FIX vs VRT: How Comfort Systems USA and Vertiv Holdings Compare (2026)
Last updated August 2026
Short answer
VRT is the larger of the two ($93.00B market cap): the incumbent the market prices for continued execution (26.65x forward earnings, beta 2.03). FIX is the smaller challenger ($60.88B), priced similarly on forward earnings (28.81x): more room to run, but more to prove. The real question is which set of drivers you believe, and whether owning one (or both) leaves you over-concentrated.
FIX vs VRT: the tie-breaker metrics
Same yardstick, side by side (as of August 2026). Valuation lined up like this is most meaningful for two names in the same corner of the market, which these are. Figures are approximate; verify before investing.
| Metric | FIX | VRT | What it tells you |
|---|---|---|---|
| Market cap | $60.88B | $93.00B | Size. The larger name is the incumbent; the smaller has more room to grow and more to prove. |
| Forward P/E | 28.81 | 26.65 | Valuation on next year's expected earnings, the same yardstick for both. Lower is cheaper for that growth; higher means the market is paying up. |
| Trailing P/E | 42.55 | 54.65 | Valuation on the last 12 months. A big drop from trailing to forward means the market expects earnings to jump, so more growth is already in the price. |
| Beta | 1.66 | 2.03 | Volatility vs the market. Above 1 swings harder than the index; below 1 is steadier. Higher beta means bigger drawdowns to hold through. |
| Price vs 52-week range | 76% of range | 47% of range | Where today's price sits between the 52-week low and high. Near the high is momentum with less margin of safety; near the low is out of favor or a discount, depending on why. |
| Price / book | 94.24 | 21.85 | How much you pay over book value. Very high can signal an asset-light, high-return business or a rich price. |
Before you buy: how FIX and VRT affect your concentration
The metrics above tell you which is the marginally better business. The bigger risk for most people is not picking the slightly worse stock, it is over-concentrating. FIX and VRT share themes, so owning both, or adding either to what you already hold, can quietly push a large share of your portfolio into one bet.
This is the part a generic comparison page cannot answer, because it depends on what you own. Connect your brokerage and Walnut shows your real, combined FIX and VRT exposure, flags overlap with your existing positions, and tells you if adding one would tip you past a concentration you are comfortable with, read-only by default, with your login staying at your broker. Walnut is not an investment adviser.
What does Comfort Systems USA (FIX) do?
Comfort Systems USA is one of the largest mechanical, electrical, and plumbing (MEP) construction service providers in the United States. The company provides design, installation, and service of heating, ventilation, air conditioning (HVAC), plumbing, electrical, and piping systems for commercial, industrial, and institutional customers. End markets include data centers, semiconductor fabs, life sciences facilities, healthcare buildings, schools, and various other non-residential construction.
What does Vertiv Holdings (VRT) do?
Vertiv Holdings designs and manufactures the power and cooling infrastructure inside data centers. The company's products include uninterruptible power supplies (UPS), power distribution units (PDUs), busways and rack power, computer room air conditioning (CRAC) units, liquid cooling systems, and increasingly the integrated thermal management solutions required to cool AI training racks at high density.
FIX vs VRT: how do they differ?
Both fit overlapping themes, but they are not interchangeable. The useful comparison is which set of drivers and risks you want exposure to.
- FIX drivers: Data center construction; Semiconductor fab buildouts.
- VRT drivers: AI rack power and cooling; Liquid cooling adoption.
Which fits which kind of investor
A faster-growing, richer-valued name usually swings harder, so it suits a longer horizon and a higher tolerance for volatility; a steadier, more cash-generative business suits a more conservative or income-minded investor. The honest test is which set of risks you could hold through a drawdown: Construction cyclicality. For VRT, hyperscaler AI capex concentration is the primary risk.
FIX or VRT: which should you pick?
Growth-minded investors who believe the theme has years to run tend to accept the richer multiple for more upside; value-minded investors lean toward the cheaper forward earnings and steadier profile. Pick FIX if you believe its drivers more; VRT if you believe its. Many investors hold both, but since they share themes, that is a concentrated bet, not diversification. Decide deliberately and check overlap. For the full detail, see the FIX and VRT guides.
FIX vs VRT: the full fundamentals
FIX. Comfort Systems trades at a premium to traditional construction contractors, reflecting data center end-market exposure and backlog visibility. The multiple has expanded with the AI data center thesis.
VRT. Vertiv trades at a premium reflecting the AI buildout tailwind, the demonstrated operating leverage, and the visibility from order backlog. The multiple is sensitive to AI capex cycle expectations; would compress on any hyperscaler pause.
Headline figures (approximate, early 2026): FIX shows revenue (ttm) ~$7 billion, operating margin ~11% (improving with mix), net income (ttm) ~$600 million, eps (ttm) ~$17.00; VRT shows revenue (ttm) ~$9 billion, operating margin ~18% (improving), net income (ttm) ~$1 billion, eps (ttm) ~$2.50.
The bottom line: FIX vs VRT
FIX and VRT are related but distinct: same themes, different businesses and risks. Neither wins in the abstract; the right pick is whichever thesis you actually believe, sized so you are not over-concentrated in one theme. Walnut can show your combined FIX and VRT exposure against your real portfolio. It is not an investment adviser.
Wondering how FIX or VRT fits the portfolio you already own? Walnut is an AI investing app that connects your brokerage read-only and answers questions like that about your actual holdings: overlap, concentration, and how each position tracks the S&P 500. Compare the best AI portfolio analyzers or see the best AI investing apps in 2026.
Investing in Comfort Systems USA with AI
Connect the broker you already use and ask Walnut's AI how FIX fits what you actually hold: whether you own it already through a fund, what it would do to your concentration, and how it has tracked the S&P 500. Read-only by default, and you approve anything before it reaches your broker.
FAQ
What is the difference between FIX and VRT?
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Comfort Systems USA is one of the largest mechanical, electrical, and plumbing (MEP) construction service providers in the United States. Vertiv Holdings designs and manufactures the power and cooling infrastructure inside data centers. They show up together because they share investment themes, but they are different businesses, so the better fit depends on which thesis you are expressing.
Is FIX or VRT the better stock?
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Neither is universally better. VRT is the larger incumbent; FIX is the smaller challenger and looks pricier on forward earnings. Walnut is informational, not investment advice. Compare what each does, the tie-breaker metrics above, and the risks, then decide which fits your thesis and what you already own.
Which is cheaper, FIX or VRT?
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On forward P/E (as of August 2026), FIX trades at 28.81x and VRT at 26.65x, so VRT is the cheaper of the two on next year's expected earnings. A lower multiple is not automatically the better buy: a richer valuation can be justified by faster growth, and a lower one can reflect real risk. Weigh the multiple against how fast each business is compounding.
Should you own both FIX and VRT?
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Because they share themes, owning both concentrates you in that theme. That can be intentional (a focused bet) or accidental (less diversification than it looks). Walnut can show your combined exposure across both, and whether adding either over-concentrates you, before you buy.
What are the risks of FIX vs VRT?
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FIX: Construction cyclicality. Hyperscaler AI capex concentration creates revenue concentration. Labor availability (skilled trades) constrains capacity to capture demand. Margin pressure during labor inflation periods. VRT: Hyperscaler AI capex concentration is the primary risk. A pause or reduction in AI data center buildouts would directly impact Vertiv's order book. Competition from larger industrial players (Schneider, Eaton) intensifies as AI cooling becomes mainstream.
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Walnut is informational, not investment advice. This page is descriptive and not a recommendation to buy or sell FIX or VRT; figures are approximate and dated (as of August 2026). Verify current data before investing.