Bitmain Antminer S21 purchase agreement
Company: Cipher Mining
The claim, verbatim
Agreed to purchase 1.2 EH/s of HASH Super Computing Servers (Antminer S21-200.0T model) for total commitment of $24.0 million ($16.8 million net of coupons)
Source (primary)
Cipher Mining 8-K filed 2023-11-08 (SEC EDGAR, sec_filing)
View cached copy (2026-08-31)Live source ↗
Quote: “the Company entered into an agreement with Bitmain Technologies Delaware Limited to purchase 1.2 EH/s worth of HASH Super Computing Servers (Antminer S21-200.0T model), for a total commitment of $24.0 million to be paid in cash and coupons, or $16.8 million in cash after applying coupons”
How we checked this
Checked on September 18, 2026. The cited source supports every part of this claim.
The filing states the Bitmain purchase, the hardware model, the 1.2 EH/s capacity and both dollar figures exactly as claimed.
Confirmed in the source:
- Cipher agreed to buy 1.2 EH/s of Antminer S21-200.0T HASH Super Computing Servers from Bitmain Technologies Delaware Limited
- The total commitment was $24.0 million, payable in cash and coupons
- The cash cost after applying coupons was $16.8 million
What we did: Read our cached copy of SEC EDGAR (https://www.sec.gov/Archives/edgar/data/1819989/000095017023060676/cifr-20231108.htm) in full (9,266 characters, retrieved August 31, 2026) and checked each assertion in the claim against it.
Additional evidence
confirms Cipher Mining 8-K filed 2023-11-08
Quote: “the Company entered into an agreement with Bitmain Technologies Delaware Limited to purchase 1.2 EH/s worth of HASH Super Computing Servers (Antminer S21-200.0T model), for a total commitment of $24.0 million to be paid in cash and coupons, or $16.8 million in cash after applying coupons”