Someone has to build the AI boom.
The companies training and serving models get the headlines. The companies selling them power, buildings, cooling, silicon and software get the invoices. This brief covers the ones worth calling, and how to sell into each.
Europe's AI money has moved down the stack. In the first half of 2026 the region raised €18.7bn across 423 deals, and the largest single destination was not artificial intelligence at €3.2bn but cloud and data centres at €5.9bn. The binding constraint stopped being chips some time ago. It is now electricity, grid connections, land, cooling and the people who install all of it.
That has pulled a very different set of companies into the AI trade: developers who think in megawatts and planning cycles, contractors who install chilled-water plant, and a thin layer of software companies making borrowed GPUs behave like owned ones. None of them are AI companies. All of them are being paid by one.
What’s inside.
Land, shell and the operators
The people who own or build the building. Longest sales cycles on the list and the largest single contracts. They buy design, plant, fit-out and everything that reduces time-to-energisation — and they buy it years before the tenant moves in.
One of the few UK operators that was designing for high-density compute before the current cycle, which means it is quoted as a reference by people specifying new capacity. Its campuses are a proving ground for liquid cooling at production scale.
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In the full briefingSits directly in the Slough and West London cluster where most UK AI capacity is landing. Every new campus is a fresh procurement round across power, cooling, security and fit-out.
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In the full briefingPublic-sector and regulated workloads are moving to accredited environments rather than to public cloud, which keeps Ark buying steadily through cycles that slow everyone else down.
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In the full briefingA build-to-suit model means the entire supply chain is re-specified per project, and project teams are stood up quickly. Hiring into a new region is usually the first public sign of a programme.
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In the full briefingThe regional edge story matters as inference workloads spread out from central campuses. A different buying pattern to hyperscale: more sites, smaller contracts, faster decisions.
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In the full briefingPower and the grid
The actual constraint. Grid connection queues have made bridging power, on-site generation and flexibility services into a market of their own. Buyers here are under time pressure that the rest of the chain does not feel.
Grid connection dates slipping is the single most common failure mode in this market, and bridging power is what a developer buys when it happens. That makes Aggreko a barometer for where projects are running late.
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In the full briefingData centre operators are becoming energy traders whether they intended to or not. The advisory relationship here often precedes the infrastructure spend by a year or more.
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In the full briefingCooling and critical plant
Rack densities for AI training have broken air cooling. Everything from chilled water to direct-to-chip liquid is being specified again from scratch, which reopens supplier decisions that were settled a decade ago.
Silicon and the software layer
The thinnest and fastest-moving segment. Chip designers, AI clouds and the orchestration software that makes rented capacity usable. Small teams, venture money, and buying decisions made in weeks rather than quarters.
More from the list.
| Company | Sector | Based | Staff |
|---|---|---|---|
| Nokia | Telecommunications | Espoo | 101,282 |
| Deutsche Telekom | Telecommunications | Bonn | 67,771 |
| ASML | Industry & Manufacturing | Veldhoven | 39,120 |
| Alfa Laval | Industry & Manufacturing | Lund | 15,918 |
| ARM | Business Services | Cambridge | 11,967 |
| Scaleway | Public Sector | Addison | 8,488 |
| Exyte | Construction & Property | Stuttgart | 5,140 |
| Schwarz Digits | Technology | Neckarsulm | 4,578 |
| Bravida | Construction & Property | Stockholm | 4,337 |
| Bull / Eviden USA, Inc. | Technology | Bezons | 3,329 |
The rest of this briefing is in Honch.
Every company in this briefing, with why it matters, how to sell in, the people to reach and the signals live on each one. Ready to filter, add to a campaign or send to your CRM.
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