The AI Infrastructure Stocks screener focuses on the hardware backbone that makes AI possible, at a time when global data, energy and inflation trends are front of mind for markets. With manufacturing PMIs firming in the US, services growth mixed in Europe and the UK, and central banks still wrestling with inflation, many investors are looking for business models tied to real assets and cash flow. This screener concentrates on companies that help build and run the specialized data centers, cooling systems and power networks AI needs. In this article, you will see 3 of the strongest stocks from that list.

Western Digital (WDC)

Overview: Western Digital is a long-established data storage company that designs and sells hard disk drives and related storage systems for data centers, PCs, and consumer devices across the Americas, Asia, Europe, the Middle East, and Africa, serving both large cloud providers and retail customers.

Operations: Western Digital generates about US$11.8b in revenue primarily from Hard Disk Drives, with reported geographic revenue including US$2.1b from Europe, the Middle East and Africa and a sizable segment adjustment of US$9.7b.

Market Cap: US$231.2b

Western Digital sits at the center of AI data storage, supplying high capacity HDDs and platforms to top hyperscalers that have multi year commitments tied to AI data center buildouts. The company is benefiting from very strong earnings, high net margins and analyst expectations of solid revenue and profit growth, underpinned by technologies such as UltraSMR and HAMR and a collaboration on quantum error correction. However, heavy reliance on a small group of cloud customers, exposure to tariffs and the risk that alternative storage technologies gain share could pressure future margins and growth. For investors, the key issue is whether the current valuation and analyst expectations properly reflect that mix of strength and concentration risk.

Western Digital’s AI storage story looks powerful, but the real tension is whether today’s strength justifies the expectations already priced in, or if markets are missing a key piece in the 3 key rewards and 2 important warning signs (1 is major!)

Lumentum Holdings (LITE)

Overview: Lumentum Holdings supplies the lasers, optical chips and modules that move data inside cloud and AI data centers, and it also sells industrial lasers used in semiconductor, solar, display and electric vehicle manufacturing, giving it exposure to both digital infrastructure and advanced manufacturing.

Operations: Lumentum reports revenue from across Japan, Mexico, Thailand, Hong Kong, the United States, other Americas and other Asia Pacific regions, with US$523.1m from the United States, US$494.4m from Thailand and US$460.7m from Hong Kong, alongside a segment adjustment of US$142.4m.

Market Cap: US$64.4b

Lumentum operates where AI networking demand meets real hardware, supplying high speed optics that analysts link directly to Nvidia driven data center builds and a large optical component backlog. The company has also attracted a US$2b strategic investment from Nvidia. Some analysts describe a combination of strong earnings and revenue forecasts, recent profitability and improving margins as supporting a recovery narrative. At the same time, a high P/E ratio, elevated debt levels, insider selling and reliance on a concentrated group of hyperscale cloud customers suggest expectations are already set high. For investors, an important question is whether this mix of AI demand and financial momentum sufficiently offsets funding and cyclicality risks that may matter more than they first appear.

Lumentum’s AI optics story is gathering pace, but the real question is whether recent profitability and that US$2b Nvidia backing fully show up in the 4 key rewards and 2 important warning signs

Fermi (FRMI)

Overview: Fermi develops and owns private, grid independent power and high performance computing campuses in the United States, building large scale energy and data infrastructure that can be leased on long term contracts to AI focused data centers and chip ecosystem tenants.

Market Cap: US$5.5b

Fermi is attracting attention because it sits at the junction of AI data center demand and scarce large scale power, with multi gigawatt permits at Project Matador that potential tenants, including hyperscalers and chip companies, appear to be competing for. At the same time, Fermi is still pre revenue, reported a net loss of US$188.69m in Q1 2026 and faces governance turmoil around former CEO Toby Neugebauer and board control, alongside insider selling and heavy dependence on project finance. For investors, the appeal is a high growth, power backed AI infrastructure story that screens as heavily discounted, but with execution, funding and governance questions that make the full 2 key rewards and 3 important warning signs (2 are major!)

Fermi’s pre revenue, power backed AI campuses could be the kind of early stage story investors revisit later and wonder how they missed it. Get the full context in the 2 key rewards and 3 important warning signs (2 are major!)

The three companies here are just a starting point, with the full AI Infrastructure Stocks screener uncovering 46 more companies that pair physical AI infrastructure with equally compelling revenue and cash flow stories in the AI Infrastructure Stocks screener. You can use Simply Wall St to identify and analyze the exact catalysts, balance sheet strength and business narratives that fit your own highest conviction AI infrastructure ideas.

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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.