Company: CIFRW
Filing Date: 2025-05-23
Form Type: 424B5
Source: 0001193125-25-125868
Chunk: 80

Company: Cipher Mining Inc.
Filing Date: 2025-05-23
Form: 424B5
Chunk 80
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 their respective operations.

31

PLAN OF DISTRIBUTION We may sell the offered securities from time to time:

| • |     | through underwriters or dealers; |

| • |     | through agents; |

| • |     | directly to one or more purchasers; or |

| • |     | through a combination of any of these methods of sale. |

We will identify the specific plan of distribution, including any underwriters, dealers, agents or direct purchasers and their compensation in the applicable prospectus supplement. 32

LEGAL MATTERS

Latham & Watkins LLP will pass upon certain legal matters relating to the issuance and sale of the securities offered hereby on behalf of Cipher
Mining Inc. Additional legal matters may be passed upon for us or any underwriters, dealers or agents, by counsel that we will name in the applicable prospectus supplement.

EXPERTS

The
consolidated financial statements for Cipher Mining Inc., appearing in Cipher Mining Inc’s Annual Report (Form 10-K) for the year ended December 31, 2023, have been audited by Marcum LLP, an
independent registered public accounting firm, as stated in their report, which is incorporated herein by reference. Such financial statements have been so incorporated in reliance upon the report of such firm given upon their authority as experts
in accounting and auditing.

33

17,540,000 Shares

Common Stock

PROSPECTUS SUPPLEMENT

May 20, 2025

Morgan Stanley