Company: CIFRW
Filing Date: 2025-05-22
Form Type: 424B5
Source: 0001193125-25-124285
Chunk: 110

Company: Cipher Mining Inc.
Filing Date: 2025-05-22
Form: 424B5
Chunk 110
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 to their acceptance of the notes from us and subject to prior sale. The underwriting agreement provides that the obligations of the several underwriters to pay for and accept delivery of the notes offered by this prospectus supplement are subject to the approval of certain legal matters by their counsel and to certain other conditions. The underwriters are obligated to take and pay for all of the notes offered by this prospectus supplement if any such notes are taken. However, the underwriters are not required to take or pay for the notes covered by the underwriters’ option to purchase additional notes described below. The underwriters initially propose to offer the notes directly to the public at the offering price listed on the cover page of this prospectus supplement or to certain dealers at a price that represents a concession not in excess of 1.65% of the principal amount of the notes. After the initial offering of the notes, the offering price and other selling terms may from time to time be varied by the representative. We have granted the underwriters an option to purchase, exercisable within a 30-dayperiod from the date of this prospectus supplement, up to an additional $22.5 million principal amount of notes from us solely to cover over-allotments.If any additional notes are purchased with this option, the underwriters will offer such additional notes on the same terms as those on which the notes are being offered. The following table shows the per note and total public offering price, underwriting discounts and commissions, and proceeds before expenses to us. These amounts are shown assuming both no exercise and full exercise of the underwriters’ option to purchase up to an additional principal amount of notes, solely to cover over-allotments.

|                                                          |     | Per Note |          |     | No Exercise |             |     | Full Exercise |             |
|:---------------------------------------------------------|:----|:---------|---------:|:----|:------------|------------:|:----|:--------------|------------:|
| Public offering price                                    |     | $        | 1,000.00 |     | $           | 150,000,000 |     | $             | 172,500,000 |
| Underwriting discounts and commissions to be paid by us: |     | $        |    27.50 |     | $           |   4,125,000 |     | $             |   4,743,750 |
| Proceeds, before expenses, to us                         |     | $        |   972.50 |