Company: CIFRW
Filing Date: 2025-09-25
Form Type: PRE 14A
Source: 0001819989-25-000090
Chunk: 0

Company: Cipher Mining Inc.
Filing Date: 2025-09-25
Form: PRE 14A
Chunk 0
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### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION

#### Washington, D.C. 20549
<div align='center'>_____________________________________________________________________</div>

#### SCHEDULE 14A
<div align='center'>(RULE 14a-101)</div>

### INFORMATION REQUIRED IN PROXY STATEMENT
<div align='center'>_____________________________________________________________________</div>

#### SCHEDULE 14A INFORMATION

#### Proxy Statement Pursuant to Section 14(a) of the

#### Securities Exchange Act of 1934
<div align='center'>(Amendment No. )

_____________________________________________________________________</div>

Filed by the Registrant x Filed by a Party other than the Registrant o

Check the appropriate box:

x Preliminary Proxy Statement

o Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

o Definitive Proxy Statement

o Definitive Additional Materials

o Soliciting Material under § 240.14a-12

#### Cipher Mining Inc.
<div align='center'>(Name of Registrant as Specified in its Charter)

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)</div>

Payment of Filing Fee (Check all boxes that apply):

x No fee required.

o Fee paid previously with preliminary materials.

o Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11.

<div align='center'>PRELIMINARY PROXY STATEMENT, SUBJECT TO COMPLETION

Cipher Mining Inc.

1 Vanderbilt Avenue, Floor 54

New York, New York 10017</div>

__________, 2025

Dear Fellow Stockholders:

On behalf of the Board of Directors, I cordially invite you to attend a special meeting of stockholders (the “Special Meeting”) of Cipher Mining Inc., which will be held on October _________, 2025, beginning at 8:00 a.m., Eastern Time. The Special Meeting will be a completely virtual meeting, which will be conducted via live webcast.

The Special Meeting will be held for the purpose of approving an amendment to the Company’s Second Amended and Restated Certificate of Incorporation to increase the number of shares of common stock, par value $0.001 per share (“Common Stock”), authorized for issuance from 500,000,000 shares to 1,000,000,000 shares (the “Charter Amendment”). The Charter Amendment is intended