Barber Lake facility commencement
Company: Cipher Mining - Project: Barber Lake Facility
What the later record shows
The date slipped · new target December 31, 2026
The September 24, 2026 8-K set a new phased schedule. Data halls are now to be delivered between Q4 2026 and Q1 2027, so operations did not begin on 9/30/2026. The first halls are now expected in Q4 2026.
“with individual data halls now expected to be delivered between the fourth quarter of 2026 and the first quarter of 2027”
2026-09-24 · Cipher Mining 8-K filed 2026-09-25 View cached copy (2026-09-26)Live source ↗
Checked October 10, 2026 against filings, releases and reporting published after the claim was made. Quotes are verbatim from the linked documents.
The claim, verbatim
Barber Lake facility is scheduled to commence operations on September 30, 2026
Source (primary)
cipher-mining 8-K exhibit (dp236870_ex9901.htm) (SEC EDGAR (8-K Ex), press_release)
View cached copy (2026-09-27)Live source ↗
Quote: “Barber Lake Commencement Date on 9/30/2026”
How we checked this
Checked on October 12, 2026. The cited source supports part of this claim, but not all of it.
The presentation lists 9/30/2026 as the Barber Lake Commencement Date, but only as a key model assumption, and it links that date to lease commencement. It does not state that the facility is scheduled to begin operations on that date.
Confirmed in the source:
- Cipher's financing model assumes a Barber Lake Commencement Date of September 30, 2026
We could not confirm this from the cited source:
- The September 30, 2026 date is a firm schedule; the document lists it only as an illustrative model assumption, with amounts and timing subject to change
- The commencement refers to the start of facility operations; the document ties the commencement date to lease commencement, when debt and backstop amortization begin
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/1819989/000095010325014194/dp236870_ex9901.htm) in full (12,063 characters, retrieved September 27, 2026) and checked each assertion in the claim against it.
Additional evidence
confirms cipher-mining 8-K exhibit (dp236870_ex9901.htm)
Quote: “Barber Lake Commencement Date on 9/30/2026”
delays Cipher Mining 8-K filed 2026-09-25
Quote: “with individual data halls now expected to be delivered between the fourth quarter of 2026 and the first quarter of 2027”