Bitmain Antminer T21 Miners Purchase (2025 Delivery)
Company: Cipher Mining
What the later record shows
Delivered on time · happened December 31, 2024
The T21 order was upgraded to S21 Pro miners and its delivery was moved earlier. Filings show those machines were delivered in 2024, before the April 2025 date, and that the whole order was delivered.
“accelerated the delivery of the Bitmain Miners from one batch in April 2025 to two batches in September 2024 and October 2024”
2024-06-09 · Cipher Mining 8-K filed 2024-06-10 View cached copy (2026-08-31)Live source ↗
“Approximately $27 million of the Revised Payment Amount will satisfy remaining payment obligations in respect of machines delivered in 2024.”
2025-05-22 · Cipher Mining 424B5 filed 2025-05-23 View cached copy (2026-08-31)Live source ↗
“all of which have been delivered with no remaining amount to be paid”
2025-08-06 · Cipher Mining 10-Q filed 2025-08-07 View cached copy (2026-08-31)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
Cipher Mining agreed to purchase 37,396 Antminer T21 miners from Bitmain for $99,473,360 ($14 per terahash), to be delivered in April 2025
Source (primary)
Cipher Mining 8-K filed 2023-12-18 (SEC EDGAR, sec_filing)
View cached copy (2026-08-31)Live source ↗
Quote: “entered into a fully executed Future Sales and Purchase Agreement (the "Agreement") with Bitmain Technologies Delaware Limited ("Bitmain") to purchase 37,396 Antminer T21 miners (the "2025 Miners"), which will be delivered in one batch in April 2025. The purchase price for the 2025 Miners under the Agreement is $99,473,360, representing a $14/T unit price”
How we checked this
Checked on October 11, 2026. The cited source supports every part of this claim.
The 8-K states that Cipher Mining agreed to buy 37,396 Antminer T21 miners from Bitmain for $99,473,360 at $14/T, for delivery in April 2025. That covers every part of the claim.
Confirmed in the source:
- Cipher Mining, through its wholly-owned subsidiary, agreed to purchase 37,396 Antminer T21 miners
- The seller is Bitmain (Bitmain Technologies Delaware Limited)
- The purchase price for these miners is $99,473,360
- The price represents a $14/T (per terahash) unit price
- The miners will be delivered in one batch in April 2025
What we did: Read our cached copy of SEC EDGAR (https://www.sec.gov/Archives/edgar/data/1819989/000095017023070948/cifr-20231216.htm) in full (5,221 characters, retrieved August 31, 2026) and checked each assertion in the claim against it.
Additional evidence
confirms Cipher Mining 8-K filed 2023-12-18
Quote: “entered into a fully executed Future Sales and Purchase Agreement (the "Agreement") with Bitmain Technologies Delaware Limited ("Bitmain") to purchase 37,396 Antminer T21 miners (the "2025 Miners"), which will be delivered in one batch in April 2025. The purchase price for the 2025 Miners under the Agreement is $99,473,360, representing a $14/T unit price”
confirms Cipher Mining 8-K filed 2024-06-10
Quote: “accelerated the delivery of the Bitmain Miners from one batch in April 2025 to two batches in September 2024 and October 2024”
confirms Cipher Mining 424B5 filed 2025-05-23
Quote: “Approximately $27 million of the Revised Payment Amount will satisfy remaining payment obligations in respect of machines delivered in 2024.”
confirms Cipher Mining 10-Q filed 2025-08-07
Quote: “all of which have been delivered with no remaining amount to be paid”