FIX vs STRL: Which Is the Better Buy in 2026?

Same yardstick, side by side (as of October 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.

Reading it: STRL is the cheaper of the two on forward earnings, but cheaper is not the same as better. Pair the valuation with growth (how far the forward P/E sits below the trailing P/E) and risk (beta) before you decide.

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 STRL 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 STRL 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.

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.

Full FIX guide

Sterling Infrastructure is a specialty infrastructure construction company organized around three segments. E-Infrastructure Solutions provides site development for data centers, distribution centers, e-commerce fulfillment facilities, and other large industrial sites. Transportation Solutions provides heavy civil construction for highways, bridges, ports, and aviation. Building Solutions provides concrete services for residential and commercial construction.

Full STRL guide

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.
• STRL drivers: Data center site development; Reshoring industrial site development.

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 STRL, customer concentration in hyperscaler data center work: if a few large customers slow or pause campus programs, E-Infrastructure backlog and margins would feel it quickly.

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; STRL 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 STRL guides.

FIX. Comfort Systems trades at a clear premium to traditional construction contractors, about 36 times trailing earnings, because earnings are compounding fast on data center demand; on 2027 consensus EPS of about $60 the multiple is near 24. The October pullback trimmed the valuation from its summer peak, and the October 22 report is the next check on whether growth justifies it. Figures are as of October 16, 2026 and change daily.

STRL. Sterling trades at a premium to traditional construction because of its data center and reshoring exposure, but the multiple has compressed sharply since its summer 2026 peak even as estimates rose, leaving the stock near ~17x 2027 consensus. The cash balance exceeds debt, so the volatility is about expectations rather than balance-sheet strain. Third-quarter results on October 28, 2026 come with consensus near ~$6.17 of EPS on ~$1.19 billion of revenue.

Headline figures (approximate, October 2026): FIX shows revenue (ttm) ~$11.2 billion; up ~50% year over year in Q2 2026, operating margin ~17% (gross ~26%), net income (ttm) ~$1.43 billion, eps ~$40.64 trailing; Q2 2026 $12.53 vs ~$10.46 consensus; 2026 consensus ~$49; STRL shows revenue (ttm) ~$3.44 billion; Q2 2026 ~$1.17 billion, up ~90% year over year, operating margin ~20% trailing (gross ~24%, net ~12.6%), net income (ttm) ~$431 million, eps (ttm) ~$13.88; Q2 2026 ~$5.80 vs ~$5.25 expected.

FIX and STRL 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 STRL exposure against your real portfolio. It is not an investment adviser.