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Scrutica
Record to May 15, 2026

Microsoft Fairwater Wisconsin

TypeAI TrainingStatusOperationalWhereMount Pleasant, Wisconsin, USIndexed fromEpoch AI Frontier Data Centers

Operational; Microsoft Corporation is recorded as owning the AI hardware inside this site

Description quoted from Epoch AI Frontier Data Centers

Microsoft Fairwater Wisconsin is set to be the tech giant’s most powerful data center yet. The buildings have a two-story structure, with GPU racks networked vertically as well as horizontally. Each of these GPU buildings is paired with a one-story building dedicated to data storage and processing using CPUs. We estimated compute capacity based on disclosures from Microsoft, and permit applications showing the layout of server racks. Data on Building 3 and 4 is more uncertain, as it is based on the relative sizing of the buildings and mechanical areas in architectural drawings (see this calculation).

Source: Epoch AI Frontier Data Centers, CC BY 4.0

1/3site roles identified2 site relationships1 finding in the company chain0 export-control designationsFurthest finding: company at site

Date in site records: May 15, 2026. Site data: Epoch AI Frontier Data Centers.

Ownership and operation

Plate I. Site owner, operator and hardware ownerscrutica.com · data to May 15, 2026

AI hardware owner · per catalog

Microsoft Corporation parent ownership unresolved 1 finding

Which organisation owns the AI hardware inside it?

Microsoft Fairwater WisconsinSite

AI hardware owner · per catalog Microsoft Corporation. Epoch AI's field for who owns the AI hardware, which it defines as not necessarily the owner or operator of the facility. source

Companies are grouped by their role at the site, with recorded parents above them. No parent companies were found in the ownership data. Further ownership remains unresolved where labelled. Record source: Epoch AI Frontier Data Centers; authority tier 2. Each role is drawn only as the relationship its own source establishes, listed above; none implies exclusive control of the full site. Ticks count the export-control and government-link findings for each company.
Plate II. Organisations recorded at the sitescrutica.com · data to May 15, 2026

Uses the compute (source marks likely)

OpenAIinferred

Named in Epoch AI's field for labs using the compute; it records use, not a lease.

Epoch AI Frontier Data Centers source

Power provider

We Energies

Named in Epoch AI's field for companies involved in providing power to the site.

Epoch AI Frontier Data Centers source

Two relationships are recorded at Microsoft Fairwater Wisconsin, under two labels: “Uses the compute (source marks likely)” and “Power provider”. One of two is marked inferred: the relationship itself was derived from other records.

Export controls and government links

No export-control designations were found in the checked company chains.

Plate III. Export controls and government linksscrutica.com · data to May 15, 2026
site1A company in the ownership chain is headquartered in the United Statescompany levels
Company at site

Headquarters jurisdiction
A company in the ownership chain is headquartered in the United States

United States: Operates the Export Administration Regulations (EAR) and the BIS Entity List under 15 CFR 730–774; deemed-export rules extend reach to foreign nationals on US soil. Export-control regimes listed for this jurisdiction: Wassenaar Arrangement, US EAR (BIS Entity List authority).

Country is the recorded headquarters location.Linked through the company recorded as owning the AI hardware inside this site.

Triangle: export-control designation or regulatory flag. Square: sovereign capital linkage. Circle: headquarters jurisdiction. Level 1 is a company at the site; higher levels are its parents. 1 finding is recorded; 0 are export-control designations.

Capacity

Reading. Power and acceleratorsscrutica.com · data to May 15, 2026
442 MW

Facility power

Estimated.

369 MW

Power for IT equipment

Estimated.

not recorded

Accelerators

An estimated 445,679 H100-equivalent.

Power comparison

442 MW is at the 98th percentile among the 310 operating AI Training records with a reported power figure. These represent 84% of the 369 operating AI Training records tracked; announced, under-construction and campus build-out figures are not ranked. The scale ends at the largest operating figure in this group, 1,276 MW.

Methods and sources

Ownership roles

Title identifies the legal owner of the site; operation identifies who runs it. AI-hardware ownership follows the catalog’s attribution of the machines inside, whose owner may lease the facility.

Each role requires its own attribution. An operator named in a source supplies evidence of operation only.

Parent companies

Ownership checks start with each company named at the site and follow recorded parent relationships. A company holding several roles is checked once. Its linked company page lists the relationships and their sources; further parents may remain undocumented.

Level 1 identifies a company at the site, level 2 its parent, and each further level another parent. Export-control designations and government investments are assigned to the company concerned.

Missing values

Unrecorded roles remain blank. Findings whose company position is unresolved stay in the list with that position labelled unknown.

Publication limits

Subscription corporate data helps identify parent relationships and sovereign investments. Publication is limited to relationship classes and supporting public sources; licensed records, identifiers and values are withheld.

Epoch AI estimates capacity using satellite imagery, permits and corporate disclosures. Its catalog is the source for this site record.

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