Company: CIFRW
Filing Date: 2025-03-03
Form Type: S-3ASR
Source: 0001193125-25-044253
Chunk: 18

Company: Cipher Mining Inc.
Filing Date: 2025-03-03
Form: S-3ASR
Chunk 18
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 of our securities that the Selling Securityholder will hold upon consummation of any such sales. In addition, since the date on which the Selling Securityholder provided this information to us, the Selling Securityholder may have sold,
transferred or otherwise disposed of all or a portion of its securities. Any changed or new information given to us by the Selling Securityholder, including regarding the identity of, and the securities held by, the Selling Securityholder, will be
set forth in a prospectus supplement or amendments to the registration statement of which this prospectus is a part, if and when necessary. The Selling Securityholder may sell all, some or none of such securities in this offering. See “Plan of Distribution.”

Percentage of beneficial ownership is based on 367,628,831 shares of our common stock outstanding as of March 3, 2025. In
computing the number of shares beneficially owned by an individual or entity and the percentage ownership of that person, shares of common stock subject to options, warrants or other rights held by such person that are currently exercisable or that
will become exercisable or will otherwise vest within 60 days of March 3, 2025 are considered outstanding, although these shares are not considered outstanding for purposes of computing the percentage ownership of any other person. The Selling
Securityholder listed has sole voting and investment power with respect to the shares beneficially owned by the Selling Securityholder unless noted otherwise.

13

|                             |     | Shares of Common Stock |            |     |      |     |     |              |            |     |              |   |     |   |   |
| Name of Selling Stockholder |     | Number                 
 Beneficially           
 Owned Prior            
 to the Offering        |            |     | %(*) |     |     | Number Being 
 Registered   
 Hereby       |            |     | Number       
 Beneficially 
 Owned After  
 the Offering |   |     | % |   |
| Star Beacon LLC(1)          |     |                        | 10,438,413 |     |      | 2.8 |     |              | 10,438,413 |     |              | — |     |   | — |

| (*) | The amounts set forth in this column are the number of shares of common stock that may be offered by such                                                                            
 Selling Securityholder using this prospectus. These amounts do not represent any other shares of our common stock that the Selling Securityholder may own beneficially or otherwise. |

| (1