Black Pearl and Barber Lake initial capacity delivery
Company: Cipher Mining - Project: Barber Lake Facility
What the later record shows
The date slipped · new target December 31, 2026
The September 2026 8-K moved Barber Lake to a new schedule: data halls delivered from Q4 2026 to Q1 2027, with first rent commencement in Q4 2026. No passage gives Black Pearl's status.
“an updated phased delivery schedule for the Barber Lake Facility, 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 ↗
“Rent will commence for each data hall as it is delivered, with the first rent commencement expected to occur during the fourth quarter of 2026.”
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
Black Pearl and Barber Lake construction projects are on schedule to deliver initial capacity in September 2026
Source (primary)
cipher-mining 8-K exhibit (dp248110_ex9901.htm) (SEC EDGAR (8-K Ex), press_release)
View cached copy (2026-09-06)Live source ↗
Quote: “Black Pearl and Barber Lake construction projects are both on schedule and tracking towards delivery of the initial capacity in September 2026”
How we checked this
Checked on October 11, 2026. The cited source supports every part of this claim.
The June 2026 investor presentation states that the Black Pearl and Barber Lake construction projects are both on schedule and tracking towards delivery of initial capacity in September 2026, matching the claim.
Confirmed in the source:
- Cipher's Black Pearl and Barber Lake data center construction projects were described as on schedule as of the June 2026 presentation
- Both projects were described as tracking toward delivery of initial capacity in September 2026
What we did: Read our cached copy of SEC EDGAR (8-K Ex) (https://www.sec.gov/Archives/edgar/data/1819989/000095010326008635/dp248110_ex9901.htm) in full (11,439 characters, retrieved September 6, 2026) and checked each assertion in the claim against it.
Additional evidence
confirms cipher-mining 8-K exhibit (dp248110_ex9901.htm)
Quote: “Black Pearl and Barber Lake construction projects are both on schedule and tracking towards delivery of the initial capacity in September 2026”
delays Cipher Mining 8-K filed 2026-09-25
Quote: “an updated phased delivery schedule for the Barber Lake Facility, with individual data halls now expected to be delivered between the fourth quarter of 2026 and the first quarter of 2027”