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IREN Sweetwater 1 Data Center Campus

PRJ-0718 · Site · Sweetwater area, Texas, United States

Record last updated Oct 28, 2026

Scope and capacity

IREN’s September 8, 2026 update said Sweetwater 1 was conditionally classified as Base Load and described its first 300 MW gross data-center development as under construction for delivery in the fourth quarter of 2027. The classification remains conditional; neither it nor the energized bulk substation proves operating AI IT capacity. IREN is developing Sweetwater 1 as the larger anchor of its West Texas AI and compute hub. The 1.4 GW figure is the site power envelope; it is not operating critical IT capacity. IREN is publicly identified in the project record for Sweetwater area, Nolan County area, TX, US. The disclosed development record includes 1,400 MW grid-connected power envelope; more than 1,300 acres across the Sweetwater hub; bulk substation energized in 2026. Power and infrastructure include 345 kV/138 kV bulk substation, primary substations and planned fiber loop to Sweetwater 2. IREN identifies 1,400 MW of secured grid capacity at Sweetwater 1; site delivery remains phased.

Headline: 1,400 MW Utility capacity

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.

Location context · Sweetwater 1 campus | approximately 40 miles from Abilene | West Texas

Actual · IREN Sweetwater 1 Data Center Campus (Project)

Claim 58719 · Recorded claim type: Actual · Review: Approved · Claim date: Not stated

  1. IREN annual report — Sweetwater development portfolio

    IREN · Document date: Aug 29, 2025 · Primary

    Source reference: SRC-3208 · Fact sheet · Recorded authority: Official primary

    Source URL

    https://www.sec.gov/Archives/edgar/data/1878848/000187884825000063/iren-20250630.htm

Lifecycle status · Construction

Actual · IREN Sweetwater 1 Data Center Campus (Project)

Claim 58720 · Recorded claim type: Actual · Review: Approved · Claim date: Not stated

  1. IREN annual report — Sweetwater development portfolio

    IREN · Document date: Aug 29, 2025 · Primary

    Source reference: SRC-3208 · Fact sheet · Recorded authority: Official primary

    Source URL

    https://www.sec.gov/Archives/edgar/data/1878848/000187884825000063/iren-20250630.htm

Reported capacity · 1,400 MW

Design · IREN Sweetwater 1 Data Center Campus (Project)

Claim 58721 · Recorded claim type: Design · Review: Approved · Claim date: Not stated

Headline treatment: Selected headline

  1. IREN annual report — Sweetwater development portfolio

    IREN · Document date: Aug 29, 2025 · Primary

    Source reference: SRC-3208 · Fact sheet · Recorded authority: Official primary

    Source URL

    https://www.sec.gov/Archives/edgar/data/1878848/000187884825000063/iren-20250630.htm

Capacity basis · IREN identifies 1,400 MW of secured grid capacity at Sweetwater 1; site delivery remains phased.

Actual · IREN Sweetwater 1 Data Center Campus (Project)

Claim 58722 · Recorded claim type: Actual · Review: Approved · Claim date: Not stated

  1. IREN annual report — Sweetwater development portfolio

    IREN · Document date: Aug 29, 2025 · Primary

    Source reference: SRC-3208 · Fact sheet · Recorded authority: Official primary

    Source URL

    https://www.sec.gov/Archives/edgar/data/1878848/000187884825000063/iren-20250630.htm

Development scale · 1,400 MW grid connected power envelope

Actual · IREN Sweetwater 1 Data Center Campus (Project)

Claim 107512 · Recorded claim type: Actual · Review: Approved · Claim date: Not stated

  1. Sweetwater data center hub profile

    IREN · Document date: Apr 1, 2026 · Corroborating

    Source reference: SRC-5986 · Fact sheet · Recorded authority: Official primary

    Source URL

    https://iren.com/data-centers/sweetwater

  2. IREN annual report — Sweetwater development portfolio

    IREN · Document date: Aug 29, 2025 · Primary

    Source reference: SRC-3208 · Fact sheet · Recorded authority: Official primary

    Source URL

    https://www.sec.gov/Archives/edgar/data/1878848/000187884825000063/iren-20250630.htm

Development milestone · More than 1,300 acres across the Sweetwater hub

Actual · IREN Sweetwater 1 Data Center Campus (Project)

Claim 107513 · Recorded claim type: Actual · Review: Approved · Claim date: Not stated

  1. Sweetwater data center hub profile

    IREN · Document date: Apr 1, 2026 · Corroborating

    Source reference: SRC-5986 · Fact sheet · Recorded authority: Official primary

    Source URL

    https://iren.com/data-centers/sweetwater

  2. IREN annual report — Sweetwater development portfolio

    IREN · Document date: Aug 29, 2025 · Primary

    Source reference: SRC-3208 · Fact sheet · Recorded authority: Official primary

    Source URL

    https://www.sec.gov/Archives/edgar/data/1878848/000187884825000063/iren-20250630.htm

Power arrangement · Bulk substation energized in 2026.

Actual · IREN Sweetwater 1 Data Center Campus (Project)

Claim 107514 · Recorded claim type: Actual · Review: Approved · Claim date: Not stated

  1. Sweetwater data center hub profile

    IREN · Document date: Apr 1, 2026 · Corroborating

    Source reference: SRC-5986 · Fact sheet · Recorded authority: Official primary

    Source URL

    https://iren.com/data-centers/sweetwater

  2. IREN annual report — Sweetwater development portfolio

    IREN · Document date: Aug 29, 2025 · Primary

    Source reference: SRC-3208 · Fact sheet · Recorded authority: Official primary

    Source URL

    https://www.sec.gov/Archives/edgar/data/1878848/000187884825000063/iren-20250630.htm

Boundary context · Sweetwater 1 campus | approximately 40 miles from Abilene | West Texas

Actual · IREN Sweetwater 1 Data Center Campus (Project)

Claim 107515 · Recorded claim type: Actual · Review: Approved · Claim date: Not stated

  1. Sweetwater data center hub profile

    IREN · Document date: Apr 1, 2026 · Corroborating

    Source reference: SRC-5986 · Fact sheet · Recorded authority: Official primary

    Source URL

    https://iren.com/data-centers/sweetwater

  2. IREN annual report — Sweetwater development portfolio

    IREN · Document date: Aug 29, 2025 · Primary

    Source reference: SRC-3208 · Fact sheet · Recorded authority: Official primary

    Source URL

    https://www.sec.gov/Archives/edgar/data/1878848/000187884825000063/iren-20250630.htm

Counterparties and capital

IREN · Developer · CMP-1436

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.