Company: CIFRW
Filing Date: 2025-05-22
Form Type: 424B5
Source: 0001193125-25-124285
Chunk: 34

Company: Cipher Mining Inc.
Filing Date: 2025-05-22
Form: 424B5
Chunk 34
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 (or, if no interest has been paid or duly provided for, from, and including, the date the notes are initially issued) to, but excluding, the next interest payment date. Interest will be computed on the basis of a 360-dayyear comprised of twelve 30-daymonths. In addition to the stated interest on the notes referred to above, special interest will accrue on the notes in the circumstances described below under the caption “—Events of Default—Special Interest as Sole Remedy for Certain Reporting Defaults.” All references in this prospectus supplement to interest on the notes include any special interest and default interest (as described below under the caption “—Events of Default—Default Interest”) payable on the notes, unless the context requires otherwise. If the first date on which any special interest begins to accrue on any global note is on or after the fifth business day before a regular record date and before the next interest payment date, then, notwithstanding anything to the contrary, the amount thereof accruing in respect of the period from, and including, such first date to, but excluding, such interest payment date will not be payable on such interest payment date but will instead be deemed to accrue (without duplication) entirely on such interest payment date (and, for the avoidance of doubt, no interest will accrue as a result of the related delay). Ranking The notes will be our senior, unsecured obligations and will be:

| • |     | equal in right of payment with our existing and future senior, unsecured indebtedness; |

| • |     | senior in right of payment to our existing and future indebtedness that is expressly subordinated to the notes; |

| • |     | effectively subordinated to our existing and future secured indebtedness, to the extent of the value of the 
 collateral securing that indebtedness; and                                                                  |

| • |     | structurally subordinated to all existing and future indebtedness and other liabilities, including trade 
 payables, and (to the extent we are not a holder thereof) preferred equity, if any, of our subsidiaries. |

The indenture will not prohibit us from incurring additional indebtedness, including secured indebtedness, which would be effectively senior to the notes to the extent of the value of the collateral securing that indebtedness, or indebtedness that would rank equal in right of payment with the notes. The indenture will also not prohibit our subsidiaries from incurring any additional indebtedness or other liabilities that would be structurally senior to our obligations under the notes. In the