X0609 4 2026-06-04 0001819989 Cipher Digital Inc. CIFR 0001887845 V3 Holding Ltd true 4TH FL HARBOUR PL 103 S CHURCH ST, 10240 GRAND CAYMAN E9 KY1-1002 CAYMAN ISLANDS 0 0 1 0 0001884407 Bitfury Top HoldCo B.V. true CONCERTGEBOUWPLEIN 15-H AMSTERDAM P7 1071 LL NETHERLANDS 0 0 1 0 0001887853 Bitfury Holding B.V. true CONCERTGEBOUWPLEIN 15-H AMSTERDAM P7 1071 LL NETHERLANDS 0 0 1 0 0001887811 Vavilovs Valerijs true 2102 CHEDDAR CHEESE TOWER, PO BOX 712650 DUBAI C0 UNITED ARAB EMIRATES 0 0 1 0 0001887872 Bitfury Group Ltd true FIELDFISHER RIVERBANK HOUSE, 2 SWAN LANE LONDON X0 EC4R 3TT UNITED KINGDOM 0 0 1 0 0 Common Stock 2026-06-04 4 S 0 977578 25.35 D 58539116 I See Footnote Common Stock 2026-06-04 4 S 0 222422 26.10 D 58316694 I See Footnote The price reported in Column 4 represents a weighted average sales price of $25.3498. These shares were sold by Bitfury Top HoldCo B.V. ("Bitfury Top HoldCo") in multiple transactions at prices ranging from $25.00 to $25.9993, inclusive. The reporting persons undertake to provide to Cipher Digital Inc., any security holder of Cipher Digital Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each price within the ranges set forth in footnotes 1 and 2 of this Form 4. The price reported in Column 4 represents a weighted average sales price of $26.0983. These shares were sold in multiple transactions at prices ranging from $26.00 to $26.2929, inclusive. Bitfury Holding B.V. is the record holder of 4,821,560 shares of Common Stock. Bitfury Top HoldCo is the record holder of 22,621,822 shares of Common Stock and is the sole owner of Bitfury Holding B.V. As a result, Bitfury Top HoldCo may be deemed to share beneficial ownership of the shares of Common Stock held by Bitfury Holding B.V. V3 Holding Limited ("V3") is the direct holder of 30,873,312 shares of Common Stock. Valerijs Vavilovs is the sole owner of V3, which is the majority owner of Bitfury Group Limited ("BGL"). BGL is the sole owner of Bitfury Top HoldCo. [Continued] [Cont.] As a result of the foregoing relationships, each of Mr. Vavilovs, V3 and BGL may be deemed to share beneficial ownership of the Common Stock beneficially owned by Bitfury Top HoldCo, and Mr. Vavilovs may be deemed to have beneficial ownership of the Common Stock owned by V3. Each of Mr. Vavilovs, V3, Bitfury Top HoldCo, BGL and Bitfury Holding B.V. disclaim beneficial ownership of such shares except to the extent of their respective pecuniary interests therein. Stijn Ehren, Managing Director of Bitfury Top HoldCo B.V., By: /s/ Stijn Ehren 2026-06-08 Stijn Ehren, Managing Director of Bitfury Holding B.V., By: /s/ Stijn Ehren 2026-06-08 Valerijs Vavilovs, Director of Bitfury Group Limited, By: /s/ Valerijs Vavilovs 2026-06-08 Valerijs Vavilovs, Director of V3 Holding Limited, By: /s/ Valerijs Vavilovs 2026-06-08 Valerijs Vavilovs, By: /s/ Valerijs Vavilovs 2026-06-08