Horizon 1 Microsoft handoff
Company: IREN - Project: Horizon
What the later record shows
Delivered on time · happened August 13, 2026
Horizon 1 was delivered to and accepted by Microsoft on August 13, 2026, within the promised Q3 2026 window. Note that the passages describe Horizon 1 as 50MW (IT load), not the 300 MW stated in the claim.
“today announced that Horizon 1 has been delivered to and accepted by Microsoft, and that IREN has achieved NVIDIA Exemplar Cloud status”
2026-08-12 · iren 8-K exhibit (ef20080141_ex99-1.htm) View cached copy (2026-08-30)Live source ↗
“Horizon 1 is the first of four 50MW direct-to-chip liquid-cooled AI Cloud deployments that IREN is scheduled to deliver to Microsoft in 2026.”
2026-08-13 · IREN Stock Jumps 10% After Microsoft, NVIDIA AI Infrastructure Wins - The Crypto Times View cached copy (2026-08-31)Live source ↗
“Horizon 1 was delivered to, and accepted by, Microsoft in August 2026.”
2026-08-26 · IREN 10-K filed 2026-08-27 View cached copy (2026-08-30)Live source ↗
Checked October 9, 2026 against filings, releases and reporting published after the claim was made. Quotes are verbatim from the linked documents.
The claim, verbatim
Horizon 1 (300 MW liquid-cooled deployment at Childress with NVIDIA GB300 NVL72 installations) scheduled for Microsoft handoff in Q3 2026
Source (primary)
iren 8-K exhibit (irentranscript.htm) (SEC EDGAR (8-K Ex), press_release)
View cached copy (2026-09-07)Live source ↗
Quote: “Horizon 1 is scheduled for Microsoft handoff in Q3”
How we checked this
Checked on October 10, 2026. The cited source supports part of this claim, but not all of it.
The transcript confirms the Q3 Microsoft handoff and the liquid-cooled GB300 NVL72 build at Childress. However, it describes 300 MW as the total for Horizons 1 through 4, not for Horizon 1 alone.
Confirmed in the source:
- Horizon 1 is scheduled for handoff to Microsoft in Q3 (2026)
- Horizon 1 is part of a liquid-cooled deployment at Childress
- NVIDIA GB300 NVL72 installations are underway at the Childress liquid-cooled deployment
We could not confirm this from the cited source:
- Horizon 1 on its own is a 300 MW deployment; the transcript gives 300 MW as the combined size of Horizons 1 to 4
That does not mean it is false — only that this source does not establish it, as of the date above. If we find a source that settles it, we will re-check and update this page.
What we did: Read our cached copy of SEC EDGAR (8-K Ex) (https://www.sec.gov/Archives/edgar/data/1878848/000187884826000028/irentranscript.htm) in full (50,400 characters, retrieved September 7, 2026) and checked each assertion in the claim against it.
Additional evidence
confirms iren 8-K exhibit (irentranscript.htm)
Quote: “Horizon 1 is scheduled for Microsoft handoff in Q3”
confirms IREN 10-K filed 2026-08-27
Quote: “Horizon 1 was delivered to, and accepted by, Microsoft in August 2026.”
confirms iren 8-K exhibit (ef20080141_ex99-1.htm)
Quote: “today announced that Horizon 1 has been delivered to and accepted by Microsoft, and that IREN has achieved NVIDIA Exemplar Cloud status”
confirms IREN Stock Jumps 10% After Microsoft, NVIDIA AI Infrastructure Wins - The Crypto Times
Quote: “Horizon 1 is the first of four 50MW direct-to-chip liquid-cooled AI Cloud deployments that IREN is scheduled to deliver to Microsoft in 2026.”