What smart money is saying about Comfort Systems USA
4 funds in our archive have pitched Comfort Systems USA — most recently Aristotle Large Cap Growth in December 2025.
Comfort Systems USA, Inc., together with its subsidiaries, provides mechanical and electrical installation, renovation, maintenance, repair, and replacement services for the mechanical and electrical services industry in the United States. It operates through two segments: Mechanical and Electrical. The company offers heating, ventilation, and air conditioning systems, as well as plumbing, electrical, piping and controls, off-site construction, monitoring, and fire protection. It also involved in the design, engineering, integration, installation, and start-up of mechanical, electrical, and plumbing (MEP) and related systems in new buildings; and renovation, expansion, maintenance, monitoring, repair, and replacement of MEP systems in existing buildings. In addition, the company provides remote monitoring of power usage, temperature, pressure, humidity and air flow for MEP and other building systems. It serves building owners and developers, general contractors, architects, consulting engineers, and property managers in the commercial, industrial, and institutional MEP markets. Comfort Systems USA, Inc. was founded in 1917 and is headquartered in Houston, Texas.
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Position history
Between Q1 2025 and Q2 2026, 7 fund letters reported a position in Comfort Systems USA — 1 opened or added to the position, 2 trimmed or exited.
| Quarter | Letters | Bought | Sold | Theses |
|---|---|---|---|---|
| Q2 2026 | 5 | 1 | 2 | 0 |
| Q1 2026 | 2 | 0 | 0 | 0 |
| Q4 2025 | 0 | 0 | 0 | 1 |
| Q2 2025 | 0 | 0 | 0 | 2 |
| Q1 2025 | 0 | 0 | 0 | 1 |
Fund activity · 7 positions · 3 moves
- June 2026
“In industrials, Comfort Systems benefited from demand for complex mechanical, electrical and modular construction capabilities tied to data center and manufacturing buildouts. We profitably exited the name during the quarter.”
Comfort Systems USA - June 2026
“Among our top contributors in Q2 were Twist Bioscience, Lattice Semiconductor and Comfort Systems. Twist Bioscience is a life sciences company that leverages a proprietary silicon-based DNA writing platform, with synthetic biology applications across drug discovery, diagnostics, agriculture and industrial materials. Recent results exceeded expectations, driven by strength in its DNA synthesis and protein solutions segment, as well as improving growth in next- generation sequencing. The company continues to benefit from growing demand from large pharmaceutical and AI customers for DNA synthesis and data generation, which may support incremental growth as computational approaches to drug discovery gain broader adoption. We trimmed the position during the quarter due to the stock’s recent strong performance. Lattice is a fabless leader in low-power field-programmable gate arrays. The company reported strong quarterly results, with revenue and guidance exceeding expectations as demand accelerated across servers, communications and industrial applications. The company also announced plans to acquire AMI, a complementary firmware and infrastructure management platform expected to expand Lattice’s data center capabilities and broaden its addressable market. We added to the position during the quarter. Comfort Systems is a provider of heating, ventilation and air conditioning services. Strong demand from data center construction, driven by hyperscaler customers, now accounts for a majority of its revenue. Recent earnings results exceeded expectations, with year-over-year same-store revenue growth of 51% and margin expansion. It also raised full-year guidance. We view the company as well positioned to benefit from ongoing investment in data center infrastructure and added to the position during the quarter.”
Comfort Systems USA - HoldsAve Maria FundsJune 2026
“Comfort Systems USA, Inc. provides mechanical and electrical contracting services.”
Comfort Systems USA - June 2026
“Comfort Systems USA, Inc. 2.00”
Comfort Systems USA - June 2026
“As noted above, Direct AI beneficiaries and a few other stocks in the portfolio rose sharply and in a number of instances prices raced ahead of fundamentals compressing future expected returns. We exited several positions including Credo Technology (CRDO), Semtech (SMTC), Nova Limited (NVMI), Universal Technical Institute (UTI) and Comfort Systems (FIX), entirely, and trimmed others, such as Modine (MOD), Forgent Power Solutions (FPS), Onto Innovation (ONTO), TTM Technologies (TTMI), and Carpenter Technology Corp (CRS).”
116 more words on why — unlock Granahan Investment Management Focused Growth Strategy’s full commentComfort Systems USA - March 2026
“OUTLOOK BUFFALO MID CAP DISCOVERY FUND March 31, 2026 TOP CONTRIBUTORS (CONITINUED) Comfort Systems USA (FIX) was another top contributor with shares rising 48%.”
Comfort Systems USA - March 2026
“ Comfort Systems (FIX) rose after reporting a material earnings beat in February, supported by strong backlog growth and continued margin expansion.”
Comfort Systems USA
Also mentioned · 1
These funds discuss Comfort Systems USA — as a competitor, benchmark or comparable — without disclosing a position in it.
- MentionedJAG Capital Management Small Mid Cap Growth StrategyJune 2026
“The strategy’s top contributors included several AI-related holdings, including Bloom Energy (BE), Jabil (JBL), Lattice Semiconductor (LSCC), and Comfort Systems (FIX).”
Comfort Systems USA
Fund coverage · 4 theses
- Aristotle Large Cap GrowthDecember 2025
Comfort Systems USA is a leading mechanical and electrical contractor with recurring revenues and CHIPS/IRA-driven exposure that justify a premium valuation.
Read the full thesis Comfort Systems is a leading provider of MEP building systems in the US, poised for continued growth driven by strong construction demand and a skilled labor shortage, while maintaining a focus on profitability, employee retention, and successful acquisitions.
Read the full thesisComfort Systems is a leading non-union MEP contracting firm in the U.S. that is poised for growth and higher margins due to a skilled labor shortage and strong demand in construction.
Read the full thesis- Polen US Smid Company GrowthMarch 2025
Comfort Systems is a leading mechanical, electrical, and plumbing provider with a strong track record in new construction and a mid-teens earnings growth outlook, primarily focused on commercial and industrial markets.
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