Company: CIFRW
Filing Date: 2025-05-22
Form Type: 424B5
Source: 0001193125-25-124285
Chunk: 55

Company: Cipher Mining Inc.
Filing Date: 2025-05-22
Form: 424B5
Chunk 55
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 our common stock under any such plan; |

| • |     | the issuance of any shares of our common stock or options or rights to purchase shares of our common stock                                   
 pursuant to any present or future employee, director or consultant benefit plan or program of, or assumed by, us or any of our subsidiaries; |

| • |     | the issuance of any shares of our common stock pursuant to any option, warrant, right or convertible or 
 exchangeable security of ours outstanding as of the date we first issue the notes;                      |

S-35

| • |     | solely a change in the par value of our common stock; or |

| • |     | accrued and unpaid interest on the notes. |

Notice of Conversion Rate Adjustments Upon the effectiveness of any adjustment to the conversion rate pursuant to the provisions described above under the caption “—Conversion Rate Adjustments—Generally,” we will promptly send notice to the noteholders containing (i) a brief description of the transaction or other event on account of which such adjustment was made; (ii) the conversion rate in effect immediately after such adjustment; and (iii) the effective time of such adjustment. Voluntary Conversion Rate Increases To the extent permitted by law and applicable stock exchange rules, we, from time to time, may (but are not required to) increase the conversion rate by any amount if (i) our board of directors determines that such increase is in our best interest or that such increase is advisable to avoid or diminish any income tax imposed on holders of our common stock or rights to purchase our common stock as a result of any dividend or distribution of shares (or rights to acquire shares) of our common stock or any similar event; (ii) such increase is in effect for a period of at least 20 business days; and (iii) such increase is irrevocable during such period. Tax Considerations A holder or beneficial owner of the notes may, in some circumstances, including a cash distribution or dividend on our common stock, be deemed to have received a distribution that is subject to U.S. federal income tax as a result of an adjustment or the non-occurrenceof an adjustment to the conversion rate. Applicable withholding taxes (including backup withholding) may be withheld from interest and payments upon conversion, repurchase, redemption or maturity of the notes. In addition, if any withholding taxes (including backup withholding) are paid on behalf of a holder or beneficial owner, then those withholding taxes may be withheld from or set off against payments of cash or