With fresh US tariffs on imported polysilicon and new incentives for domestic production, the quiet world of semiconductor materials has suddenly moved to center stage. This policy shift could reshape where critical inputs for chips and solar panels are sourced, which matters for investors watching supply chains and pricing power. This article walks through 3 US semiconductor materials stocks exposed to this news and how each might fit, or might not fit, in a portfolio.

The stocks highlighted below are just a starting sample. The full screen surfaced 24 more US semiconductor materials companies with similarly compelling supply chain stories that are not covered here. To identify and analyze the rest of this opportunity set, head straight into the US Semiconductor Materials screener.

Minerals Technologies (MTX)

Minerals Technologies is a diversified minerals and materials company that supplies everything from cat litter and personal care ingredients to high temperature products used in steel, foundry and infrastructure projects, as well as environmental and water treatment solutions. It generates roughly US$1.1b from Consumer & Specialties and about US$1.0b from Engineered Solutions, giving it meaningful exposure to both everyday consumer goods and industrial end markets. At a market cap of about US$2.4b, it sits in the mid cap bracket where company specific execution can really matter.

Investors watching the polysilicon tariffs and push for more US based materials supply may find Minerals Technologies worth a closer look. The company supplies specialty minerals into higher value applications, has been highlighting record profitability in its Engineered Solutions segment, and is leaning into sustainability focused products that many customers now actively seek. At the same time, it is still dealing with weaker paper related demand, legal overhang from talc litigation and a balance sheet that relies heavily on external borrowing. How that mix of opportunity and risk shakes out, especially as US policy supports domestic materials capacity, is where this story gets more interesting for a semiconductor materials screen.

Minerals Technologies is focusing on higher value minerals, record Engineered Solutions profitability and sustainability products, yet its debt load and talc litigation still hang over the story. Get the fuller risk reward picture in the 3 key rewards and 1 important warning sign

Build your own specialty materials shortlist

Minerals Technologies and the two other stocks in this article all came out of a single screener, which is exactly how many readers start to spot patterns around balance sheets, risks and end market exposure. Use our flexible Screener to mix your own filters, or lean on the structure of our curated Investing Ideas.

Perimeter Solutions (PRM)

Perimeter Solutions supplies fire retardants, firefighting foams, specialty chemicals and engineered machinery that support wildfire management, industrial processes and complex medical devices. It generates about US$506 million from Fire Safety and around US$251 million from Specialty Products, giving it a mix of government backed contracts and industrial customers. With a market cap of roughly US$5.7b, Perimeter Solutions sits in the larger mid cap bracket where contract quality, capital allocation and execution can be important to watch.

Perimeter Solutions sits at the intersection of wildfire management and specialty chemicals, with long term contracts in Fire Safety and a fast growing Specialty Products division that helped lift adjusted EBITDA in the latest quarter. Earnings remain under pressure and the stock trades on richer P/S multiples than many US Chemicals peers. The balance sheet leans heavily on external borrowing and insiders have been selling shares. For investors interested in companies tied to critical infrastructure and emergency response, plus exposure to specialty additives that touch batteries and other technical markets, the combination of contract backed revenue, active M&A and a company specific turnaround story may be worth closer attention.

Perimeter Solutions operates at the intersection of contract-backed fire safety and specialty additives that serve battery and technical markets. See how the full story lines up across growth, leverage and insider selling in the analysis report for Perimeter Solutions

Materion (MTRN)

Materion is a US based producer of advanced engineered materials used in semiconductors, aerospace and defense, energy, automotive and other high performance applications. Its products range from specialty alloys and metal matrix composites to thin film coatings and optical filters that sit inside chip fabrication equipment, data centers and mission critical hardware worldwide. The company has a market cap of about US$6.2b.

Materion sits right in the flow of the polysilicon story because it supplies high purity materials and deposition targets that chipmakers and equipment suppliers need. As a result, policies that support US centric semiconductor supply chains can be important for its order book. Recent results show record sales and earnings across all segments, supported by demand from semiconductors, data centers linked to AI infrastructure, energy and defense. The flip side is a rich valuation, high reliance on external borrowing and pressure from China focused competitors, plus meaningful insider selling over the past few months. For investors who want exposure to the materials that make advanced chips and satellites work, Materion is a stock where the reward potential comes with execution and policy risk attached.

Materion sits at the crossroads of record sales, high purity chip materials, and pressure from richer valuation and borrowing. See how that balance plays out in the 2 key rewards and 3 important warning signs

Seeking Fresh Alternatives Beyond Semiconductors

Market momentum can shift fast and the best opportunities often move from quiet to crowded in weeks. Scan these fresh stock ideas before the window narrows and consider your options promptly.

• Spot companies focused on resilient income and steady cash flows by scanning the 9 dividend fortresses while yields are still flying under most investors' radar.
• Track potential growth leaders tied to AI infrastructure before their stories are fully reflected in current prices by running the 56 AI infrastructure stocks while it remains relevant.
• Look for under the radar, cash-generative small caps that may be preparing for their next phase of development with the 69 profitable AI stocks that aren't just burning cash.

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.