California ports are busy, tariffs are shifting trade routes, and clean energy projects are reshaping how goods move in and out of the country. That mix is creating fresh winners and new risks for companies tied to ports, rail and power systems. This article walks through three stocks from our U.S. Port-Linked Industrial & Clean Infrastructure Stocks screener that appear most exposed to the latest news and explains why that might matter for your portfolio.

The stocks covered below are just a small sample of this theme and the full screen also surfaced 25 more companies with similarly detailed stories that are not included here.

If you want to identify your own angles on this theme, head straight into the U.S. Port-Linked Industrial & Clean Infrastructure Stocks screener to filter, analyze, and focus on the highest conviction ideas for your watchlist.

Primoris Services (PRIM)

Overview: Primoris Services is an infrastructure contractor that builds and maintains utility, energy, and transportation projects across the U.S. and Canada, from gas and electric networks to renewable energy and industrial facilities. The company works for utilities, energy producers, and government agencies, often under long term service and construction contracts.

Operations: Primoris generates about US$4.6b of revenue from its Energy segment and US$2.8b from Utilities, with the vast majority of revenue coming from projects in the United States.

Market Cap: US$4.5b

Primoris Services sits right at the crossroads of several big themes in the screener, including California port infrastructure, grid upgrades, and renewables buildout. Yet the stock is still priced below some estimates of fair value and analyst targets. The company has a large and diversified backlog across utilities, gas generation, pipelines, and renewables, which helps offset near term pressure from weaker solar and energy storage activity and recent margin strain. Management commentary suggests tariff risk is largely passed through to customers, limiting some cost shock from the latest trade shifts. At the same time, investors need to weigh recent earnings volatility, lower 2026 guidance, insider selling, and reliance on competitive end markets. The balance of those forces is where this story gets interesting.

Primoris Services appears to be a case where valuation skepticism may be obscuring the underlying signal. Get the full picture on backlog strength, tariff pass through, and margin risk in the 3 key rewards and 3 important warning signs

Build your own port linked infrastructure watchlist

Primoris Services and the two other stocks in this article all came from a single screener, but the real edge is in shaping one around your own thesis. Use our flexible Screener to mix filters like valuation, growth, balance sheet and risks, or jump straight into our curated Investing Ideas for ready made themes.

MasTec (MTZ)

Overview: MasTec is an infrastructure contractor that designs, builds, and maintains large scale communications, energy, utility, and industrial projects across the United States and Canada, from fiber and 5G networks to power lines, pipelines, renewable power plants, and data center electrical systems.

Operations: MasTec generates about US$5.6b from Clean Energy and Infrastructure, US$4.5b from Power Delivery, US$3.5b from Communications, and US$2.6b from Pipeline Infrastructure, with virtually all of its roughly US$16.1b in revenue coming from the United States.

Market Cap: US$23.6b

MasTec sits at the heart of the port linked and clean infrastructure theme because the same skills it uses for grid upgrades, pipelines, and renewable projects are needed for the modern, lower carbon freight hubs now being planned around California ports. Record backlog of US$21.4b, strong exposure to data centers through the Superior Group acquisition, and analyst attention to its valuation and growth profile have drawn interest, even as the P/E multiple looks full. At the same time, high debt, heavy investment to support growth, and dependence on large customers mean any slowdown in project awards or policy support could affect margins. If you care about how tariff risk, port electrification, and a crowded balance sheet interact, MasTec may warrant closer consideration.

MasTec’s accelerating role in clean energy, data centers, and port electrification is easy to see. What investors often miss is how its record backlog and debt profile really fit together in the MasTec financial health report

Quanta Services (PWR)

Overview: Quanta Services is a large infrastructure contractor that builds and maintains the electric grid, gas networks, pipelines, communications systems, and power facilities that utilities, data centers, and industrial customers rely on across North America and select international markets.

Operations: Quanta generates about US$26.9b of revenue from Electric Infrastructure Solutions and US$6.0b from Underground Utility and Infrastructure Solutions, with most activity tied to U.S. projects that support power, gas, and industrial systems.

Market Cap: US$103.1b

Investors watching California’s push toward “ports of the future” may consider keeping Quanta Services on the radar because it sits at the intersection of port electrification, grid expansion, and large power hungry sites such as data centers. The company reports strong earnings and revenue growth, a large and growing backlog, and recently raised both its 2026 guidance and free cash flow outlook, supported by faster cash collection. At the same time, Quanta carries high debt and trades on a rich multiple, so expectations are already elevated and setbacks on big projects or funding costs could affect the stock. The key question is whether this grid and electrification specialist can continue to justify that premium as infrastructure spending around ports and large load centers accelerates.

Quanta Services looks like a premium grid and port electrification story where rich expectations may be masking the real hinge points. Get the full 2 key rewards and 1 important warning sign

Seeking Fresh Alternatives Before Others Do

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This article by Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned.