X0609 4/A 2026-09-30 2026-10-02 0 0001819989 Cipher Digital Inc. CIFR 0002090886 Mumford Gregory J.D. false C/O CIPHER DIGITAL INC. 1 VANDERBILT AVENUE, FLOOR 54 NEW YORK NY 10017 0 1 0 0 Chief Financial Officer 0 Common Stock 2026-09-30 4 M 0 17109 A 37316 D Common Stock 2026-09-30 4 F 0 6895 15.83 D 30421 D Restricted Stock Units 2026-09-30 4 M 0 17109 0 D Common Stock 17109 528981 D Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's Common Stock. 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, 2026. This Form 4 is being amended to include shares withheld to satisfy tax withholding obligations. /s/ William Iwaschuk, Attorney-in-Fact for Gregory Mumford 2026-10-08