Company: CIFRW
Filing Date: 2025-03-03
Form Type: S-3ASR
Source: 0001193125-25-044253
Chunk: 1

Company: Cipher Mining Inc.
Filing Date: 2025-03-03
Form: S-3ASR
Chunk 1
---
 pursuant to Rule 462(e) under the Securities Act, check the following box. ☒ If this Form is a post-effective amendment to a registration statement filed pursuant to General Instruction I.D. filed to register additional securities or additional classes of securities pursuant to Rule 413(b) under the Securities Act, check the following box. ☐ Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-acceleratedfiler, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2of the Exchange Act.

| Large accelerated filer |     | ☒ |     | Accelerated filer         |     | ☐ |
| Non-accelerated filer   |     | ☐ |     | Smaller reporting company |     | ☐ |
|                         |     |   |     | Emerging growth company   |     | ☐ |

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act. ☐

PROSPECTUS

Cipher Mining Inc.

10,438,413 Shares

Common Stock

Offered by the Selling Securityholder

This prospectus relates to the proposed resale or other disposition of up to an aggregate of 10,438,413 shares of common stock, par value $0.001 per share, of
Cipher Mining, Inc. (the “common stock”) by the selling securityholder identified in this prospectus (“Selling Securityholder”). We are not selling any shares of our common stock under this prospectus and will not receive any
proceeds from the sale or other disposition of our common stock by the Selling Securityholder.

The Selling Securityholder may offer and sell or otherwise
dispose of the shares of common stock described in this prospectus from time to time through public or private transactions at prevailing market prices, at prices related to prevailing market prices or at privately negotiated prices. The shares of
common stock offered by this prospectus may be offered by the Selling Securityholder directly to purchasers or to or through brokers or dealers or other agents. The Selling Securityholder will bear all costs, commissions and discounts, if any,
attributable to the sales of shares.