days |
| 2008-2009 Global Financial Crisis | ||
| % Loss | -48.9% | -53.4% |
| % Gain to Breakeven | 95.6% | 114.4% |
| Time to Breakeven | 399 days | 1085 days |
In The Past
Comfort Systems USA's stock fell -25.0% during the 2025 US Tariff Shock. Such a loss loss requires a 33.3% gain to breakeven.
Preserve Wealth
Limiting losses and compounding gains is essential to preserving wealth.
Asset Allocation
Actively managed asset allocation strategies protect wealth. Learn more.
About Comfort Systems USA (FIX)
Comfort Systems USA (FIX) is a prominent mechanical and electrical contractor operating throughout the United States. The company provides a full spectrum of services for building systems, covering everything from initial design, engineering, and integration to installation, ongoing maintenance, repair, renovation, and replacement. Essentially, they are responsible for ensuring the critical operational infrastructure within commercial, industrial, and institutional buildings operates reliably and efficiently.
The company's core services encompass the comprehensive design, engineering, and installation of complex Mechanical, Electrical, and Plumbing (MEP) systems. This includes specialized work on Heating, Ventilation, and Air Conditioning (HVAC) systems, plumbing, piping and controls, electrical infrastructure, monitoring solutions, and fire protection. Beyond new construction, Comfort Systems USA also offers essential renovation, expansion, and continuous maintenance programs, alongside specific off-site construction capabilities for existing structures.
Comfort Systems USA serves a wide array of clients across the commercial, industrial, and institutional markets. Their primary customer base includes building owners and developers, general contractors, architects, consulting engineers, and property managers. By addressing the specialized needs of these stakeholders, the company plays a vital role in the construction, modernization, and upkeep of the intricate mechanical and electrical systems that are fundamental to contemporary buildings and facilities.
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Here are 1-3 brief analogies to describe Comfort Systems USA (FIX):
- Like **Johnson Controls**, but focused on the direct installation, renovation, and ongoing service of a building's mechanical, electrical, and plumbing (MEP) systems.
- Similar to a **CBRE Group** or **JLL**, but they are the ones directly installing, repairing, and maintaining a building's critical internal systems like HVAC, electrical, and plumbing.
- A specialized **general contractor** for all of a commercial building's essential internal systems (HVAC, electrical, plumbing, and fire protection), handling everything from installation to long-term maintenance.
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- Mechanical Systems Services: Provides installation, renovation, maintenance, repair, and replacement for heating, ventilation, air conditioning (HVAC), plumbing, and piping systems.
- Electrical Systems Services: Offers design, installation, renovation, maintenance, repair, and replacement services for diverse electrical systems.
- MEP Systems Engineering & Integration: Delivers comprehensive design, engineering, integration, and start-up services for Mechanical, Electrical, and Plumbing (MEP) systems.
- Building Systems Monitoring & Controls: Includes monitoring, maintenance, and management services for existing building systems and their associated controls.
- Off-site Construction: Engages in specialized construction services using prefabrication and modular techniques for various building components.
- Fire Protection Services: Provides installation, maintenance, and repair services for essential fire protection systems.
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Brian E. Lane, Chief Executive Officer & Director
Mr. Lane has served as Chief Executive Officer since December 2011 and as a Director since November 2010. He joined Comfort Systems USA in October 2003. Prior to Comfort Systems, he spent fifteen years at Halliburton, a global service and equipment company, holding various positions in business development, strategy, and project initiatives, departing as the Regional Director of Europe and Africa. His additional experience includes serving as a Regional Director of Capstone Turbine Corporation and a Vice President of Kvaerner, an international engineering and construction company. Mr. Lane is a member of the Board of Directors of Main Street Capital Corporation.
William George, Executive Vice President & Chief Financial Officer
Mr. George was one of the small group of executives who helped found Comfort Systems USA in 1997. From the company's inception until 2005, he served as General Counsel. Before joining the Company, Mr. George was General Counsel of a large public consolidator of medical transportation, and prior to that, he was a corporate lawyer at the Boston law firm Ropes & Gray. Comfort Systems USA was initially funded by private equity to provide capital for growth and acquisitions.
Trent McKenna, President & Chief Operating Officer
Mr. McKenna has served as President and Chief Operating Officer for Comfort Systems USA since January 2026. Prior to this, he served as Chief Operating Officer from January 2022 to December 2025. Mr. McKenna has held various roles at the Company since 2004, including Senior Vice President, Vice President – Region 4, General Counsel, and Secretary. Before joining Comfort Systems USA in 2004, from February 1999 to August 2004, he was a practicing attorney in complex commercial litigation at Akin Gump Strauss Hauer & Feld LLP.
Julie Shaeff, Senior Vice President & Chief Accounting Officer
Ms. Shaeff has served as the Chief Accounting Officer since April 2005. Prior to her current position, she was the Assistant Controller from September 1999 until April 2005. Before joining Comfort Systems USA, Ms. Shaeff was a Financial Reporting Manager for Browning-Ferris Industries, Inc., a then publicly-held waste services company. From 1987 to 1996, she held various positions with Andersen LLP.
Rachel Eslicker, Senior Vice President & General Counsel
Ms. Eslicker has served as Senior Vice President and General Counsel for Comfort Systems USA since December 2025. Prior to this, she served as Associate General Counsel and Assistant Corporate Secretary from January 2023 to December 2025 and as Senior Corporate Counsel from January 2019 to December 2022. Ms. Eslicker started her career as an associate in the Mergers and Acquisitions and Capital Markets department of Vinson & Elkins LLP.
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Key Risks to Comfort Systems USA (FIX)
- Scarcity of Skilled Labor: Comfort Systems USA, Inc. acknowledges an increasing scarcity of skilled labor in the building and services trades. This shortage poses a significant risk as it could limit the company's ability to scale operations and meet the growing demand for its services, potentially impacting project timelines and overall profitability. This is a widespread challenge within the HVAC industry, making recruitment, training, and retention of talented individuals crucial for sustaining operations.
- Market Cyclicality and Economic Uncertainties: The company's business is susceptible to the impacts of slower periods of economic growth, which can affect the demand for new mechanical, electrical, and plumbing (MEP) products and services. Additionally, Comfort Systems USA is exposed to broader market risks, including fluctuations in interest rates and volatility in commodity prices. The industry also faces challenges from fluctuating demand, particularly due to seasonal variations, and increased competition. Project delays can also arise from various factors, including unforeseen site conditions or material procurement issues.
- Operational and Project Execution Risks: Given the nature of mechanical and electrical installation and maintenance services, Comfort Systems USA faces inherent operational and project execution risks. This includes the potential for project delays and execution challenges, especially concerning large and complex projects such as hyperscale data centers. Furthermore, the work involves significant safety hazards for employees, such as electrical shocks, falls from heights, and exposure to hazardous materials like refrigerants or asbestos. These safety risks can lead to bodily injury and potential liability for the company.
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Comfort Systems USA (FIX) operates within several addressable markets in the United States, providing mechanical and electrical installation, renovation, maintenance, repair, and replacement services. The key addressable markets for their main products and services are:
- Electrical Services: The U.S. electrical services market was valued at approximately $163.9 billion in 2024 and is projected to reach $294.6 billion by 2034. Another estimate for the U.S. electrical contractors market size was $237.59 billion in 2023, expected to grow to $256.65 billion by 2029.
- Plumbing Services: The U.S. plumbing services market is valued at approximately $134 billion. Another source indicates the U.S. plumbing market was estimated at $121.5 billion. The plumbers in the U.S. industry revenue was estimated at $191.4 billion in 2026.
- Fire Protection Services: The U.S. fire and life safety protection services market generated revenue of $32.5 billion in 2024. The U.S. fire protection system market size was estimated at $25.94 billion in 2024 and is projected to reach $32.26 billion by 2030.
- HVAC Services: The U.S. HVAC services market will generate an estimated revenue of $26.9 billion in 2024, projected to reach $32.9 billion by 2030. Another report valued the U.S. HVAC services market size at $17.93 billion in 2025, estimated to reach $18.98 billion in 2026 and $25.35 billion by 2031. The broader United States HVAC Market was valued at $31.26 billion in 2024.
- Mechanical, Electrical, and Plumbing (MEP) Services: The U.S. MEP services market is expected to generate a value of $34.90 billion in 2025. The United States MEP Services Market size is estimated at $51.81 billion in 2025 and is expected to reach $100.42 billion by 2030.
- Off-site Construction (Modular Construction): The U.S. modular construction market size was estimated at $10.53 billion in 2022 and is expected to grow to $19.17 billion by 2030.
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Comfort Systems USA (FIX) is expected to experience future revenue growth over the next 2-3 years, driven by several key factors:
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Strong Demand in the Technology Sector, Particularly Data Centers: Comfort Systems USA is significantly benefiting from the "AI Cooling Supercycle" and the escalating demand for high-density data center cooling and infrastructure. Technology-related work, primarily driven by data centers, constituted 45% of the company's revenue in the fourth quarter of 2025, a notable increase from 33% in the prior year, and is a major driver of its pipeline and backlog. Analysts and management consistently point to AI/data center construction as a primary growth catalyst for the company.
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Growth in Industrial and Manufacturing Sectors: Beyond data centers, the broader industrial and manufacturing markets are significant contributors to Comfort Systems USA's growth. Industrial customers accounted for 60% of total revenue in the first quarter of 2024. The company is well-positioned to capitalize on supportive government policies, such as the CHIPS Act and the Inflation Reduction Act, which are expected to fuel further expansion in these sectors.
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Strategic Acquisitions and Capacity Expansion: Acquisitions have played a crucial role in Comfort Systems USA's revenue growth. The company has benefited from recent substantial acquisitions, including Summit Industrial and J&S Mechanical, which are contributing to increased revenue and backlog. Furthermore, Comfort Systems USA is actively pursuing capacity expansion plans, including a projected modular capacity expansion to 4 million square feet, indicating a robust growth trajectory.
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Record-High Backlog and Strong Project Pipelines: Comfort Systems USA has reported an all-time high backlog, reaching $11.94 billion at year-end 2025, nearly doubling from the previous year. This substantial and growing backlog provides significant revenue visibility for 2026 and beyond, with much of the new work already scheduled for 2027 and 2028. Management expresses optimism for continued growth, citing persistent demand and strong project pipelines.
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Leveraging Modular Construction and Higher-Margin Services: The company's strategic use of modular construction is a key competitive advantage. This approach allows for faster, safer, and higher-quality project delivery by prebuilding complex components in a factory setting, which also helps address labor shortages in the construction industry. This, combined with a focus on higher-margin services and excellent operational execution, has led to expanding gross profit margins, further driving revenue and profitability.
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Share Repurchases
- Through May 16, 2025, Comfort Systems USA repurchased 10,757,964 shares at an aggregate price of approximately $437.6 million.
- In May 2025, the Board of Directors approved an amendment to the stock repurchase program, authorizing the company to acquire up to an additional 1,000,000 shares of its outstanding common stock.
- In 2025, the company repurchased 0.4 million shares for approximately $217.9 million, including over $200 million returned to shareholders via repurchases in Q4 2025.
Share Issuance
- No significant share issuances were identified over the last 3-5 years; instead, shares outstanding have shown a slight decline. For example, shares outstanding for the quarter ending December 31, 2025, were 0.035 billion, a 1.01% decline year-over-year.
Outbound Investments
- Comfort Systems USA has been active in acquisitions, completing several in recent years including Summit (January 2024), DECCO (October 2023, for $59.2 million), J & S Mechanical (February 2023), and Eldeco (February 2023).
- In the first quarter of 2025, the company acquired Century Contractors, a mechanical contractor expected to contribute approximately $90 million in annual revenues.
- During the third quarter of 2025, Comfort Systems USA completed acquisitions of FZ Electrical and Meisner Electric, anticipated to add roughly $200 million in annualized revenue.
Capital Expenditures
- Capital expenditures for the full year 2025 totaled $155 million.
- The company anticipates that capital expenditures will consistently remain within the range of 1-1.5% of its revenue.
- A primary focus of capital expenditures involves expanding the company's modular construction capacity, with plans to increase it from approximately 3 million square feet to 4 million square feet by the end of 2026, including new additions in Texas and North Carolina.
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Peer Comparisons
| Peers to compare with: |
Financials
| Median | |
|---|---|
| Name | |
| Mkt Price | 549.54 |
| Mkt Cap | 32.5 |
| Rev LTM | 12,708 |
| Op Inc LTM | 1,174 |
| FCF LTM | 879 |
| FCF 3Y Avg | 725 |
| CFO LTM | 988 |
| CFO 3Y Avg | 913 |
Growth & Margins
| Median | |
|---|---|
| Name | |
| Rev Chg LTM | 19.7% |
| Rev Chg 3Y Avg | 15.0% |
| Rev Chg Q | 23.2% |
| QoQ Delta Rev Chg LTM | 5.2% |
| Op Inc Chg LTM | 41.6% |
| Op Inc Chg 3Y Avg | 51.3% |
| Op Mgn LTM | 6.3% |
| Op Mgn 3Y Avg | 5.9% |
| QoQ Delta Op Mgn LTM | 0.2% |
| CFO/Rev LTM | 8.2% |
| CFO/Rev 3Y Avg | 8.2% |
| FCF/Rev LTM | 6.1% |
| FCF/Rev 3Y Avg | 6.7% |
Valuation
| Median | |
|---|---|
| Name | |
| Mkt Cap | 32.5 |
| P/S | 2.1 |
| P/Op Inc | 37.1 |
| P/EBIT | 36.3 |
| P/E | 53.3 |
| P/CFO | 33.5 |
| Total Yield | 1.9% |
| Dividend Yield | 0.0% |
| FCF Yield 3Y Avg | 3.8% |
| D/E | 0.0 |
| Net D/E | 0.0 |
Returns
| Median | |
|---|---|
| Name | |
| 1M Rtn | -3.1% |
| 3M Rtn | 10.4% |
| 6M Rtn | 68.7% |
| 12M Rtn | 101.1% |
| 3Y Rtn | 233.4% |
| 1M Excs Rtn | -4.4% |
| 3M Excs Rtn | 2.0% |
| 6M Excs Rtn | 49.0% |
| 12M Excs Rtn | 81.7% |
| 3Y Excs Rtn | 164.8% |
Comparison Analyses
Segment Financials
Revenue by Segment| $ Mil | 2025 | 2024 | 2023 | 2022 | 2021 |
|---|---|---|---|---|---|
| Mechanical Segment | 6,674 | 5,528 | 3,946 | 3,178 | 2,543 |
| Electrical Segment | 2,428 | 1,500 | 1,261 | 962 | 531 |
| Corporate | 0 | 0 | 0 | 0 | |
| Total | 9,102 | 7,027 | 5,207 | 4,140 | 3,074 |
| $ Mil | 2025 | 2024 | 2023 |
|---|---|---|---|
| Mechanical Segment | 999 | 617 | 357 |
| Electrical Segment | 387 | 193 | 111 |
| Corporate | -72 | -60 | -50 |
| Total | 1,315 | 749 | 418 |
| $ Mil | 2025 | 2024 | 2023 | 2022 | 2021 |
|---|---|---|---|---|---|
| Mechanical Segment | 3,684 | 3,163 | 2,180 | 1,741 | 1,453 |
| Electrical Segment | 1,766 | 985 | 901 | 790 | 690 |
| Corporate | 992 | 563 | 225 | 66 | 66 |
| Total | 6,441 | 4,711 | 3,306 | 2,597 | 2,209 |
Price Behavior
| Market Price | $1,781.42 | |
| Market Cap ($ Bil) | 62.7 | |
| First Trading Date | 06/27/1997 | |
| Distance from 52W High | -13.8% | |
| 50 Days | 200 Days | |
| DMA Price | $1,881.75 | $1,325.30 |
| DMA Trend | up | up |
| Distance from DMA | -5.3% | 34.4% |
| 3M | 1YR | |
| Volatility | 56.9% | 57.1% |
| Downside Capture | 363.51 | 244.79 |
| Upside Capture | 271.58 | 334.05 |
| Correlation (SPY) | 60.6% | 55.2% |
| 1M | 2M | 3M | 6M | 1Y | 3Y | |
|---|---|---|---|---|---|---|
| Beta | 2.82 | 2.55 | 2.54 | 2.40 | 2.45 | 1.88 |
| Up Beta | 2.19 | 2.12 | 2.57 | 2.38 | 2.09 | 1.73 |
| Down Beta | 2.85 | 1.92 | 2.33 | 1.94 | 1.97 | 1.60 |
| Up Capture | 422% | 328% | 345% | 569% | 1119% | 5078% |
| Bmk +ve Days | 11 | 24 | 40 | 67 | 140 | 429 |
| Stock +ve Days | 13 | 23 | 38 | 75 | 147 | 423 |
| Down Capture | 225% | 272% | 232% | 165% | 161% | 111% |
| Bmk -ve Days | 10 | 17 | 23 | 58 | 112 | 321 |
| Stock -ve Days | 8 | 18 | 25 | 50 | 105 | 328 |
[1] Upside and downside betas calculated using positive and negative benchmark daily returns respectively
Based On 1-Year Data
| Annualized Return | Annualized Volatility | Sharpe Ratio | Correlation with FIX | |
|---|---|---|---|---|
| FIX | 240.2% | 57.1% | 2.34 | - |
| Sector ETF (XLI) | 23.0% | 16.7% | 1.07 | 61.0% |
| Equity (SPY) | 22.3% | 12.5% | 1.33 | 55.2% |
| Gold (GLD) | 24.4% | 27.8% | 0.77 | 19.9% |
| Commodities (DBC) | 23.6% | 18.7% | 1.00 | -6.9% |
| Real Estate (VNQ) | 13.2% | 13.9% | 0.65 | 5.0% |
| Bitcoin (BTCUSD) | -42.8% | 42.8% | -1.18 | 22.9% |
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Based On 5-Year Data
| Annualized Return | Annualized Volatility | Sharpe Ratio | Correlation with FIX | |
|---|---|---|---|---|
| FIX | 87.5% | 45.3% | 1.53 | - |
| Sector ETF (XLI) | 13.7% | 17.6% | 0.61 | 61.1% |
| Equity (SPY) | 13.4% | 17.1% | 0.61 | 55.5% |
| Gold (GLD) | 18.0% | 18.3% | 0.80 | 11.2% |
| Commodities (DBC) | 7.5% | 19.5% | 0.28 | 9.9% |
| Real Estate (VNQ) | 2.9% | 18.9% | 0.06 | 31.6% |
| Bitcoin (BTCUSD) | 12.3% | 53.5% | 0.42 | 22.5% |
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Based On 10-Year Data
| Annualized Return | Annualized Volatility | Sharpe Ratio | Correlation with FIX | |
|---|---|---|---|---|
| FIX | 50.9% | 42.8% | 1.11 | - |
| Sector ETF (XLI) | 14.8% | 20.0% | 0.65 | 61.4% |
| Equity (SPY) | 15.8% | 17.9% | 0.75 | 55.8% |
| Gold (GLD) | 11.7% | 16.1% | 0.59 | 7.8% |
| Commodities (DBC) | 6.1% | 18.0% | 0.27 | 16.4% |
| Real Estate (VNQ) | 5.2% | 20.7% | 0.22 | 42.0% |
| Bitcoin (BTCUSD) | 58.0% | 66.2% | 0.98 | 16.4% |
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Returns Analyses
Earnings Returns History
Updated 6/3/2026| Forward Returns | |||
|---|---|---|---|
| Earnings Date | 1D Returns | 5D Returns | 21D Returns |
| 4/23/2026 | -2.7% | 3.7% | 3.1% |
| 2/19/2026 | 6.5% | 4.7% | -1.2% |
| 10/23/2025 | 19.0% | 16.8% | 8.4% |
| 7/24/2025 | 22.4% | 25.0% | 22.6% |
| 4/24/2025 | 5.6% | 11.1% | 25.5% |
| 2/20/2025 | -4.7% | -6.7% | -7.7% |
| 10/24/2024 | -10.4% | -5.4% | 18.9% |
| 7/25/2024 | 6.0% | 11.8% | 16.0% |
| ... | |||
| SUMMARY STATS | |||
| # Positive | 16 | 19 | 19 |
| # Negative | 8 | 5 | 5 |
| Median Positive | 7.8% | 11.8% | 15.0% |
| Median Negative | -2.9% | -5.4% | -1.2% |
| Max Positive | 22.4% | 25.0% | 29.9% |
| Max Negative | -12.9% | -13.9% | -7.7% |
| Forward Returns | |||
|---|---|---|---|
| Earnings Date | 1D Returns | 5D Returns | 21D Returns |
| 4/23/2026 | -2.7% | 3.7% | 3.1% |
| 2/19/2026 | 6.5% | 4.7% | -1.2% |
| 10/23/2025 | 19.0% | 16.8% | 8.4% |
| 7/24/2025 | 22.4% | 25.0% | 22.6% |
| 4/24/2025 | 5.6% | 11.1% | 25.5% |
| 2/20/2025 | -4.7% | -6.7% | -7.7% |
| 10/24/2024 | -10.4% | -5.4% | 18.9% |
| 7/25/2024 | 6.0% | 11.8% | 16.0% |
| 4/25/2024 | -3.0% | -1.2% | 10.0% |
| 2/22/2024 | 12.6% | 23.4% | 29.9% |
| 10/26/2023 | 14.5% | 22.2% | 29.5% |
| 7/26/2023 | -0.3% | 5.4% | 8.3% |
| 4/26/2023 | 12.1% | 12.7% | 13.2% |
| 2/22/2023 | 9.8% | 18.6% | 9.6% |
| 10/26/2022 | 8.0% | 6.4% | 15.0% |
| 7/27/2022 | 6.3% | 12.9% | 13.9% |
| 4/27/2022 | 1.1% | 6.2% | 4.1% |
| 2/23/2022 | -2.0% | 2.9% | 4.2% |
| 10/27/2021 | 7.6% | 15.1% | 18.8% |
| 7/28/2021 | 0.8% | -0.2% | -0.2% |
| 4/28/2021 | 1.0% | 4.3% | -0.6% |
| 2/25/2021 | -1.1% | 7.4% | 20.1% |
| 10/26/2020 | -12.9% | -13.9% | -3.1% |
| 7/27/2020 | 11.6% | 18.1% | 20.1% |
| SUMMARY STATS | |||
| # Positive | 16 | 19 | 19 |
| # Negative | 8 | 5 | 5 |
| Median Positive | 7.8% | 11.8% | 15.0% |
| Median Negative | -2.9% | -5.4% | -1.2% |
| Max Positive | 22.4% | 25.0% | 29.9% |
| Max Negative | -12.9% | -13.9% | -7.7% |
SEC Filings
Expand for More| Report Date | Filing Date | Filing |
|---|---|---|
| 03/31/2026 | 04/23/2026 | 10-Q |
| 12/31/2025 | 02/19/2026 | 10-K |
| 09/30/2025 | 10/23/2025 | 10-Q |
| 06/30/2025 | 07/24/2025 | 10-Q |
| 03/31/2025 | 04/24/2025 | 10-Q |
| 12/31/2024 | 02/20/2025 | 10-K |
| 09/30/2024 | 10/24/2024 | 10-Q |
| 06/30/2024 | 07/25/2024 | 10-Q |
| 03/31/2024 | 04/25/2024 | 10-Q |
| 12/31/2023 | 02/22/2024 | 10-K |
| 09/30/2023 | 10/26/2023 | 10-Q |
| 06/30/2023 | 07/26/2023 | 10-Q |
| 03/31/2023 | 04/26/2023 | 10-Q |
| 12/31/2022 | 02/22/2023 | 10-K |
| 09/30/2022 | 10/26/2022 | 10-Q |
| 06/30/2022 | 07/27/2022 | 10-Q |
| Report Date | Filing Date | Filing |
|---|---|---|
| 03/31/2026 | 04/23/2026 | 10-Q |
| 12/31/2025 | 02/19/2026 | 10-K |
| 09/30/2025 | 10/23/2025 | 10-Q |
| 06/30/2025 | 07/24/2025 | 10-Q |
| 03/31/2025 | 04/24/2025 | 10-Q |
| 12/31/2024 | 02/20/2025 | 10-K |
| 09/30/2024 | 10/24/2024 | 10-Q |
| 06/30/2024 | 07/25/2024 | 10-Q |
| 03/31/2024 | 04/25/2024 | 10-Q |
| 12/31/2023 | 02/22/2024 | 10-K |
| 09/30/2023 | 10/26/2023 | 10-Q |
| 06/30/2023 | 07/26/2023 | 10-Q |
| 03/31/2023 | 04/26/2023 | 10-Q |
| 12/31/2022 | 02/22/2023 | 10-K |
| 09/30/2022 | 10/26/2022 | 10-Q |
| 06/30/2022 | 07/27/2022 | 10-Q |
| 03/31/2022 | 04/27/2022 | 10-Q |
| 12/31/2021 | 02/23/2022 | 10-K |
| 09/30/2021 | 10/27/2021 | 10-Q |
| 06/30/2021 | 07/28/2021 | 10-Q |
| 03/31/2021 | 04/28/2021 | 10-Q |
| 12/31/2020 | 02/25/2021 | 10-K |
| 09/30/2020 | 10/26/2020 | 10-Q |
| 06/30/2020 | 07/27/2020 | 10-Q |
| 03/31/2020 | 04/27/2020 | 10-Q |
| 12/31/2019 | 02/26/2020 | 10-K |
| 09/30/2019 | 10/25/2019 | 10-Q |
| 06/30/2019 | 07/25/2019 | 10-Q |
Insider Activity
Updated 6/26/2026| # | Owner | Title | Holding | Action | Filing Date | Price | Shares | Transacted Value | Value of Held Shares | Form |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Myers, Franklin | Direct | Sell | 6262026 | 1954.47 | 6,700 | 13,094,949 | 121,401,904 | Form | |
| 2 | Hardy, Rhoman J | Direct | Sell | 5282026 | 1900.08 | 342 | 649,827 | 3,590,992 | Form | |
| 3 | Shaeff, Julie | CHIEF ACCOUNTING OFFICER | Direct | Sell | 5112026 | 2000.37 | 1,123 | 2,246,416 | 25,252,671 | Form |
| 4 | Myers, Franklin | Direct | Sell | 5082026 | 1902.57 | 4,500 | 8,561,574 | 131,245,124 | Form | |
| 5 | Lane, Brian E | CHIEF EXECUTIVE OFF. | Direct | Sell | 5062026 | 1969.84 | 11,113 | 21,890,810 | 317,319,234 | Form |
| # | Owner | Title | Holding | Action | Filing Date | Price | Shares | Transacted Value | Value of Held Shares | Form |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Myers, Franklin | Direct | Sell | 6262026 | 1954.47 | 6,700 | 13,094,949 | 121,401,904 | Form | |
| 2 | Hardy, Rhoman J | Direct | Sell | 5282026 | 1900.08 | 342 | 649,827 | 3,590,992 | Form | |
| 3 | Shaeff, Julie | CHIEF ACCOUNTING OFFICER | Direct | Sell | 5112026 | 2000.37 | 1,123 | 2,246,416 | 25,252,671 | Form |
| 4 | Myers, Franklin | Direct | Sell | 5082026 | 1902.57 | 4,500 | 8,561,574 | 131,245,124 | Form | |
| 5 | Lane, Brian E | CHIEF EXECUTIVE OFF. | Direct | Sell | 5062026 | 1969.84 | 11,113 | 21,890,810 | 317,319,234 | Form |
| 6 | Mercado,, Pablo G | Direct | Sell | 5012026 | 1779.78 | 500 | 889,890 | 5,339,340 | Form | |
| 7 | Sandbrook, William J | Direct | Sell | 4302026 | 1732.67 | 1,500 | 2,599,000 | 13,282,623 | Form | |
| 8 | Shaeff, Julie | CHIEF ACCOUNTING OFFICER | Direct | Sell | 3042026 | 1382.15 | 2,287 | 3,160,974 | 18,985,195 | Form |
| 9 | Myers, Franklin | Direct | Sell | 2272026 | 1472.56 | 8,636 | 12,717,032 | 108,962,114 | Form | |
| 10 | Lane, Brian E | PRESIDENT/CHIEF EXECUTIVE OFF. | Direct | Sell | 2262026 | 1453.12 | 9,365 | 13,608,439 | 249,242,953 | Form |
| 11 | Sandbrook, William J | Direct | Sell | 2262026 | 1443.32 | 2,500 | 3,608,294 | 13,229,450 | Form | |
| 12 | Skidmore, Constance Ellen | Direct | Sell | 2242026 | 1425.00 | 1,000 | 1,425,000 | 17,993,475 | Form | |
| 13 | Mercado,, Pablo G | Direct | Sell | 2242026 | 1405.00 | 500 | 702,500 | 4,917,500 | Form | |
| 14 | George, William Iii | CHIEF FINANCIAL OFFICER | Direct | Sell | 2232026 | 1434.97 | 9,000 | 12,914,748 | 54,276,381 | Form |
| 15 | Howell, Laura Finley | SVP & GENERAL COUNSEL | Direct | Sell | 12052025 | 996.16 | 1,000 | 996,163 | 7,907,545 | Form |
| 16 | George, William Iii | CHIEF FINANCIAL OFFICER | Direct | Sell | 12032025 | 958.88 | 4,370 | 4,190,299 | 38,186,377 | Form |
| 17 | Lane, Brian E | PRESIDENT/CHIEF EXECUTIVE OFF. | Direct | Sell | 11252025 | 947.98 | 7,158 | 6,785,645 | 171,478,315 | Form |
| 18 | Anderson, Darcy | Direct | Sell | 11032025 | 958.72 | 4,000 | 3,834,889 | 21,604,805 | Form | |
| 19 | Bulls, Herman E | Direct | Sell | 10312025 | 1013.62 | 2,000 | 2,027,247 | 30,990,528 | Form | |
| 20 | Myers, Franklin | Direct | Sell | 10312025 | 1006.68 | 5,000 | 5,033,410 | 83,454,953 | Form | |
| 21 | Mercado,, Pablo G | Direct | Sell | 10302025 | 1005.41 | 2,500 | 2,513,516 | 4,021,625 | Form | |
| 22 | Sandbrook, William J | Direct | Sell | 9102025 | 733.56 | 800 | 586,847 | 8,557,691 | Form | |
| 23 | Sandbrook, William J | Direct | Sell | 9102025 | 708.55 | 700 | 495,982 | 8,832,731 | Form | |
| 24 | Bulls, Herman E | Direct | Sell | 8282025 | 710.00 | 3,000 | 2,130,000 | 23,127,540 | Form | |
| 25 | Sandbrook, William J | Direct | Sell | 8272025 | 689.58 | 700 | 482,703 | 9,078,944 | Form | |
| 26 | Mercado,, Pablo G | Direct | Sell | 8252025 | 695.88 | 1,078 | 750,159 | 4,523,220 | Form | |
| 27 | Shaeff, Julie | CHIEF ACCOUNTING OFFICER | Direct | Sell | 8132025 | 704.50 | 1,369 | 964,460 | 11,288,204 | Form |
| 28 | George, William Iii | CHIEF FINANCIAL OFFICER | Direct | Sell | 8112025 | 692.60 | 8,436 | 5,842,785 | 32,879,866 | Form |
| 29 | Lane, Brian E | PRESIDENT/CHIEF EXECUTIVE OFF. | Direct | Sell | 8082025 | 691.74 | 10,000 | 6,917,439 | 130,079,673 | Form |
| 30 | Myers, Franklin | Direct | Sell | 8072025 | 683.57 | 4,500 | 3,076,045 | 68,627,252 | Form | |
| 31 | Trent, T McKenna | EVP & CHIEF OPERATING OFFICER | Direct | Sell | 7312025 | 716.63 | 4,400 | 3,153,160 | 15,507,096 | Form |
| 32 | Bulls, Herman E | Direct | Sell | 6112025 | 500.01 | 2,500 | 1,250,015 | 17,787,213 | Form | |
| 33 | Anderson, Darcy | Direct | Sell | 6092025 | 506.82 | 8,000 | 4,054,589 | 13,448,564 | Form |
FIX Trade Sentinel
MARKET WEIGHT (Score 5-6)
CONVICTION RATIONALE
The probability-adjusted skew of ~1.1x indicates a balanced risk-reward profile. While the fundamental momentum is strong (Regime B), the current high valuation already prices in significant success, leaving a limited margin of safety. The upside is capped by the already-premium multiple, while the downside from a cyclical turn is significant. The thesis is not compellingly asymmetric at the current price.
STOCK ARCHETYPE
Cyclical / CommodityThe business is project-based and tied to the capital expenditure cycles of its customers, particularly in construction. Its current hyper-growth is driven by a cyclical boom in data center buildouts, making cycle timing and valuation inversion critical analytical lenses.
INVESTMENT THESIS
Comfort Systems is capitalizing on the secular buildout of AI infrastructure, leading to a significant mix shift towards higher-margin electrical services for data centers. This has driven backlog to a record $9.38 billion, providing high revenue and earnings visibility for the next 12-18 months.
- Record Backlog of $9.38 billion, up 65% YoY (Q3 2025)
- Electrical Segment revenue growth of 71.4% YoY, outpacing the Mechanical segment (Q3 2025)
- Gross profit margin expansion to 24.8% from 21.1% YoY, driven by the favorable project mix shift.
PRIMARY RISK
The company's accelerating growth and premium valuation are highly dependent on the continued, unprecedented capital spending by a small number of hyperscale data center clients. Any signal of a 'digestion' phase, capex optimization, or project pause from these key customers would break the growth narrative and lead to a significant stock de-rating.
- Primary bear case identified as a slowdown in hyperscaler capex.
- Over-concentration risk in the cyclical data center market is a key structural vulnerability.
| KPI | Threshold | Rationale |
|---|---|---|
| Quarterly Backlog Growth (YoY) | > 40% YoY | This is the primary leading indicator. Any significant deceleration below the current 65% rate would signal that the growth peak is passing, which is the core bear thesis. |
| Electrical Segment Revenue Growth (YoY) | > 50% YoY | This segment is the engine of the high-margin growth story. A slowdown here would indicate a loss of momentum in the critical data center end-market. |
| Gross Margin Percentage | Stays above 24% | Measures the company's ability to maintain pricing power and execution efficiency on its massive backlog. Margin compression would signal execution issues or a loss of pricing power. |
Data Center Supercycle vs. Cyclical Peak
BULL VIEW
Record $9.38B backlog (+65% YoY) is tangible proof of a durable, multi-year growth runway fueled by the AI infrastructure buildout, supporting premium valuation.
CORE TENSION
Is the current data center boom a multi-year supercycle justifying FIX's valuation, or a temporary spike preceding a sharp cyclical downturn and multiple compression?
PREVAILING SENTIMENT
The company achieved a second consecutive same-store backlog increase of more than $1 billion in Q3 2025, demonstrating demand is massively outpacing revenue recognition.
BEAR VIEW
Extreme customer concentration in hyperscalers creates vulnerability. A capex 'digestion' phase could abruptly halt growth, causing the high P/E multiple to collapse.
| Timeline | Event & Metric To Watch |
|---|---|
Late February 2026 | Q4 2025 Earnings Call & FY26 Guidance Watch: Q4 Book-to-Bill Ratio and FY2026 same-store revenue growth guidance. The key is continued backlog growth despite record revenue burn. |
Late April 2026 | Hyperscaler (MSFT, AMZN, GOOG) Q1 Earnings Calls Watch: Commentary on FY2026 Capital Expenditures. Keywords like 'capital efficiency' or 'digesting capacity' are major red flags. |
Monthly | AIA Architecture Billings Index (ABI) Monthly Release Watch: The headline index number. A sustained failure to reclaim the 50.0 level signals a deepening slowdown in the broader non-residential construction market. |
| Date | Event | Stock Impact |
|---|---|---|
9/18/2025 | Positive Sector Read-Through Details: The stock rose significantly on a day with no company-specific news, likely due to positive guidance from a competitor or key data center customer. | Rose significantly by 4.8% $762.43 -> $798.88 |
10/24/2025 | Q3 2025 Earnings Beat & Raise Details: Announced a massive EPS beat and 35% revenue growth. Backlog surged 65% YoY to a record $9.38 billion, sending shares soaring. | Surged +19.0% $824.49 -> $981.05 |
11/24/2025 | CEO Insider Sale Details: CEO Brian Lane sold 7,158 shares for roughly $6.79 million. The stock surged despite the sale, indicating powerful underlying momentum and investor confidence. | Surged +5.7% $894.08 -> $945.07 |
12/1/2025 | CFO Insider Sale Details: CFO William George III sold 4,370 shares for approximately $4.19 million. The market reaction was muted, suggesting the sale was not viewed as a negative signal. | Slight -1.6% pullback $976.94 -> $961.20 |
12/17/2025 | Sharp Market Pullback Details: The stock experienced a significant one-day drop, likely due to sector-wide profit-taking in high-growth industrial names after a strong multi-month rally. | Plummeted -8.7% $968.50 -> $883.79 |
1/27/2026 | Stock Hits New All-Time High Details: Shares continued their strong rally from late 2025, reaching a new all-time high driven by sustained positive sentiment around the data center construction boom. | Rose significantly by 2.9% $1127.55 -> $1160.38 |
Position Sizing
4%-6%
NORMAL
Stock is in an Explosive Volatility regime (4.7x S&P). While the Bullish sentiment, widening moat, and high visibility are compelling, the expensive valuation requires discipline. We cap exposure at a Normal (4-6%) size to balance the strong fundamentals against the high volatility.
Diversification Alternatives
PWR
SECTORReduces single-sector risk. Instead of FIX's concentration in cyclical data center capex, PWR's growth is driven by the durable, multi-decade tailwind of U.S. grid modernization and electrification.
EME
INDUSTRYEME offers similar exposure to data center and industrial trends but is a larger, more diversified company, potentially offering a lower-risk profile for investors cautious of FIX's explosive growth.
Comfort Systems USA is re-rating from a cyclical construction contractor to a critical enabler of the AI and industrial manufacturing supercycle, driven by a near-doubling of its project backlog to $11.9B, with 45% of revenue now derived from the technology sector.
Filter all news through the lens of backlog growth and margin execution in high-tech construction (data centers, manufacturing).
Book-to-bill ratio >1.1x; sequential backlog growth >$1B; gross margins sustained above 24%; new modular capacity expansions announced or coming online; acquisitions of electrical contractors in high-growth regions.
Sequential decline in total backlog; book-to-bill ratio <1.0; gross margin compression below 23% due to labor/material costs on fixed-price contracts; slowdown in data center or semiconductor fab project awards.
Minor fluctuations in quarterly service revenue mix (expected to decline as a % of revenue as massive construction projects accelerate); individual project wins/losses unless they are multi-billion dollar programs; regional housing market data (less relevant to their industrial/commercial focus).
Repricing Catalyst
The primary catalyst is the execution of its record $11.94 billion backlog, which nearly doubled year-over-year. This backlog is heavily concentrated in high-growth technology and industrial sectors (67% of 2025 volume), particularly data centers. The market is re-rating the company based on the multi-year revenue visibility and higher margins associated with these complex projects.
Mechanical Systems Construction & Services
$6.8B TTM (75% of Total) · 23.6% MarginWhat It Is
Heating, Ventilation, and Air Conditioning (HVAC) systems, plumbing, piping, and building controls installation. Includes a rapidly growing off-site modular construction business for data centers.
Who Pays & How
General contractors and large facility owners (e.g., hyperscale data center operators, semiconductor manufacturers) pay for complex, mission-critical systems. They choose FIX for its national scale, engineering expertise, strong safety record, and ability to manage large, multi-year projects.
Competition
Electrical Systems Construction & Services
$2.3B TTM (25% of Total) · 26.7% MarginWhat It Is
Installation of power distribution, branch wiring, control systems, and instrumentation for industrial and commercial facilities.
Who Pays & How
The same customer base as the mechanical segment, often on the same projects. Customers require integrated mechanical and electrical (MEP) providers for complex facilities like data centers and manufacturing plants.
Competition
Industry Resources
| Industrials Resources |
| IndustryWeek |
| Manufacturing.net |
| Aviation Week |
| Construction & Engineering Resources |
| Engineering News-Record (ENR) |
| Construction Dive |
| Civil Engineering Magazine |
External Quote Links
| Y Finance | Barrons |
| TradingView | Morningstar |
| SeekingAlpha | ValueLine |
| Motley Fool | Robinhood |
| CNBC | Etrade |
| MarketWatch | Unusual Whales |
| YCharts | Perplexity Finance |
| FinViz |
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