CIFR

SEC source: 0001123292-25-000474 · form4.xml · nonDerivative · entry 3

V3 Holding Ltd · CIK 0001887845 · 10% owner

Bitfury Top HoldCo B.V. · CIK 0001884407 · 10% owner

Bitfury Holding B.V. · CIK 0001887853 · 10% owner

Vavilovs Valerijs · CIK 0001887811 · 10% owner

Bitfury Group Ltd · CIK 0001887872 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 68,040,957

F3 · price: The price reported in Column 4 represents a weighted average sales price of $12.0326. These shares were sold in multiple transactions at prices ranging from $11.405 to $12.4048, inclusive.

F6 · ownership.nature: Bitfury Holding B.V. is the record holder of 4,821,560 shares of Common Stock. Bitfury Top HoldCo B.V. ("Bitfury Top HoldCo") is the record holder of 25,621,822 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 35,409,155 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]

F7 · ownership.nature: [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.

SEC source: 0001123292-25-000474 · form4.xml · nonDerivative · entry 2

V3 Holding Ltd · CIK 0001887845 · 10% owner

Bitfury Top HoldCo B.V. · CIK 0001884407 · 10% owner

Bitfury Holding B.V. · CIK 0001887853 · 10% owner

Vavilovs Valerijs · CIK 0001887811 · 10% owner

Bitfury Group Ltd · CIK 0001887872 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 69,852,537

F2 · price: The price reported in Column 4 represents a weighted average sales price of $12.1997. These shares were sold in multiple transactions at prices ranging from $12.0146 to $12.35, inclusive.

F6 · ownership.nature: Bitfury Holding B.V. is the record holder of 4,821,560 shares of Common Stock. Bitfury Top HoldCo B.V. ("Bitfury Top HoldCo") is the record holder of 25,621,822 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 35,409,155 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]

F7 · ownership.nature: [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.

SEC source: 0001123292-25-000474 · form4.xml · nonDerivative · entry 1

V3 Holding Ltd · CIK 0001887845 · 10% owner

Bitfury Top HoldCo B.V. · CIK 0001884407 · 10% owner

Bitfury Holding B.V. · CIK 0001887853 · 10% owner

Vavilovs Valerijs · CIK 0001887811 · 10% owner

Bitfury Group Ltd · CIK 0001887872 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 70,038,451

F1 · price: The price reported in Column 4 represents a weighted average sales price of $11.5259. These shares were sold in multiple transactions at prices ranging from $11.0135 to $12.0134, inclusive. The reporting person undertakes to provide to Cipher Mining Inc., any security holder of Cipher Mining 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 through 5 of this Form 4.

F6 · ownership.nature: Bitfury Holding B.V. is the record holder of 4,821,560 shares of Common Stock. Bitfury Top HoldCo B.V. ("Bitfury Top HoldCo") is the record holder of 25,621,822 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 35,409,155 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]

F7 · ownership.nature: [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.

SEC source: 0001123292-25-000469 · form4.xml · nonDerivative · entry 7

V3 Holding Ltd · CIK 0001887845 · 10% owner

Bitfury Top HoldCo B.V. · CIK 0001884407 · 10% owner

Bitfury Holding B.V. · CIK 0001887853 · 10% owner

Vavilovs Valerijs · CIK 0001887811 · 10% owner

Bitfury Group Ltd · CIK 0001887872 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 71,437,719

F7 · price: The price reported in Column 4 represents a weighted average sales price of $13.5152. These shares were sold in multiple transactions at prices ranging from $13.435 to $13.59, inclusive.

F8 · ownership.nature: Bitfury Holding B.V. is the record holder of 4,821,560 shares of Common Stock. Bitfury Top HoldCo B.V. ("Bitfury Top HoldCo") is the record holder of 31,207,004 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 35,409,155 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]

F9 · ownership.nature: [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.

SEC source: 0001123292-25-000469 · form4.xml · nonDerivative · entry 6

V3 Holding Ltd · CIK 0001887845 · 10% owner

Bitfury Top HoldCo B.V. · CIK 0001884407 · 10% owner

Bitfury Holding B.V. · CIK 0001887853 · 10% owner

Vavilovs Valerijs · CIK 0001887811 · 10% owner

Bitfury Group Ltd · CIK 0001887872 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 71,484,833

F6 · price: The price reported in Column 4 represents a weighted average sales price of $12.8019. These shares were sold in multiple transactions at prices ranging from $12.4337 to $13.4324, inclusive.

F8 · ownership.nature: Bitfury Holding B.V. is the record holder of 4,821,560 shares of Common Stock. Bitfury Top HoldCo B.V. ("Bitfury Top HoldCo") is the record holder of 31,207,004 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 35,409,155 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]

F9 · ownership.nature: [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.

SEC source: 0001123292-25-000469 · form4.xml · nonDerivative · entry 5

V3 Holding Ltd · CIK 0001887845 · 10% owner

Bitfury Top HoldCo B.V. · CIK 0001884407 · 10% owner

Bitfury Holding B.V. · CIK 0001887853 · 10% owner

Vavilovs Valerijs · CIK 0001887811 · 10% owner

Bitfury Group Ltd · CIK 0001887872 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 73,262,727

F5 · price: The price reported in Column 4 represents a weighted average sales price of $11.8674. These shares were sold in multiple transactions at prices ranging from $11.4337 to $12.4336, inclusive.

F8 · ownership.nature: Bitfury Holding B.V. is the record holder of 4,821,560 shares of Common Stock. Bitfury Top HoldCo B.V. ("Bitfury Top HoldCo") is the record holder of 31,207,004 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 35,409,155 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]

F9 · ownership.nature: [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.

SEC source: 0001123292-25-000469 · form4.xml · nonDerivative · entry 4

V3 Holding Ltd · CIK 0001887845 · 10% owner

Bitfury Top HoldCo B.V. · CIK 0001884407 · 10% owner

Bitfury Holding B.V. · CIK 0001887853 · 10% owner

Vavilovs Valerijs · CIK 0001887811 · 10% owner

Bitfury Group Ltd · CIK 0001887872 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 74,942,259

F4 · price: The price reported in Column 4 represents a weighted average sales price of $15.1149. These shares were sold in multiple transactions at prices ranging from $14.88 to $15.52, inclusive.

F8 · ownership.nature: Bitfury Holding B.V. is the record holder of 4,821,560 shares of Common Stock. Bitfury Top HoldCo B.V. ("Bitfury Top HoldCo") is the record holder of 31,207,004 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 35,409,155 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]

F9 · ownership.nature: [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.

SEC source: 0001123292-25-000469 · form4.xml · nonDerivative · entry 3

V3 Holding Ltd · CIK 0001887845 · 10% owner

Bitfury Top HoldCo B.V. · CIK 0001884407 · 10% owner

Bitfury Holding B.V. · CIK 0001887853 · 10% owner

Vavilovs Valerijs · CIK 0001887811 · 10% owner

Bitfury Group Ltd · CIK 0001887872 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 75,009,568

F3 · price: The price reported in Column 4 represents a weighted average sales price of $14.3513. These shares were sold in multiple transactions at prices ranging from $13.88 to $14.87, inclusive.

F8 · ownership.nature: Bitfury Holding B.V. is the record holder of 4,821,560 shares of Common Stock. Bitfury Top HoldCo B.V. ("Bitfury Top HoldCo") is the record holder of 31,207,004 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 35,409,155 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]

F9 · ownership.nature: [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.

SEC source: 0001123292-25-000469 · form4.xml · nonDerivative · entry 2

V3 Holding Ltd · CIK 0001887845 · 10% owner

Bitfury Top HoldCo B.V. · CIK 0001884407 · 10% owner

Bitfury Holding B.V. · CIK 0001887853 · 10% owner

Vavilovs Valerijs · CIK 0001887811 · 10% owner

Bitfury Group Ltd · CIK 0001887872 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 75,842,259

F2 · price: The price reported in Column 4 represents a weighted average sales price of $14.7067. These shares were sold in multiple transactions at prices ranging from $14.70 to $14.72, inclusive.

F8 · ownership.nature: Bitfury Holding B.V. is the record holder of 4,821,560 shares of Common Stock. Bitfury Top HoldCo B.V. ("Bitfury Top HoldCo") is the record holder of 31,207,004 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 35,409,155 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]

F9 · ownership.nature: [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.

SEC source: 0001123292-25-000469 · form4.xml · nonDerivative · entry 1

V3 Holding Ltd · CIK 0001887845 · 10% owner

Bitfury Top HoldCo B.V. · CIK 0001884407 · 10% owner

Bitfury Holding B.V. · CIK 0001887853 · 10% owner

Vavilovs Valerijs · CIK 0001887811 · 10% owner

Bitfury Group Ltd · CIK 0001887872 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 75,843,159

F1 · price: The price reported in Column 4 represents a weighted average sales price of $14.0095. These shares were sold in multiple transactions at prices ranging from $13.4613 to $14.61, inclusive. The reporting person undertakes to provide to Cipher Mining Inc., any security holder of Cipher Mining 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 through 7 of this Form 4.

F8 · ownership.nature: Bitfury Holding B.V. is the record holder of 4,821,560 shares of Common Stock. Bitfury Top HoldCo B.V. ("Bitfury Top HoldCo") is the record holder of 31,207,004 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 35,409,155 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]

F9 · ownership.nature: [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.

SEC source: 0001123292-25-000458 · form4.xml · nonDerivative · entry 6

V3 Holding Ltd · CIK 0001887845 · 10% owner

Bitfury Top HoldCo B.V. · CIK 0001884407 · 10% owner

Bitfury Holding B.V. · CIK 0001887853 · 10% owner

Vavilovs Valerijs · CIK 0001887811 · 10% owner

Bitfury Group Ltd · CIK 0001887872 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 76,742,259

F6 · price: The price reported in Column 4 represents a weighted average sales price of $14.1491. These shares were sold in multiple transactions at prices ranging from $14.12 to $14.1939, inclusive.

F7 · ownership.nature: Bitfury Holding B.V. is the record holder of 4,821,560 shares of Common Stock. Bitfury Top HoldCo B.V. ("Bitfury Top HoldCo") is the record holder of 36,511,544 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 35,409,155 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]

F8 · ownership.nature: [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.

SEC source: 0001123292-25-000458 · form4.xml · nonDerivative · entry 5

V3 Holding Ltd · CIK 0001887845 · 10% owner

Bitfury Top HoldCo B.V. · CIK 0001884407 · 10% owner

Bitfury Holding B.V. · CIK 0001887853 · 10% owner

Vavilovs Valerijs · CIK 0001887811 · 10% owner

Bitfury Group Ltd · CIK 0001887872 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 76,752,221

F5 · price: The price reported in Column 4 represents a weighted average sales price of $13.7075. These shares were sold in multiple transactions at prices ranging from $13.12 to $14.113, inclusive.

F7 · ownership.nature: Bitfury Holding B.V. is the record holder of 4,821,560 shares of Common Stock. Bitfury Top HoldCo B.V. ("Bitfury Top HoldCo") is the record holder of 36,511,544 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 35,409,155 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]

F8 · ownership.nature: [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.

SEC source: 0001123292-25-000458 · form4.xml · nonDerivative · entry 4

V3 Holding Ltd · CIK 0001887845 · 10% owner

Bitfury Top HoldCo B.V. · CIK 0001884407 · 10% owner

Bitfury Holding B.V. · CIK 0001887853 · 10% owner

Vavilovs Valerijs · CIK 0001887811 · 10% owner

Bitfury Group Ltd · CIK 0001887872 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 76,944,490

F4 · price: The price reported in Column 4 represents a weighted average sales price of $12.5879. These shares were sold in multiple transactions at prices ranging from $12.12 to $13.11, inclusive.

F7 · ownership.nature: Bitfury Holding B.V. is the record holder of 4,821,560 shares of Common Stock. Bitfury Top HoldCo B.V. ("Bitfury Top HoldCo") is the record holder of 36,511,544 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 35,409,155 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]

F8 · ownership.nature: [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.

SEC source: 0001123292-25-000458 · form4.xml · nonDerivative · entry 3

V3 Holding Ltd · CIK 0001887845 · 10% owner

Bitfury Top HoldCo B.V. · CIK 0001884407 · 10% owner

Bitfury Holding B.V. · CIK 0001887853 · 10% owner

Vavilovs Valerijs · CIK 0001887811 · 10% owner

Bitfury Group Ltd · CIK 0001887872 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 77,642,259

F3 · price: The price reported in Column 4 represents a weighted average sales price of $12.7502. These shares were sold in multiple transactions at prices ranging from $12.72 to $12.8167, inclusive.

F7 · ownership.nature: Bitfury Holding B.V. is the record holder of 4,821,560 shares of Common Stock. Bitfury Top HoldCo B.V. ("Bitfury Top HoldCo") is the record holder of 36,511,544 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 35,409,155 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]

F8 · ownership.nature: [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.

SEC source: 0001123292-25-000458 · form4.xml · nonDerivative · entry 2

V3 Holding Ltd · CIK 0001887845 · 10% owner

Bitfury Top HoldCo B.V. · CIK 0001884407 · 10% owner

Bitfury Holding B.V. · CIK 0001887853 · 10% owner

Vavilovs Valerijs · CIK 0001887811 · 10% owner

Bitfury Group Ltd · CIK 0001887872 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 77,693,060

F2 · price: The price reported in Column 4 represents a weighted average sales price of $12.3497. These shares were sold in multiple transactions at prices ranging from $11.72 to $12.719, inclusive.

F7 · ownership.nature: Bitfury Holding B.V. is the record holder of 4,821,560 shares of Common Stock. Bitfury Top HoldCo B.V. ("Bitfury Top HoldCo") is the record holder of 36,511,544 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 35,409,155 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]

F8 · ownership.nature: [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.

SEC source: 0001123292-25-000458 · form4.xml · nonDerivative · entry 1

V3 Holding Ltd · CIK 0001887845 · 10% owner

Bitfury Top HoldCo B.V. · CIK 0001884407 · 10% owner

Bitfury Holding B.V. · CIK 0001887853 · 10% owner

Vavilovs Valerijs · CIK 0001887811 · 10% owner

Bitfury Group Ltd · CIK 0001887872 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 78,542,259

F1 · price: The price reported in Column 4 represents a weighted average sales price of $11.7859. These shares were sold in multiple transactions at prices ranging from $11.45 to $12.26, inclusive. The reporting person undertakes to provide to Cipher Mining Inc., any security holder of Cipher Mining 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 through 6 of this Form 4.

F7 · ownership.nature: Bitfury Holding B.V. is the record holder of 4,821,560 shares of Common Stock. Bitfury Top HoldCo B.V. ("Bitfury Top HoldCo") is the record holder of 36,511,544 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 35,409,155 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]

F8 · ownership.nature: [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.

SEC source: 0001123292-25-000447 · form4.xml · nonDerivative · entry 5

V3 Holding Ltd · CIK 0001887845 · 10% owner

Bitfury Top HoldCo B.V. · CIK 0001884407 · 10% owner

Bitfury Holding B.V. · CIK 0001887853 · 10% owner

Vavilovs Valerijs · CIK 0001887811 · 10% owner

Bitfury Group Ltd · CIK 0001887872 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 79,442,259

F5 · price: The price reported in Column 4 represents a weighted average sales price of $12.3711. These shares were sold in multiple transactions at prices ranging from $12.21 to $12.6523, inclusive.

F6 · ownership.nature: Bitfury Holding B.V. is the record holder of 4,821,560 shares of Common Stock. Bitfury Top HoldCo B.V. ("Bitfury Top HoldCo") is the record holder of 39,211,544 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 35,409,155 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]

F7 · ownership.nature: [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.

SEC source: 0001123292-25-000447 · form4.xml · nonDerivative · entry 4

V3 Holding Ltd · CIK 0001887845 · 10% owner

Bitfury Top HoldCo B.V. · CIK 0001884407 · 10% owner

Bitfury Holding B.V. · CIK 0001887853 · 10% owner

Vavilovs Valerijs · CIK 0001887811 · 10% owner

Bitfury Group Ltd · CIK 0001887872 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 79,561,362

F4 · price: The price reported in Column 4 represents a weighted average sales price of $11.6776. These shares were sold in multiple transactions at prices ranging from $11.21 to $12.2093, inclusive.

F6 · ownership.nature: Bitfury Holding B.V. is the record holder of 4,821,560 shares of Common Stock. Bitfury Top HoldCo B.V. ("Bitfury Top HoldCo") is the record holder of 39,211,544 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 35,409,155 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]

F7 · ownership.nature: [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.

SEC source: 0001123292-25-000447 · form4.xml · nonDerivative · entry 3

V3 Holding Ltd · CIK 0001887845 · 10% owner

Bitfury Top HoldCo B.V. · CIK 0001884407 · 10% owner

Bitfury Holding B.V. · CIK 0001887853 · 10% owner

Vavilovs Valerijs · CIK 0001887811 · 10% owner

Bitfury Group Ltd · CIK 0001887872 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 80,342,259

F3 · price: The price reported in Column 4 represents a weighted average sales price of $11.5412. These shares were sold in multiple transactions at prices ranging from $11.4967 to $11.6344, inclusive.

F6 · ownership.nature: Bitfury Holding B.V. is the record holder of 4,821,560 shares of Common Stock. Bitfury Top HoldCo B.V. ("Bitfury Top HoldCo") is the record holder of 39,211,544 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 35,409,155 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]

F7 · ownership.nature: [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.

SEC source: 0001123292-25-000447 · form4.xml · nonDerivative · entry 2

V3 Holding Ltd · CIK 0001887845 · 10% owner

Bitfury Top HoldCo B.V. · CIK 0001884407 · 10% owner

Bitfury Holding B.V. · CIK 0001887853 · 10% owner

Vavilovs Valerijs · CIK 0001887811 · 10% owner

Bitfury Group Ltd · CIK 0001887872 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 80,516,552

F2 · price: The price reported in Column 4 represents a weighted average sales price of $11.1343. These shares were sold in multiple transactions at prices ranging from $10.496 to $11.4959, inclusive.

F6 · ownership.nature: Bitfury Holding B.V. is the record holder of 4,821,560 shares of Common Stock. Bitfury Top HoldCo B.V. ("Bitfury Top HoldCo") is the record holder of 39,211,544 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 35,409,155 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]

F7 · ownership.nature: [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.

SEC source: 0001887616-25-000004 · wk-form4_1758056251.xml · nonDerivative · entry 1

Kelly Patrick Arthur · CIK 0001887616 · Co-President and COO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 1,044,390

F1 · shares: 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 · price: The sales were executed in multiple trades at prices ranging from $10.50 to $11.28. 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.

SEC source: 0001123292-25-000447 · form4.xml · nonDerivative · entry 1

V3 Holding Ltd · CIK 0001887845 · 10% owner

Bitfury Top HoldCo B.V. · CIK 0001884407 · 10% owner

Bitfury Holding B.V. · CIK 0001887853 · 10% owner

Vavilovs Valerijs · CIK 0001887811 · 10% owner

Bitfury Group Ltd · CIK 0001887872 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 81,242,259

F1 · price: The price reported in Column 4 represents a weighted average sales price of $10.8022. These shares were sold in multiple transactions at prices ranging from $10.5072 to $11.31, inclusive. The reporting person undertakes to provide to Cipher Mining Inc., any security holder of Cipher Mining 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 through 5 of this Form 4.

F6 · ownership.nature: Bitfury Holding B.V. is the record holder of 4,821,560 shares of Common Stock. Bitfury Top HoldCo B.V. ("Bitfury Top HoldCo") is the record holder of 39,211,544 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 35,409,155 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]

F7 · ownership.nature: [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.

SEC source: 0001123292-25-000430 · form4.xml · nonDerivative · entry 5

V3 Holding Ltd · CIK 0001887845 · 10% owner

Bitfury Top HoldCo B.V. · CIK 0001884407 · 10% owner

Bitfury Holding B.V. · CIK 0001887853 · 10% owner

Vavilovs Valerijs · CIK 0001887811 · 10% owner

Bitfury Group Ltd · CIK 0001887872 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 82,142,259

F5 · price: The price reported in Column 4 represents a weighted average sales price of $10.8980. These shares were sold in multiple transactions at prices ranging from $10.89 to $10.92, inclusive.

F6 · ownership.nature: Bitfury Holding B.V. is the record holder of 4,821,560 shares of Common Stock. Bitfury Top HoldCo B.V. ("Bitfury Top HoldCo") is the record holder of 41,911,544 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 35,409,155 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]

F7 · ownership.nature: [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.

SEC source: 0001123292-25-000430 · form4.xml · nonDerivative · entry 4

V3 Holding Ltd · CIK 0001887845 · 10% owner

Bitfury Top HoldCo B.V. · CIK 0001884407 · 10% owner

Bitfury Holding B.V. · CIK 0001887853 · 10% owner

Vavilovs Valerijs · CIK 0001887811 · 10% owner

Bitfury Group Ltd · CIK 0001887872 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 82,163,412

F4 · price: The price reported in Column 4 represents a weighted average sales price of $10.5872. These shares were sold in multiple transactions at prices ranging from $9.89 to $10.885, inclusive.

F6 · ownership.nature: Bitfury Holding B.V. is the record holder of 4,821,560 shares of Common Stock. Bitfury Top HoldCo B.V. ("Bitfury Top HoldCo") is the record holder of 41,911,544 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 35,409,155 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]

F7 · ownership.nature: [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.

SEC source: 0001123292-25-000430 · form4.xml · nonDerivative · entry 3

V3 Holding Ltd · CIK 0001887845 · 10% owner

Bitfury Top HoldCo B.V. · CIK 0001884407 · 10% owner

Bitfury Holding B.V. · CIK 0001887853 · 10% owner

Vavilovs Valerijs · CIK 0001887811 · 10% owner

Bitfury Group Ltd · CIK 0001887872 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 83,042,259

F3 · price: The price reported in Column 4 represents a weighted average sales price of $10.2608. These shares were sold in multiple transactions at prices ranging from $9.88 to $10.67, inclusive.

F6 · ownership.nature: Bitfury Holding B.V. is the record holder of 4,821,560 shares of Common Stock. Bitfury Top HoldCo B.V. ("Bitfury Top HoldCo") is the record holder of 41,911,544 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 35,409,155 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]

F7 · ownership.nature: [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.

SEC source: 0001123292-25-000430 · form4.xml · nonDerivative · entry 2

V3 Holding Ltd · CIK 0001887845 · 10% owner

Bitfury Top HoldCo B.V. · CIK 0001884407 · 10% owner

Bitfury Holding B.V. · CIK 0001887853 · 10% owner

Vavilovs Valerijs · CIK 0001887811 · 10% owner

Bitfury Group Ltd · CIK 0001887872 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 83,942,259

F2 · price: The price reported in Column 4 represents a weighted average sales price of $10.2691. These shares were sold in multiple transactions at prices ranging from $10.25 to $10.4073, inclusive.

F6 · ownership.nature: Bitfury Holding B.V. is the record holder of 4,821,560 shares of Common Stock. Bitfury Top HoldCo B.V. ("Bitfury Top HoldCo") is the record holder of 41,911,544 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 35,409,155 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]

F7 · ownership.nature: [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.

SEC source: 0001123292-25-000430 · form4.xml · nonDerivative · entry 1

V3 Holding Ltd · CIK 0001887845 · 10% owner

Bitfury Top HoldCo B.V. · CIK 0001884407 · 10% owner

Bitfury Holding B.V. · CIK 0001887853 · 10% owner

Vavilovs Valerijs · CIK 0001887811 · 10% owner

Bitfury Group Ltd · CIK 0001887872 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 83,981,539

F1 · price: The price reported in Column 4 represents a weighted average sales price of $9.9729. These shares were sold in multiple transactions at prices ranging from $9.25 to $10.249, inclusive. The reporting person undertakes to provide to Cipher Mining Inc., any security holder of Cipher Mining 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 through 5 of this Form 4.

F6 · ownership.nature: Bitfury Holding B.V. is the record holder of 4,821,560 shares of Common Stock. Bitfury Top HoldCo B.V. ("Bitfury Top HoldCo") is the record holder of 41,911,544 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 35,409,155 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]

F7 · ownership.nature: [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.

SEC source: 0001062993-25-015508 · form4.xml · nonDerivative · entry 3

V3 Holding Ltd · CIK 0001887845 · 10% owner

Bitfury Top HoldCo B.V. · CIK 0001884407 · 10% owner

Bitfury Holding B.V. · CIK 0001887853 · 10% owner

Vavilovs Valerijs · CIK 0001887811 · 10% owner

Bitfury Group Ltd · CIK 0001887872 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 84,842,259

F3 · price: The price reported in Column 4 represents a weighted average sales price of $9.1560. These shares were sold in multiple transactions at prices ranging from $9.00 to $9.33, inclusive.

F4 · ownership.nature: Bitfury Holding B.V. is the record holder of 4,821,560 shares of Common Stock. Bitfury Top HoldCo B.V. ("Bitfury Top HoldCo") is the record holder of 43,711,544 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 36,309,155 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]

F5 · ownership.nature: [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.

SEC source: 0001062993-25-015508 · form4.xml · nonDerivative · entry 2

V3 Holding Ltd · CIK 0001887845 · 10% owner

Bitfury Top HoldCo B.V. · CIK 0001884407 · 10% owner

Bitfury Holding B.V. · CIK 0001887853 · 10% owner

Vavilovs Valerijs · CIK 0001887811 · 10% owner

Bitfury Group Ltd · CIK 0001887872 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 85,022,422

F2 · price: The price reported in Column 4 represents a weighted average sales price of $8.3433. These shares were sold in multiple transactions at prices ranging from $8.00 to $8.9978, inclusive.

F4 · ownership.nature: Bitfury Holding B.V. is the record holder of 4,821,560 shares of Common Stock. Bitfury Top HoldCo B.V. ("Bitfury Top HoldCo") is the record holder of 43,711,544 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 36,309,155 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]

F5 · ownership.nature: [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.

SEC source: 0001062993-25-015508 · form4.xml · nonDerivative · entry 1

V3 Holding Ltd · CIK 0001887845 · 10% owner

Bitfury Top HoldCo B.V. · CIK 0001884407 · 10% owner

Bitfury Holding B.V. · CIK 0001887853 · 10% owner

Vavilovs Valerijs · CIK 0001887811 · 10% owner

Bitfury Group Ltd · CIK 0001887872 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 85,442,259

F1 · price: The price reported in Column 4 represents a weighted average sales price of $7.4788. These shares were sold in multiple transactions at prices ranging from $7.17 to $7.83, inclusive. The reporting person undertakes to provide to Cipher Mining Inc., any security holder of Cipher Mining 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 through 3 of this Form 4.

F4 · ownership.nature: Bitfury Holding B.V. is the record holder of 4,821,560 shares of Common Stock. Bitfury Top HoldCo B.V. ("Bitfury Top HoldCo") is the record holder of 43,711,544 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 36,309,155 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]

F5 · ownership.nature: [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.

SEC source: 0001062993-25-015391 · form4.xml · nonDerivative · entry 2

V3 Holding Ltd · CIK 0001887845 · 10% owner

Bitfury Top HoldCo B.V. · CIK 0001884407 · 10% owner

Bitfury Holding B.V. · CIK 0001887853 · 10% owner

Vavilovs Valerijs · CIK 0001887811 · 10% owner

Bitfury Group Ltd · CIK 0001887872 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 86,042,259

F2 · price: The price reported in Column 4 represents a weighted average sales price of $7.3799. These shares were sold in multiple transactions at prices ranging from $7.09 to $7.80, inclusive.

F3 · ownership.nature: Bitfury Holding B.V. is the record holder of 4,821,560 shares of Common Stock. Bitfury Top HoldCo B.V. ("Bitfury Top HoldCo") is the record holder of 43,711,544 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 37,509,155 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]

F4 · ownership.nature: [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.

SEC source: 0001062993-25-015391 · form4.xml · nonDerivative · entry 1

V3 Holding Ltd · CIK 0001887845 · 10% owner

Bitfury Top HoldCo B.V. · CIK 0001884407 · 10% owner

Bitfury Holding B.V. · CIK 0001887853 · 10% owner

Vavilovs Valerijs · CIK 0001887811 · 10% owner

Bitfury Group Ltd · CIK 0001887872 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 86,642,259

F1 · price: The price reported in Column 4 represents a weighted average sales price of $7.5991. These shares were sold in multiple transactions at prices ranging from $7.33 to $8.0408, inclusive. The reporting person undertakes to provide to Cipher Mining Inc., any security holder of Cipher Mining 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.

F3 · ownership.nature: Bitfury Holding B.V. is the record holder of 4,821,560 shares of Common Stock. Bitfury Top HoldCo B.V. ("Bitfury Top HoldCo") is the record holder of 43,711,544 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 37,509,155 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]

F4 · ownership.nature: [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.

SEC source: 0001062993-25-015330 · form4.xml · nonDerivative · entry 2

V3 Holding Ltd · CIK 0001887845 · 10% owner

Bitfury Top HoldCo B.V. · CIK 0001884407 · 10% owner

Bitfury Holding B.V. · CIK 0001887853 · 10% owner

Vavilovs Valerijs · CIK 0001887811 · 10% owner

Bitfury Group Ltd · CIK 0001887872 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 87,342,259

F2 · price: The price reported in Column 4 represents a weighted average sales price of $8.3014. These shares were sold in multiple transactions at prices ranging from $8.02 to $8.70, inclusive.

F3 · ownership.nature: Bitfury Holding B.V. is the record holder of 4,821,560 shares of Common Stock. Bitfury Top HoldCo B.V. ("Bitfury Top HoldCo") is the record holder of 43,811,544 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 38,709,155 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]

F4 · ownership.nature: [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.

SEC source: 0001062993-25-015330 · form4.xml · nonDerivative · entry 1

V3 Holding Ltd · CIK 0001887845 · 10% owner

Bitfury Top HoldCo B.V. · CIK 0001884407 · 10% owner

Bitfury Holding B.V. · CIK 0001887853 · 10% owner

Vavilovs Valerijs · CIK 0001887811 · 10% owner

Bitfury Group Ltd · CIK 0001887872 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 87,942,259

F1 · price: The price reported in Column 4 represents a weighted average sales price of $8.1335. These shares were sold in multiple transactions at prices ranging from $7.895 to $8.34, inclusive. The reporting person undertakes to provide to Cipher Mining Inc., any security holder of Cipher Mining 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.

F3 · ownership.nature: Bitfury Holding B.V. is the record holder of 4,821,560 shares of Common Stock. Bitfury Top HoldCo B.V. ("Bitfury Top HoldCo") is the record holder of 43,811,544 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 38,709,155 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]

F4 · ownership.nature: [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.

SEC source: 0001062993-25-015161 · form4.xml · nonDerivative · entry 3

V3 Holding Ltd · CIK 0001887845 · 10% owner

Bitfury Top HoldCo B.V. · CIK 0001884407 · 10% owner

Bitfury Holding B.V. · CIK 0001887853 · 10% owner

Vavilovs Valerijs · CIK 0001887811 · 10% owner

Bitfury Group Ltd · CIK 0001887872 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 88,542,259

F3 · price: The price reported in Column 4 represents a weighted average sales price of $8.0528. These shares were sold in multiple transactions at prices ranging from $8.00 to $8.0923, inclusive.

F4 · ownership.nature: Bitfury Holding B.V. is the record holder of 4,821,560 shares of Common Stock. Bitfury Top HoldCo B.V. ("Bitfury Top HoldCo") is the record holder of 43,811,544 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 39,909,155 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]

F5 · ownership.nature: [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.

SEC source: 0001062993-25-015161 · form4.xml · nonDerivative · entry 2

V3 Holding Ltd · CIK 0001887845 · 10% owner

Bitfury Top HoldCo B.V. · CIK 0001884407 · 10% owner

Bitfury Holding B.V. · CIK 0001887853 · 10% owner

Vavilovs Valerijs · CIK 0001887811 · 10% owner

Bitfury Group Ltd · CIK 0001887872 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 88,551,455

F2 · price: The price reported in Column 4 represents a weighted average sales price of $7.4234. These shares were sold in multiple transactions at prices ranging from $7.00 to $7.9991, inclusive.

F4 · ownership.nature: Bitfury Holding B.V. is the record holder of 4,821,560 shares of Common Stock. Bitfury Top HoldCo B.V. ("Bitfury Top HoldCo") is the record holder of 43,811,544 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 39,909,155 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]

F5 · ownership.nature: [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.

SEC source: 0001062993-25-015161 · form4.xml · nonDerivative · entry 1

V3 Holding Ltd · CIK 0001887845 · 10% owner

Bitfury Top HoldCo B.V. · CIK 0001884407 · 10% owner

Bitfury Holding B.V. · CIK 0001887853 · 10% owner

Vavilovs Valerijs · CIK 0001887811 · 10% owner

Bitfury Group Ltd · CIK 0001887872 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 89,142,259

F1 · price: The price reported in Column 4 represents a weighted average sales price of $7.1091. These shares were sold in multiple transactions at prices ranging from $7.0084 to $7.31, inclusive. The reporting person undertakes to provide to Cipher Mining Inc., any security holder of Cipher Mining 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 through 3 of this Form 4.

F4 · ownership.nature: Bitfury Holding B.V. is the record holder of 4,821,560 shares of Common Stock. Bitfury Top HoldCo B.V. ("Bitfury Top HoldCo") is the record holder of 43,811,544 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 39,909,155 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]

F5 · ownership.nature: [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.

SEC source: 0001062993-25-015041 · form4.xml · nonDerivative · entry 2

V3 Holding Ltd · CIK 0001887845 · 10% owner

Bitfury Top HoldCo B.V. · CIK 0001884407 · 10% owner

Bitfury Holding B.V. · CIK 0001887853 · 10% owner

Vavilovs Valerijs · CIK 0001887811 · 10% owner

Bitfury Group Ltd · CIK 0001887872 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 89,742,259

F2 · price: The price reported in Column 4 represents a weighted average sales price of $7.0726. These shares were sold in multiple transactions at prices ranging from $6.9603 to $7.2264, inclusive.

F3 · ownership.nature: Bitfury Holding B.V. is the record holder of 4,821,560 shares of Common Stock. Bitfury Top HoldCo B.V. ("Bitfury Top HoldCo") is the record holder of 43,811,544 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 41,109,155 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]

F4 · ownership.nature: [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.

SEC source: 0001062993-25-015041 · form4.xml · nonDerivative · entry 1

V3 Holding Ltd · CIK 0001887845 · 10% owner

Bitfury Top HoldCo B.V. · CIK 0001884407 · 10% owner

Bitfury Holding B.V. · CIK 0001887853 · 10% owner

Vavilovs Valerijs · CIK 0001887811 · 10% owner

Bitfury Group Ltd · CIK 0001887872 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 90,242,259

F1 · price: The price reported in Column 4 represents a weighted average sales price of $6.8107. These shares were sold in multiple transactions at prices ranging from $6.4927 to $7.125, inclusive. The reporting person undertakes to provide to Cipher Mining Inc., any security holder of Cipher Mining 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.

F3 · ownership.nature: Bitfury Holding B.V. is the record holder of 4,821,560 shares of Common Stock. Bitfury Top HoldCo B.V. ("Bitfury Top HoldCo") is the record holder of 43,811,544 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 41,109,155 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]

F4 · ownership.nature: [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.

SEC source: 0001819989-25-000087 · wk-form4_1755642066.xml · nonDerivative · entry 1

GROSSMAN CARY M · CIK 0001240259 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 225,530

F1 · price: The price reported in Column 4 represents a weighted average sales price of $5.89. These shares were sold in multiple transactions at prices ranging from $5.85 to $5.935, inclusive. The reporting person undertakes to provide to Cipher Mining Inc., any security holder of Cipher Mining 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 range set forth in footnote 1 of this Form 4.

SEC source: 0001819989-25-000085 · wk-form4_1755641839.xml · nonDerivative · entry 1

Newsome James E · CIK 0001299581 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 194,313

F1 · price: The price reported in Column 4 represents a weighted average sales price of $6.16. These shares were sold in multiple transactions at prices ranging from $6.1601 to $6.165, inclusive. The reporting person undertakes to provide to Cipher Mining Inc., any security holder of Cipher Mining 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 range set forth in footnote 1 of this Form 4.

SEC source: 0001819989-25-000083 · wk-form4_1755640889.xml · nonDerivative · entry 1

Kelly Patrick Arthur · CIK 0001887616 · Co-President and COO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 1,089,260

F1 · shares: 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 · price: The sales were executed in multiple trades at prices ranging from $5.02 to $5.35. 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.

SEC source: 0001062993-25-013361 · form4.xml · nonDerivative · entry 2

V3 Holding Ltd · CIK 0001887845 · 10% owner

Bitfury Top HoldCo B.V. · CIK 0001884407 · 10% owner

Bitfury Holding B.V. · CIK 0001887853 · 10% owner

Vavilovs Valerijs · CIK 0001887811 · 10% owner

Bitfury Group Ltd · CIK 0001887872 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 90,942,259

F2 · price: The price reported in Column 4 represents a weighted average sales price of $5.6122. These shares were sold in multiple transactions at prices ranging from $5.50 to $5.85, inclusive.

F3 · ownership.nature: Bitfury Holding B.V. is the record holder of 4,821,560 shares of Common Stock. Bitfury Top HoldCo B.V. ("Bitfury Top HoldCo") is the record holder of 43,911,544 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 42,209,155 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]

F4 · ownership.nature: [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.

SEC source: 0001062993-25-013361 · form4.xml · nonDerivative · entry 1

V3 Holding Ltd · CIK 0001887845 · 10% owner

Bitfury Top HoldCo B.V. · CIK 0001884407 · 10% owner

Bitfury Holding B.V. · CIK 0001887853 · 10% owner

Vavilovs Valerijs · CIK 0001887811 · 10% owner

Bitfury Group Ltd · CIK 0001887872 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 91,312,243

F1 · price: The price reported in Column 4 represents a weighted average sales price of $6.0598. These shares were sold in multiple transactions at prices ranging from $6.00 to $6.19, inclusive. The reporting person undertakes to provide to Cipher Mining Inc., any security holder of Cipher Mining 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.

F3 · ownership.nature: Bitfury Holding B.V. is the record holder of 4,821,560 shares of Common Stock. Bitfury Top HoldCo B.V. ("Bitfury Top HoldCo") is the record holder of 43,911,544 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 42,209,155 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]

F4 · ownership.nature: [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.

SEC source: 0001062993-25-013244 · form4.xml · nonDerivative · entry 2

V3 Holding Ltd · CIK 0001887845 · 10% owner

Bitfury Top HoldCo B.V. · CIK 0001884407 · 10% owner

Bitfury Holding B.V. · CIK 0001887853 · 10% owner

Vavilovs Valerijs · CIK 0001887811 · 10% owner

Bitfury Group Ltd · CIK 0001887872 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 91,378,292

F2 · price: The price reported in Column 4 represents a weighted average sales price of $6.1874. These shares were sold in multiple transactions at prices ranging from $6.08 to $6.63, inclusive.

F3 · ownership.nature: Bitfury Holding B.V. is the record holder of 4,821,560 shares of Common Stock. Bitfury Top HoldCo B.V. ("Bitfury Top HoldCo") is the record holder of 43,911,544 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 42,645,188 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]

F4 · ownership.nature: [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.

SEC source: 0001062993-25-013244 · form4.xml · nonDerivative · entry 1

V3 Holding Ltd · CIK 0001887845 · 10% owner

Bitfury Top HoldCo B.V. · CIK 0001884407 · 10% owner

Bitfury Holding B.V. · CIK 0001887853 · 10% owner

Vavilovs Valerijs · CIK 0001887811 · 10% owner

Bitfury Group Ltd · CIK 0001887872 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 91,878,292

F1 · price: The price reported in Column 4 represents a weighted average sales price of $6.4542. These shares were sold in multiple transactions at prices ranging from $6.3128 to $6.5669, inclusive. The reporting person undertakes to provide to Cipher Mining Inc., any security holder of Cipher Mining 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.

F3 · ownership.nature: Bitfury Holding B.V. is the record holder of 4,821,560 shares of Common Stock. Bitfury Top HoldCo B.V. ("Bitfury Top HoldCo") is the record holder of 43,911,544 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 42,645,188 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]

F4 · ownership.nature: [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.

SEC source: 0001062993-25-013163 · form4.xml · nonDerivative · entry 2

V3 Holding Ltd · CIK 0001887845 · 10% owner

Bitfury Top HoldCo B.V. · CIK 0001884407 · 10% owner

Bitfury Holding B.V. · CIK 0001887853 · 10% owner

Vavilovs Valerijs · CIK 0001887811 · 10% owner

Bitfury Group Ltd · CIK 0001887872 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 92,378,292

F2 · price: The price reported in Column 4 represents a weighted average sales price of $6.6765. These shares were sold in multiple transactions at prices ranging from $6.49 to $6.865, inclusive.

F3 · ownership.nature: Bitfury Holding B.V. is the record holder of 4,821,560 shares of Common Stock. Bitfury Top HoldCo B.V. ("Bitfury Top HoldCo") is the record holder of 43,911,544 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 43,645,188 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]

F4 · ownership.nature: [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.

SEC source: 0001062993-25-013163 · form4.xml · nonDerivative · entry 1

V3 Holding Ltd · CIK 0001887845 · 10% owner

Bitfury Top HoldCo B.V. · CIK 0001884407 · 10% owner

Bitfury Holding B.V. · CIK 0001887853 · 10% owner

Vavilovs Valerijs · CIK 0001887811 · 10% owner

Bitfury Group Ltd · CIK 0001887872 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 92,878,292

F1 · price: The price reported in Column 4 represents a weighted average sales price of $6.5452. These shares were sold in multiple transactions at prices ranging from $6.286 to $6.76, inclusive. The reporting person undertakes to provide to Cipher Mining Inc., any security holder of Cipher Mining 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.

F3 · ownership.nature: Bitfury Holding B.V. is the record holder of 4,821,560 shares of Common Stock. Bitfury Top HoldCo B.V. ("Bitfury Top HoldCo") is the record holder of 43,911,544 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 43,645,188 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]

F4 · ownership.nature: [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.

SEC source: 0001062993-25-012916 · form4.xml · nonDerivative · entry 2

Bitfury Top HoldCo B.V. · CIK 0001884407 · 10% owner

V3 Holding Ltd · CIK 0001887845 · 10% owner

Bitfury Holding B.V. · CIK 0001887853 · 10% owner

Vavilovs Valerijs · CIK 0001887811 · 10% owner

Bitfury Group Ltd · CIK 0001887872 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 93,378,292

F2 · price: The price reported in Column 4 represents a weighted average sales price of $6.0622. These shares were sold in multiple transactions at prices ranging from $6.00 to $6.1952, inclusive.

F3 · ownership.nature: Bitfury Holding B.V. is the record holder of 4,821,560 shares of Common Stock. Bitfury Top HoldCo B.V. ("Bitfury Top HoldCo") is the record holder of 43,911,544 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 44,645,188 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]

F4 · ownership.nature: [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.

SEC source: 0001062993-25-012916 · form4.xml · nonDerivative · entry 1

Bitfury Top HoldCo B.V. · CIK 0001884407 · 10% owner

V3 Holding Ltd · CIK 0001887845 · 10% owner

Bitfury Holding B.V. · CIK 0001887853 · 10% owner

Vavilovs Valerijs · CIK 0001887811 · 10% owner

Bitfury Group Ltd · CIK 0001887872 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 93,667,437

F1 · price: The price reported in Column 4 represents a weighted average sales price of $6.1053. These shares were sold in multiple transactions at prices ranging from $6.00 to $6.3801, inclusive. The reporting person undertakes to provide to Cipher Mining Inc., any security holder of Cipher Mining 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.

F3 · ownership.nature: Bitfury Holding B.V. is the record holder of 4,821,560 shares of Common Stock. Bitfury Top HoldCo B.V. ("Bitfury Top HoldCo") is the record holder of 43,911,544 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 44,645,188 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]

F4 · ownership.nature: [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.