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

Same yardstick, side by side (as of November 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.

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. MWH 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 MWH 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.

SOLV Energy designs, builds, commissions, operates and repowers large power projects, mostly utility-scale solar farms, co-located and standalone battery storage, and the high-voltage substations and transmission connections that tie them to the grid. It does not own the plants. Developers, independent power producers and utilities hire it under engineering, procurement and construction contracts, and it then keeps many of those same sites on long-term operations and maintenance agreements. The scale is the point: roughly 21 GW built across more than 500 power plants, about 22 GW under O&M contract across roughly 150 plants, and around 2,600 employees from a San Diego headquarters. Third-party rankings put it second in the Americas in solar EPC, in battery storage EPC, and in solar and storage O&M. The ticker, MWH, is a megawatt-hour.

Full MWH 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, on the back of 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.

• MWH drivers: Power demand pulling the build-out forward; Storage and high-voltage scope, not just panels.
• 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: This is project-based construction, so results are lumpy and seasonal: the first quarter of 2026 produced $93 million of adjusted EBITDA but a GAAP net loss near $23 million, while the second quarter swung to $66.8 million of net income on $117 million of adjusted EBITDA. 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, and in 2026 that risk turned into a loss-making second quarter and a guidance cut of more than half on six solar projects.

Pick MWH 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 MWH and PRIM guides.

MWH. Trailing and forward multiples tell different stories here, which is normal for a business whose revenue grew about 77% in its latest quarter. On trailing numbers the stock screens at roughly 51 times earnings and under 10 times EV/EBITDA, while on next year's consensus EPS of about $1.70 it trades near 14 times. Eleven analysts cover the name with an average target of about $43, well above the $24.02 close, a gap that reflects genuine disagreement about margins and how much of the backlog converts on schedule.

PRIM. At about $73.63 PRIM trades near 28.8 times depressed trailing earnings but only about 14 times analysts' 2027 EPS estimate of roughly $5.19, so the valuation now hinges on whether earnings snap back once the solar projects are finished. The stock is down about 44 percent in 2026 after the guidance cut, and the average analyst target of about $117 across 15 analysts sits well above the share price. The dividend yield is small (under half a percent), so valuation rests mainly on margin recovery and backlog conversion.

Headline figures (approximate, October 2026): MWH shows revenue (ttm) ~$3.17 billion; Q2 2026 revenue ~$951 million, up ~77% year over year, margins (ttm) ~17.5% gross, ~8.0% operating, ~3.8% net, net income / eps (ttm) ~$119 million, ~$0.47 per share; Q2 EPS $0.33 vs ~$0.24 expected, backlog ~$8.9 billion, up ~44% year over year, plus ~22 GW under O&M contract; PRIM shows revenue (ttm) ~$7.28B, down ~10.7% year over year in Q2 2026, latest quarter (q2 2026) Revenue ~$1.69B; net loss ~$24M; adjusted EPS ~$(0.27) vs ~$(0.36) estimate, net income (ttm) ~$140M; profit margin ~1.9%, 2026 eps guidance ~$1.30 to $1.85, cut from $4.05 to $4.25.

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