[{"_1":2,"_3":-5,"_4":-5},"loaderData",{"_5":6},"actionData","errors","routes/website/blogs/blog-post",{"_7":8},"article",{"_9":10,"_11":12,"_13":14,"_15":16,"_17":18,"_19":20,"_21":22,"_23":24,"_25":26,"_27":-5,"_28":-5,"_29":30},"id","c63c69f2-752d-4047-acdc-cfe77e4dcd5a","type","stock_of_the_week","slug","screen-of-the-week-5-what-the-ai-build-out-physically-runs-on","cover_image","https://eu.imitari.app/a5-capital/articles/2026/08/card-funnel-22fe0a00.png","title","What the AI build-out physically runs on","description","Nineteen companies out of more than 3,600 hold a maximum score on mission criticality, barriers to entry and AI resilience at the same time. Almost none of them write code.","published_at",["D",1787668260000],"updated_at",["D",1789722809690],"body","Nineteen companies out of more than 3,600 hold a maximum score on mission criticality, barriers to entry and AI resilience at the same time. Almost none of them write code.\n\n## **The screen**\n\nMost screens built around artificial intelligence end up holding software. This one does not. I asked Baseline for companies that score maximum on three fields at the same time: how badly the world needs them, how hard they are to enter, and how well they hold up as machine capability improves.\n\nNineteen names clear all three. That is half a percent of the scored universe, and the list reads like an inventory of physical infrastructure.\n\n## **The criteria**\n\nThree fields, each at 5 out of 5, no partial credit.\n\n- **Mission Criticality 5.** The customer’s operation stops without this company. 245 names in the universe score a 5.\n- **Barriers to Entry 5.** Capital, regulation or physics keeps new entrants out. 108 names score a 5.\n- **AGI Scenario 5.** The business is insulated from, or gains from, cheap and abundant machine cognition. 117 names score a 5.\n\n![](https://substackcdn.com/image/fetch/$s_!1dss!,w_1456,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F84a69b97-6d43-4a33-bd4f-d3c451c6f152_3200x1800.png)\n\nHow the screen narrows, 3,638 down to 19. Optional but it earns its place.\n\n## **The nineteen**\n\n \n\n**ASML TSMC, Shin-Etsu Chemical, VeriSign, Constellation Energy, GE Aerospace, Safran, TransDigm, BAE Systems, Northrop Grumman, Huntington Ingalls, BWX Technologies, Norfolk Southern, Perimeter Solutions, Aena, Copenhagen Airports, ENAV, Japan Exchange Group, CK Infrastructure**\n\nEleven industrials, two utilities, three technology names that all make physical objects or run a registry, one materials company, one exchange. The lithography, the wafers, the reactors, the jet engines, the runways, the air traffic control, the freight rail. This is the layer underneath the layer everyone is arguing about.\n\n![](https://substackcdn.com/image/fetch/$s_!8pwP!,w_1456,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fb97ad1f5-6c8f-4af2-9207-35c865ab5dad_3200x1800.png)\n\n## **Worth a second look**\n\n### **Constellation Energy**\n\nThe largest nuclear fleet in the United States at 22.1 GW, against 6.3 GW at Vistra in the next position. Roughly three and a half times the nearest merchant operator, running at a 94.7% capacity factor, the highest three-year total among US nuclear operators for five consecutive years. Around 183 TWh a year at close to zero marginal cost.\n\nOur barriers to entry panel makes the argument better than I can. It notes that hyperscalers signing long-term power purchase agreements\n\n> “rather than building their own capacity confirms that even the world’s most capitalized firms view CEG’s assets as an insurmountable physical and regulatory fortress.”\n\nMicrosoft and Meta both signed twenty-year deals. When the best-funded companies on earth decide to rent rather than build, that is a competitive position being priced by the people best placed to attack it.\n\nThe economics behind it: the IRA Section 45U production tax credit sets an inflation-linked floor around $40 to $44 per MWh through 2032. Hyperscaler contracts land at roughly $70 to $115. Only about 9% of the fleet is contracted that way so far, with 147 million MWh of nuclear output still uncommitted.\n\n### [**VeriSignVRSN.US**](http://VeriSignVRSN.US)\n\nThe odd one on the list, and the reason I like it. VeriSign runs the .com and .net registries under a government-sanctioned monopoly that our barriers to entry panel describes as rendering direct competition illegal and technically impossible. Twenty-nine years of uninterrupted uptime. Gross margins near 88%, capital expenditure at 1.4% of revenue, and contractual rights to 7% annual price increases resuming in 2027 under agreements running to 2030.\n\nThe AI logic is simple. Every business that exists online, including every AI company, pays a toll to be findable. That toll is charged per name, not per query, and it does not care whether a human or a model wrote the page.\n\n> “Its moat is regulatory and technical, sitting at a layer of the internet stack that AGI cannot bypass or replicate.”\n\n![](https://substackcdn.com/image/fetch/$s_!0tXf!,w_1456,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fc20235e4-3eea-4a65-b441-ffe0a8dbd0dc_3200x1800.png)\n\n### **Perimeter **[**Solutions**](http://SolutionsPRM.US)\n\nPerimeter makes Phos-Chek, the aerial fire retardant dropped from tanker aircraft, and holds what our panel calls a restored monopoly in North America after its only credible competitor failed on technical grounds in 2025. The moat is the Forest Service Qualified Products List, a certification gauntlet that has defeated well-capitalised entrants before, plus physical mixing infrastructure at more than 150 air tanker bases. EBITDA margins around 59% to 65%. The product is roughly 5% of total firefighting cost and 100% necessary.\n\nIt sits on an AI screen because it is about as far from cognitive labour as a listed business gets.\n\n## **One honest caveat**\n\nThe three fields I screened on overlap. A business that is physically indispensable and capital-hungry will tend to score well on all three by construction, so this screen is finding a category rather than uncovering an anomaly. What is real is the scarcity of the triple maximum, and the specific list it produces.\n\nThere is a second caveat, on Constellation specifically, and it comes from our own panels rather than from me. Somewhere between a quarter and a third of EBITDA depends on the 45U credit, which expires in 2032. Our risks panel names the resulting earnings cliff directly. The Calpine acquisition at $26.6 billion is unproven and dilutive by around 15%. And on current margins and free cash flow conversion, Vistra is the better business. The case here rests on scarcity of the asset rather than on today’s numbers.","seo_title","seo_description","created_at",["D",1787653762241]]