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Cartis diligence evidence schedule

xAI Colossus 1

PRJ-XAI-COLOSSUS-1 · Site · Southwest Memphis, Shelby County, Tennessee, United States

Record last updated Oct 28, 2026

Scope and capacity

Colossus 1 is the original xAI supercomputer in the former Electrolux factory on Paul R. Lowry Road in southwest Memphis. The company reported a 100,000-GPU cluster in December 2024 and an expansion to 200,000 GPUs in February 2025. On May 6, 2026, the operator described more than 220,000 NVIDIA GPUs, including H100, H200 and GB200 accelerators. Anthropic announced an agreement to use all of the facility’s compute capacity, describing access to more than 300 MW within that month. That commercial compute-access figure is distinct from measured operating IT load. MLGW’s May 5, 2025 update documented 150 MW of grid service and a separate request for another 150 MW. The original facility is separate from the Tulane Road Colossus 2 development and the Southaven facilities. Phoenix Investors reported in March 2025 that the former factory had been leased to xAI. SELC reported that an appeal filed in July 2025 over the original site’s air permit was dismissed as moot in December 2025. Present grid availability, metered water use and the current cooling configuration are not established by these dated disclosures. May 29, 2026 SEC correspondence describes the Anthropic compute agreement across both Colossus and Colossus II; its combined commercial value is not an original-site financing amount.

Headline: Not established in published records

Numbers refer to their stated physical boundaries and are not added together. Source dates, claim dates and record updates have different meanings. Missing dates and locators are not inferred.

Claims and exhibit sources

Jump to a claim (17)

Initial GPU count · 100,000 NVIDIA Hopper GPUs

Actual company reported · xAI Colossus 1 (Project)

Claim AST-B1-014 · Recorded claim type: Actual company reported · Review: Approved · Claim date: Dec 23, 2024

  1. xAI raises $6B Series C

    xAI · Document date: Dec 23, 2024 · Supports

    Source reference: COL-02 · Company primary

    Source URL

    https://x.ai/news/series-c

GPU count reported for February 2025 · 200,000 NVIDIA GPUs

Historical company report · xAI Colossus 1 (Project)

Claim AST-B1-015 · Recorded claim type: Historical company report · Review: Approved · Claim date: Not stated

  1. Colossus: The World's Largest AI Supercomputer

    xAI · Document date: Not stated · Supports

    Source reference: COL-01 · Company primary

    Source URL

    https://x.ai/colossus

Initial build duration · 122 days

Actual company reported · xAI Colossus 1 (Project)

Claim AST-B1-016 · Recorded claim type: Actual company reported · Review: Approved · Claim date: Dec 23, 2024

  1. xAI raises $6B Series C

    xAI · Document date: Dec 23, 2024 · Supports

    Source reference: COL-02 · Company primary

    Source URL

    https://x.ai/news/series-c

Doubling duration · 92 days

Actual company reported · xAI Colossus 1 (Project)

Claim AST-B1-017 · Recorded claim type: Actual company reported · Review: Approved · Claim date: Not stated

  1. Colossus: The World's Largest AI Supercomputer

    xAI · Document date: Not stated · Supports

    Source reference: COL-01 · Company primary

    Source URL

    https://x.ai/colossus

Grid power service documented May 2025 · 150 MW grid service documented in the May 5, 2025 utility update historical disclosure

Historical utility service; not a verified current supply total · xAI Colossus 1 (Project)

Claim AST-B1-019 · Recorded claim type: Historical utility service; not a verified current supply total · Review: Approved · Claim date: May 5, 2025

  1. MLGW update regarding utility support for xAI

    Memphis Light, Gas and Water · Document date: May 5, 2025 · Supports

    Source reference: COL-R20261027-MLGW · Utility primary

    Source URL

    https://www.mlgw.com/images/content/files/pdf/new/5-5-25%20xAI%20Update.pdf

Water service provision documented in 2024 · Up to 1000000 gallons/day

Utility service provision · xAI Colossus 1 (Project)

Claim AST-B1-021 · Recorded claim type: Utility service provision · Review: Approved · Claim date: Not stated

  1. xAI and MLGW Quick Facts

    Memphis Light, Gas and Water · Document date: Not stated · Supports

    Source reference: COL-03 · Utility primary

    Source URL

    https://www.mlgw.com/images/content/files/pdf/2024xAI%20and%20MLGW%20Quick%20Facts%201.pdf

Gas turbines covered by July 2025 permit · 15 gas turbines

Permit issuance reported by SELC · xAI Colossus 1 (Project)

Claim AST-B1-022 · Recorded claim type: Permit issuance reported by SELC · Review: Approved · Claim date: Jul 2, 2025

  1. Memphis health leaders grant air permit for xAI

    Southern Environmental Law Center · Document date: Jul 2, 2025 · Supports

    Source reference: COL-05 · Advocacy secondary

    Source URL

    https://www.selc.org/press-release/memphis-health-leaders-grant-air-permit-for-xai-data-center/

GPU count reported May 2026 · More than 220000 NVIDIA GPUs

Company reported · xAI Colossus 1 (Project)

Claim AST-REFRESH-COL1-20261027-GPU · Recorded claim type: Company reported · Review: Approved · Claim date: May 6, 2026

  1. New Compute Partnership with Anthropic

    SpaceXSI (x.ai) · Document date: May 6, 2026 · Supports

    Source reference: COL-R20261027-OPERATOR · Company primary

    Source URL

    https://x.ai/news/anthropic-compute-partnership

Anthropic compute access agreement · All Colossus 1 compute capacity scope

Announced agreement · xAI Colossus 1 (Project)

Claim AST-REFRESH-COL1-20261027-CUSTOMER · Recorded claim type: Announced agreement · Review: Approved · Claim date: May 6, 2026

  1. Higher usage limits for Claude and a compute deal with SpaceX

    Anthropic · Document date: May 6, 2026 · Supports

    Source reference: COL-R20261027-ANTHROPIC · Customer primary

    Source URL

    https://www.anthropic.com/news/higher-limits-spacex

  2. New Compute Partnership with Anthropic

    SpaceXSI (x.ai) · Document date: May 6, 2026 · Supports

    Source reference: COL-R20261027-OPERATOR · Company primary

    Source URL

    https://x.ai/news/anthropic-compute-partnership

Compute access agreement announced May 2026 · More than 300 MW

Announced transaction scope; not measured operating IT load · xAI Colossus 1 (Project)

Claim AST-REFRESH-COL1-20261027-ACCESS · Recorded claim type: Announced transaction scope; not measured operating IT load · Review: Approved · Claim date: May 6, 2026

Headline treatment: Commercial transaction scope; not operating IT load

  1. Higher usage limits for Claude and a compute deal with SpaceX

    Anthropic · Document date: May 6, 2026 · Supports

    Source reference: COL-R20261027-ANTHROPIC · Customer primary

    Source URL

    https://www.anthropic.com/news/higher-limits-spacex

Cluster Ethernet platform reported December 2024 · NVIDIA Spectrum-X platform

Company reported · xAI Colossus 1 (Project)

Claim AST-REFRESH-COL1-20261027-NETWORK · Recorded claim type: Company reported · Review: Approved · Claim date: Dec 23, 2024

  1. xAI raises $6B Series C

    xAI · Document date: Dec 23, 2024 · Supports

    Source reference: COL-02 · Company primary

    Source URL

    https://x.ai/news/series-c

Leasehold history reported March 2025 · Phoenix Investors reported the former Electrolux property at 3231 Paul R. Lowry Road leased to xAI scope

Dated landlord hosted report; current fee title not established · xAI Colossus 1 (Project)

Claim AST-REFRESH-COL1-20261027-LEASE · Recorded claim type: Dated landlord hosted report; current fee title not established · Review: Approved · Claim date: Mar 26, 2025

  1. Former Electrolux Facility to House One of the World’s Largest Supercomputers

    Phoenix Investors · Document date: Mar 26, 2025 · Supports

    Source reference: COL-R20261027-PHOENIX · Landlord hosted report

    Source URL

    https://phoenixinvestors.com/acquisitions-updates/former-electrolux-facility-to-house-one-of-the-worlds-largest-supercomputers/

Water service documented May 2025 · Connected to an existing 20-inch water main connection

Historical utility disclosure; not metered water consumption · xAI Colossus 1 (Project)

Claim AST-REFRESH-COL1-20261027-WATERMAIN · Recorded claim type: Historical utility disclosure; not metered water consumption · Review: Approved · Claim date: May 5, 2025

  1. MLGW update regarding utility support for xAI

    Memphis Light, Gas and Water · Document date: May 5, 2025 · Supports

    Source reference: COL-R20261027-MLGW · Utility primary

    Source URL

    https://www.mlgw.com/images/content/files/pdf/new/5-5-25%20xAI%20Update.pdf

Natural gas service documented May 2025 · Existing 16-inch main with an 8-inch service tap connection

Historical utility disclosure · xAI Colossus 1 (Project)

Claim AST-REFRESH-COL1-20261027-GAS · Recorded claim type: Historical utility disclosure · Review: Approved · Claim date: May 5, 2025

  1. MLGW update regarding utility support for xAI

    Memphis Light, Gas and Water · Document date: May 5, 2025 · Supports

    Source reference: COL-R20261027-MLGW · Utility primary

    Source URL

    https://www.mlgw.com/images/content/files/pdf/new/5-5-25%20xAI%20Update.pdf

Cooling method in undated operator description · Internal closed loop cooling described by the operator system

Undated company description; current configuration unverified · xAI Colossus 1 (Project)

Claim AST-REFRESH-COL1-20261027-COOLING · Recorded claim type: Undated company description; current configuration unverified · Review: Approved · Claim date: Not stated

  1. Memphis Information Center

    SpaceXSI (x.ai) · Document date: Not stated · Supports

    Source reference: COL-R20261027-FAQ · Company primary

    Source URL

    https://x.ai/memphis/info

Anthropic agreement scope in May 2026 SEC correspondence · Combined Colossus and Colossus II compute services scope

Multi site commercial disclosure; no original site value allocation · xAI Colossus 1 (Project)

Claim AST-REFRESH-COL1-20261027-COMMERCIAL-SCOPE · Recorded claim type: Multi site commercial disclosure; no original site value allocation · Review: Approved · Claim date: May 29, 2026

  1. Space Exploration Technologies Corp. S-1 review correspondence

    U.S. Securities and Exchange Commission · Document date: May 29, 2026 · Supports

    Source reference: COL-R20261027-SEC · Official correspondence

    Source URL

    https://www.sec.gov/Archives/edgar/data/1181412/000000000026005505/filename1.pdf

Counterparties and capital

xAI · Developer and operator

NVIDIA · GPU and network platform supplier · CMP-0010

Memphis Light Gas and Water · Retail electric and water utility

Tennessee Valley Authority · Wholesale power supplier · CMP-0674

Shelby County Health Department · Air permitting authority

Anthropic · Contracted compute customer announced May 2026 · CMP-1370

Phoenix Investors · Landlord reported March 2025

This schedule captures public Cartis research. It is not a title, lien or legal-opinion report. Document page/section locators and claim review timestamps are included only when published; this version has no separate locator or claim-review-time feed.