MTZ vs PRIM: Which Is the Better Buy in 2026?

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.

Reading it: PRIM 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. MTZ and PRIM 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 MTZ and PRIM 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.

MasTec (NYSE: MTZ) is a Coral Gables, Florida based engineering and construction firm that builds and maintains large-scale infrastructure across four segments: Communications (wireless and wireline/fiber), Power Delivery (utility transmission and distribution), Pipeline Infrastructure (natural gas installation and maintenance), and Clean Energy and Infrastructure (renewables engineering, construction, and heavy civil). The company works for utilities, telecom carriers, energy operators, and government customers, and grows both organically and through acquisitions such as the roughly $1.65 billion planned Superior Group deal.

Full MTZ guide

Primoris Services Corporation (NYSE: PRIM) is a specialty infrastructure contractor that operates through two segments. The Utilities segment installs and maintains natural gas and electric distribution and transmission systems plus communications networks under long-term Master Service Agreements, while the Energy segment provides engineering, procurement, construction, and maintenance for renewables, energy storage, gas-fired power, renewable fuels, and petrochemical customers. Full-year 2025 revenue was roughly $7.57 billion, up about 19 percent, with EPS near $5.09, reflecting strong renewables and utility demand.

Full PRIM guide

Both fit overlapping themes, but they are not interchangeable. The useful comparison is which set of drivers and risks you want exposure to.

• MTZ drivers: Record backlog and demand acceleration; Grid, data-center, and electrification tailwinds.
• PRIM drivers: Grid and utility MSA demand; Renewables and energy storage buildout.

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: MasTec is cyclical and project-based, so revenue and margins can swing with customer capital budgets, permitting delays, weather, and the timing of large contracts. For PRIM, primoris is a project-based engineering and construction firm, so results are cyclical and lumpy: fixed-price contracts carry execution, cost-overrun, and timing risk, which showed up in the Energy segment renewables weakness in Q1 2026.

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 MTZ if you believe its drivers more; PRIM 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 MTZ and PRIM guides.

MTZ. MasTec is a large-cap infrastructure contractor trading at a premium multiple, with a trailing P/E in the low-to-mid 60s reflecting strong expected earnings growth. Management raised 2026 guidance after a record Q1, targeting roughly $17.5 billion in revenue and about $8.79 in adjusted EPS. The valuation prices in continued backlog conversion, so results relative to that growth path matter more than the absolute multiple.

PRIM. In mid-July 2026 PRIM traded near the high $80s with a market cap around $4.8 billion and a trailing P/E near 19x on FY2025 EPS of about $5.09. Q1 2026 revenue fell about 5 percent to roughly $1.6 billion on Energy segment weakness, but management raised full-year 2026 guidance to net income of about $223 million to $234 million. The dividend yield is small (under half a percent), so valuation rests mainly on backlog and earnings growth.

Headline figures (approximate, JULY 2026): MTZ shows revenue (2025 fy) ~$14.3B, revenue (ttm) ~$15B, 2026 revenue guidance ~$17.5B, adjusted diluted eps (2025) ~$6.55; PRIM shows revenue (fy2025) ~$7.57B, revenue (q1 2026) ~$1.6B (down ~5%), eps (fy2025) ~$5.09, total backlog ~$11.6B.

MTZ and PRIM 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 MTZ and PRIM exposure against your real portfolio. It is not an investment adviser.