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Cipher Mining Inc. Director's Dealing 2025

Dec 18, 2025

31022_dirs_2025-12-17_f5431991-63b8-4a25-88a2-b35441b9dbde.zip

Director's Dealing

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SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Cipher Mining Inc. (CIFR)
CIK: 0001819989
Period of Report: 2025-12-15

Reporting Person: Kelly Patrick Arthur (Co-President and COO)

Non-Derivative Transactions

Date Security Code Shares Price A/D Holdings After Ownership
2025-12-15 Common Stock S 35569 $15.08 Disposed 1151770 Direct
2025-12-15 Common Stock M 470219 Acquired 1621989 Direct
2025-12-15 Common Stock F 240047 $14.74 Disposed 1381942 Direct
2025-12-15 Common Stock M 33968 Acquired 1415910 Direct
2025-12-15 Common Stock F 17341 $14.74 Disposed 1398569 Direct

Derivative Transactions

Date Security Exercise Price Code Shares A/D Expiration Underlying Ownership
2025-12-15 Restricted Stock Units $ M 470219 Disposed Common Stock (470219) Direct
2025-12-15 Restricted Stock Units $ M 33968 Disposed Common Stock (33968) Direct

Footnotes

F1: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 12, 2025.

F2: The sales were executed in multiple trades at prices ranging from $14.63 to $16.70. The price reported reflects the weighted average sale price. The Reporting Person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (2) to this Form 4.

F3: Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock.

F4: Represents the early vesting and settlement of the second installment of the RSU award granted on March 9, 2024.

F5: The RSUs vest in equal quarterly installments over a three-year period, on March 31, June 30, September 30 and December 15 of each year, subject to the Reporting Person's continuous service on the applicable vesting date. The first vesting date occurred on March 31, 2025.