Bitfury Top HoldCo B.V.

SEC source: 0001123292-26-001381 · form4.xml · derivative · entry 2

V3 Holding Ltd · CIK 0001887845 · 10% owner

Bitfury Top HoldCo B.V. · CIK 0001884407 · 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 footnotes

Disclosed balance after: 3,680,000

Underlying: Common Stock · 1,840,000 shares

Expires not disclosed

F1 · derivative.exercise_price: On October 5, 2026, Bitfury Top HoldCo B.V. ("Bitfury Top HoldCo") settled the first of three tranches of a variable prepaid forward sale contract (the "Forward Contract") that was entered into on November 14, 2025 with an unaffiliated third-party dealer (the "Dealer"). The Forward Contract obligates Bitfury Top HoldCo to deliver to the Dealer up to 1,840,000 shares of Common Stock in each of three tranches within one business day after each of the three maturity dates of the Forward Contract (October 2, 2026, October 30, 2026 and December 7, 2026), for an aggregate amount of up to 5,520,000 shares. In exchange for assuming this obligation, Bitfury Top HoldCo received a cash payment of $94.6 million as of the date of entering into the Forward Contract. Bitfury Top HoldCo pledged 5,520,000 shares of Common Stock (the "Pledged Shares") to secure its obligations under the Forward Contract. [Continued]

F2 · derivative.exercise_price: [Cont.] The number of shares of Common Stock to be delivered to the Dealer on each of the three maturity dates is to be determined as follows: (a) if the volume-weighted average price of Common Stock during the trading day immediately preceding the maturity date (the "Settlement Price") is less than or equal to $21.4439 (the "Floor Price"), the reporting person will deliver to the Dealer 1,840,000 shares; (b) if the Settlement Price is between the Floor Price and $37.5268 (the "Cap Price"), the reporting person will deliver to the Dealer a number of shares of Common Stock having a value (based on the then market price) equal to $39.5 million; and (c) if the Settlement Price is greater than the Cap Price, the reporting person will deliver to the Dealer a number of shares of Common Stock equal to 1,840,000 shares minus a number of shares of Common Stock having a value (based on the then market price) equal to $29.6 million. [Continued]

F3 · derivative.exercise_price: [Cont.] Bitfury Top HoldCo retained economic and voting rights in the Pledged Shares during the term of the pledge. On October 2, 2026, the Settlement Price was $15.87. Accordingly, Bitfury Top HoldCo transferred to the Dealer 1,840,000 shares.

F1 · kind: On October 5, 2026, Bitfury Top HoldCo B.V. ("Bitfury Top HoldCo") settled the first of three tranches of a variable prepaid forward sale contract (the "Forward Contract") that was entered into on November 14, 2025 with an unaffiliated third-party dealer (the "Dealer"). The Forward Contract obligates Bitfury Top HoldCo to deliver to the Dealer up to 1,840,000 shares of Common Stock in each of three tranches within one business day after each of the three maturity dates of the Forward Contract (October 2, 2026, October 30, 2026 and December 7, 2026), for an aggregate amount of up to 5,520,000 shares. In exchange for assuming this obligation, Bitfury Top HoldCo received a cash payment of $94.6 million as of the date of entering into the Forward Contract. Bitfury Top HoldCo pledged 5,520,000 shares of Common Stock (the "Pledged Shares") to secure its obligations under the Forward Contract. [Continued]

F2 · kind: [Cont.] The number of shares of Common Stock to be delivered to the Dealer on each of the three maturity dates is to be determined as follows: (a) if the volume-weighted average price of Common Stock during the trading day immediately preceding the maturity date (the "Settlement Price") is less than or equal to $21.4439 (the "Floor Price"), the reporting person will deliver to the Dealer 1,840,000 shares; (b) if the Settlement Price is between the Floor Price and $37.5268 (the "Cap Price"), the reporting person will deliver to the Dealer a number of shares of Common Stock having a value (based on the then market price) equal to $39.5 million; and (c) if the Settlement Price is greater than the Cap Price, the reporting person will deliver to the Dealer a number of shares of Common Stock equal to 1,840,000 shares minus a number of shares of Common Stock having a value (based on the then market price) equal to $29.6 million. [Continued]

F3 · kind: [Cont.] Bitfury Top HoldCo retained economic and voting rights in the Pledged Shares during the term of the pledge. On October 2, 2026, the Settlement Price was $15.87. Accordingly, Bitfury Top HoldCo transferred to the Dealer 1,840,000 shares.

F1 · derivative.exercise_date: On October 5, 2026, Bitfury Top HoldCo B.V. ("Bitfury Top HoldCo") settled the first of three tranches of a variable prepaid forward sale contract (the "Forward Contract") that was entered into on November 14, 2025 with an unaffiliated third-party dealer (the "Dealer"). The Forward Contract obligates Bitfury Top HoldCo to deliver to the Dealer up to 1,840,000 shares of Common Stock in each of three tranches within one business day after each of the three maturity dates of the Forward Contract (October 2, 2026, October 30, 2026 and December 7, 2026), for an aggregate amount of up to 5,520,000 shares. In exchange for assuming this obligation, Bitfury Top HoldCo received a cash payment of $94.6 million as of the date of entering into the Forward Contract. Bitfury Top HoldCo pledged 5,520,000 shares of Common Stock (the "Pledged Shares") to secure its obligations under the Forward Contract. [Continued]

F2 · derivative.exercise_date: [Cont.] The number of shares of Common Stock to be delivered to the Dealer on each of the three maturity dates is to be determined as follows: (a) if the volume-weighted average price of Common Stock during the trading day immediately preceding the maturity date (the "Settlement Price") is less than or equal to $21.4439 (the "Floor Price"), the reporting person will deliver to the Dealer 1,840,000 shares; (b) if the Settlement Price is between the Floor Price and $37.5268 (the "Cap Price"), the reporting person will deliver to the Dealer a number of shares of Common Stock having a value (based on the then market price) equal to $39.5 million; and (c) if the Settlement Price is greater than the Cap Price, the reporting person will deliver to the Dealer a number of shares of Common Stock equal to 1,840,000 shares minus a number of shares of Common Stock having a value (based on the then market price) equal to $29.6 million. [Continued]

F3 · derivative.exercise_date: [Cont.] Bitfury Top HoldCo retained economic and voting rights in the Pledged Shares during the term of the pledge. On October 2, 2026, the Settlement Price was $15.87. Accordingly, Bitfury Top HoldCo transferred to the Dealer 1,840,000 shares.

F1 · derivative.expiration_date: On October 5, 2026, Bitfury Top HoldCo B.V. ("Bitfury Top HoldCo") settled the first of three tranches of a variable prepaid forward sale contract (the "Forward Contract") that was entered into on November 14, 2025 with an unaffiliated third-party dealer (the "Dealer"). The Forward Contract obligates Bitfury Top HoldCo to deliver to the Dealer up to 1,840,000 shares of Common Stock in each of three tranches within one business day after each of the three maturity dates of the Forward Contract (October 2, 2026, October 30, 2026 and December 7, 2026), for an aggregate amount of up to 5,520,000 shares. In exchange for assuming this obligation, Bitfury Top HoldCo received a cash payment of $94.6 million as of the date of entering into the Forward Contract. Bitfury Top HoldCo pledged 5,520,000 shares of Common Stock (the "Pledged Shares") to secure its obligations under the Forward Contract. [Continued]

F2 · derivative.expiration_date: [Cont.] The number of shares of Common Stock to be delivered to the Dealer on each of the three maturity dates is to be determined as follows: (a) if the volume-weighted average price of Common Stock during the trading day immediately preceding the maturity date (the "Settlement Price") is less than or equal to $21.4439 (the "Floor Price"), the reporting person will deliver to the Dealer 1,840,000 shares; (b) if the Settlement Price is between the Floor Price and $37.5268 (the "Cap Price"), the reporting person will deliver to the Dealer a number of shares of Common Stock having a value (based on the then market price) equal to $39.5 million; and (c) if the Settlement Price is greater than the Cap Price, the reporting person will deliver to the Dealer a number of shares of Common Stock equal to 1,840,000 shares minus a number of shares of Common Stock having a value (based on the then market price) equal to $29.6 million. [Continued]

F3 · derivative.expiration_date: [Cont.] Bitfury Top HoldCo retained economic and voting rights in the Pledged Shares during the term of the pledge. On October 2, 2026, the Settlement Price was $15.87. Accordingly, Bitfury Top HoldCo transferred to the Dealer 1,840,000 shares.

F4 · ownership.nature: Bitfury Top HoldCo is the record holder of 25,603,382 shares of Common Stock. V3 Holding Limited ("V3") is the direct holder of 29,068,312 shares of Common Stock. Valerijs Vavilovs is the sole owner of V3, which is the majority owner of Bitfury Group Limited ("BGL"). BGL is the sole owner of Bitfury Top HoldCo. [Continued]

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 and BGL disclaim beneficial ownership of such shares except to the extent of their respective pecuniary interests therein.

SEC source: 0001123292-26-001381 · form4.xml · nonDerivative · entry 1

V3 Holding Ltd · CIK 0001887845 · 10% owner

Bitfury Top HoldCo B.V. · CIK 0001884407 · 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 footnotes

Disclosed balance after: 54,671,694

F1 · kind: On October 5, 2026, Bitfury Top HoldCo B.V. ("Bitfury Top HoldCo") settled the first of three tranches of a variable prepaid forward sale contract (the "Forward Contract") that was entered into on November 14, 2025 with an unaffiliated third-party dealer (the "Dealer"). The Forward Contract obligates Bitfury Top HoldCo to deliver to the Dealer up to 1,840,000 shares of Common Stock in each of three tranches within one business day after each of the three maturity dates of the Forward Contract (October 2, 2026, October 30, 2026 and December 7, 2026), for an aggregate amount of up to 5,520,000 shares. In exchange for assuming this obligation, Bitfury Top HoldCo received a cash payment of $94.6 million as of the date of entering into the Forward Contract. Bitfury Top HoldCo pledged 5,520,000 shares of Common Stock (the "Pledged Shares") to secure its obligations under the Forward Contract. [Continued]

F2 · kind: [Cont.] The number of shares of Common Stock to be delivered to the Dealer on each of the three maturity dates is to be determined as follows: (a) if the volume-weighted average price of Common Stock during the trading day immediately preceding the maturity date (the "Settlement Price") is less than or equal to $21.4439 (the "Floor Price"), the reporting person will deliver to the Dealer 1,840,000 shares; (b) if the Settlement Price is between the Floor Price and $37.5268 (the "Cap Price"), the reporting person will deliver to the Dealer a number of shares of Common Stock having a value (based on the then market price) equal to $39.5 million; and (c) if the Settlement Price is greater than the Cap Price, the reporting person will deliver to the Dealer a number of shares of Common Stock equal to 1,840,000 shares minus a number of shares of Common Stock having a value (based on the then market price) equal to $29.6 million. [Continued]

F3 · kind: [Cont.] Bitfury Top HoldCo retained economic and voting rights in the Pledged Shares during the term of the pledge. On October 2, 2026, the Settlement Price was $15.87. Accordingly, Bitfury Top HoldCo transferred to the Dealer 1,840,000 shares.

F1 · price: On October 5, 2026, Bitfury Top HoldCo B.V. ("Bitfury Top HoldCo") settled the first of three tranches of a variable prepaid forward sale contract (the "Forward Contract") that was entered into on November 14, 2025 with an unaffiliated third-party dealer (the "Dealer"). The Forward Contract obligates Bitfury Top HoldCo to deliver to the Dealer up to 1,840,000 shares of Common Stock in each of three tranches within one business day after each of the three maturity dates of the Forward Contract (October 2, 2026, October 30, 2026 and December 7, 2026), for an aggregate amount of up to 5,520,000 shares. In exchange for assuming this obligation, Bitfury Top HoldCo received a cash payment of $94.6 million as of the date of entering into the Forward Contract. Bitfury Top HoldCo pledged 5,520,000 shares of Common Stock (the "Pledged Shares") to secure its obligations under the Forward Contract. [Continued]

F2 · price: [Cont.] The number of shares of Common Stock to be delivered to the Dealer on each of the three maturity dates is to be determined as follows: (a) if the volume-weighted average price of Common Stock during the trading day immediately preceding the maturity date (the "Settlement Price") is less than or equal to $21.4439 (the "Floor Price"), the reporting person will deliver to the Dealer 1,840,000 shares; (b) if the Settlement Price is between the Floor Price and $37.5268 (the "Cap Price"), the reporting person will deliver to the Dealer a number of shares of Common Stock having a value (based on the then market price) equal to $39.5 million; and (c) if the Settlement Price is greater than the Cap Price, the reporting person will deliver to the Dealer a number of shares of Common Stock equal to 1,840,000 shares minus a number of shares of Common Stock having a value (based on the then market price) equal to $29.6 million. [Continued]

F3 · price: [Cont.] Bitfury Top HoldCo retained economic and voting rights in the Pledged Shares during the term of the pledge. On October 2, 2026, the Settlement Price was $15.87. Accordingly, Bitfury Top HoldCo transferred to the Dealer 1,840,000 shares.

F4 · ownership.nature: Bitfury Top HoldCo is the record holder of 25,603,382 shares of Common Stock. V3 Holding Limited ("V3") is the direct holder of 29,068,312 shares of Common Stock. Valerijs Vavilovs is the sole owner of V3, which is the majority owner of Bitfury Group Limited ("BGL"). BGL is the sole owner of Bitfury Top HoldCo. [Continued]

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 and BGL disclaim beneficial ownership of such shares except to the extent of their respective pecuniary interests therein.

SEC source: 0001123292-26-001333 · form4.xml · derivative · 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: Direct

Disclosed balance after: 3,610,000

Underlying: Common Stock · 1,805,000 shares

Expires not disclosed

F1 · derivative.exercise_price: On September 28, 2026, V3 Holding Limited ("V3") settled the first of three tranches of a variable prepaid forward sale contract (the "Forward Contract") that was entered into on November 3, 2025 with an unaffiliated third-party dealer (the "Dealer"). The Forward Contract obligates V3 to deliver to the Dealer up to 1,805,000 shares of Common Stock in each of three tranches within one business day after each of the three maturity dates of the Forward Contract (September 25, 2026, October 23, 2026 and November 30, 2026), for an aggregate amount of up to 5,415,000 shares. In exchange for assuming this obligation, V3 received a cash payment of $100.0 million as of the date of entering into the Forward Contract. V3 pledged 5,415,000 shares of Common Stock (the "Pledged Shares") to secure its obligations under the Forward Contract. [Continued]

F2 · derivative.exercise_price: [Cont.] The number of shares of Common Stock to be delivered to the Dealer on each of the three maturity dates are determined as follows: (a) if the volume-weighted average price of Common Stock during the trading day immediately preceding the maturity date (the "Settlement Price") is less than or equal to $21.4881 (the "Floor Price"), the reporting person will deliver to the Dealer 1,805,000 shares; (b) if the Settlement Price is between the Floor Price and $32.2322 (the "Cap Price"), the reporting person will deliver to the Dealer a number of shares of Common Stock having a value (based on the then market price) equal to $38.8 million; and (c) if the Settlement Price is greater than the Cap Price, the reporting person will deliver to the Dealer a number of shares of Common Stock equal to 1,805,000 shares minus a number of shares of Common Stock having a value (based on the then market price) equal to $19.4 million. [Continued]

F3 · derivative.exercise_price: [Cont.] V3 retained economic and voting rights in the Pledged Shares during the term of the pledge. On September 25, 2026, the Settlement Price was $17.83. Accordingly, V3 transferred to the Dealer 1,805,000 shares.

F1 · kind: On September 28, 2026, V3 Holding Limited ("V3") settled the first of three tranches of a variable prepaid forward sale contract (the "Forward Contract") that was entered into on November 3, 2025 with an unaffiliated third-party dealer (the "Dealer"). The Forward Contract obligates V3 to deliver to the Dealer up to 1,805,000 shares of Common Stock in each of three tranches within one business day after each of the three maturity dates of the Forward Contract (September 25, 2026, October 23, 2026 and November 30, 2026), for an aggregate amount of up to 5,415,000 shares. In exchange for assuming this obligation, V3 received a cash payment of $100.0 million as of the date of entering into the Forward Contract. V3 pledged 5,415,000 shares of Common Stock (the "Pledged Shares") to secure its obligations under the Forward Contract. [Continued]

F2 · kind: [Cont.] The number of shares of Common Stock to be delivered to the Dealer on each of the three maturity dates are determined as follows: (a) if the volume-weighted average price of Common Stock during the trading day immediately preceding the maturity date (the "Settlement Price") is less than or equal to $21.4881 (the "Floor Price"), the reporting person will deliver to the Dealer 1,805,000 shares; (b) if the Settlement Price is between the Floor Price and $32.2322 (the "Cap Price"), the reporting person will deliver to the Dealer a number of shares of Common Stock having a value (based on the then market price) equal to $38.8 million; and (c) if the Settlement Price is greater than the Cap Price, the reporting person will deliver to the Dealer a number of shares of Common Stock equal to 1,805,000 shares minus a number of shares of Common Stock having a value (based on the then market price) equal to $19.4 million. [Continued]

F3 · kind: [Cont.] V3 retained economic and voting rights in the Pledged Shares during the term of the pledge. On September 25, 2026, the Settlement Price was $17.83. Accordingly, V3 transferred to the Dealer 1,805,000 shares.

F1 · derivative.exercise_date: On September 28, 2026, V3 Holding Limited ("V3") settled the first of three tranches of a variable prepaid forward sale contract (the "Forward Contract") that was entered into on November 3, 2025 with an unaffiliated third-party dealer (the "Dealer"). The Forward Contract obligates V3 to deliver to the Dealer up to 1,805,000 shares of Common Stock in each of three tranches within one business day after each of the three maturity dates of the Forward Contract (September 25, 2026, October 23, 2026 and November 30, 2026), for an aggregate amount of up to 5,415,000 shares. In exchange for assuming this obligation, V3 received a cash payment of $100.0 million as of the date of entering into the Forward Contract. V3 pledged 5,415,000 shares of Common Stock (the "Pledged Shares") to secure its obligations under the Forward Contract. [Continued]

F2 · derivative.exercise_date: [Cont.] The number of shares of Common Stock to be delivered to the Dealer on each of the three maturity dates are determined as follows: (a) if the volume-weighted average price of Common Stock during the trading day immediately preceding the maturity date (the "Settlement Price") is less than or equal to $21.4881 (the "Floor Price"), the reporting person will deliver to the Dealer 1,805,000 shares; (b) if the Settlement Price is between the Floor Price and $32.2322 (the "Cap Price"), the reporting person will deliver to the Dealer a number of shares of Common Stock having a value (based on the then market price) equal to $38.8 million; and (c) if the Settlement Price is greater than the Cap Price, the reporting person will deliver to the Dealer a number of shares of Common Stock equal to 1,805,000 shares minus a number of shares of Common Stock having a value (based on the then market price) equal to $19.4 million. [Continued]

F3 · derivative.exercise_date: [Cont.] V3 retained economic and voting rights in the Pledged Shares during the term of the pledge. On September 25, 2026, the Settlement Price was $17.83. Accordingly, V3 transferred to the Dealer 1,805,000 shares.

F1 · derivative.expiration_date: On September 28, 2026, V3 Holding Limited ("V3") settled the first of three tranches of a variable prepaid forward sale contract (the "Forward Contract") that was entered into on November 3, 2025 with an unaffiliated third-party dealer (the "Dealer"). The Forward Contract obligates V3 to deliver to the Dealer up to 1,805,000 shares of Common Stock in each of three tranches within one business day after each of the three maturity dates of the Forward Contract (September 25, 2026, October 23, 2026 and November 30, 2026), for an aggregate amount of up to 5,415,000 shares. In exchange for assuming this obligation, V3 received a cash payment of $100.0 million as of the date of entering into the Forward Contract. V3 pledged 5,415,000 shares of Common Stock (the "Pledged Shares") to secure its obligations under the Forward Contract. [Continued]

F2 · derivative.expiration_date: [Cont.] The number of shares of Common Stock to be delivered to the Dealer on each of the three maturity dates are determined as follows: (a) if the volume-weighted average price of Common Stock during the trading day immediately preceding the maturity date (the "Settlement Price") is less than or equal to $21.4881 (the "Floor Price"), the reporting person will deliver to the Dealer 1,805,000 shares; (b) if the Settlement Price is between the Floor Price and $32.2322 (the "Cap Price"), the reporting person will deliver to the Dealer a number of shares of Common Stock having a value (based on the then market price) equal to $38.8 million; and (c) if the Settlement Price is greater than the Cap Price, the reporting person will deliver to the Dealer a number of shares of Common Stock equal to 1,805,000 shares minus a number of shares of Common Stock having a value (based on the then market price) equal to $19.4 million. [Continued]

F3 · derivative.expiration_date: [Cont.] V3 retained economic and voting rights in the Pledged Shares during the term of the pledge. On September 25, 2026, the Settlement Price was $17.83. Accordingly, V3 transferred to the Dealer 1,805,000 shares.

SEC source: 0001123292-26-001333 · 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: Direct

Disclosed balance after: 56,511,694

F1 · kind: On September 28, 2026, V3 Holding Limited ("V3") settled the first of three tranches of a variable prepaid forward sale contract (the "Forward Contract") that was entered into on November 3, 2025 with an unaffiliated third-party dealer (the "Dealer"). The Forward Contract obligates V3 to deliver to the Dealer up to 1,805,000 shares of Common Stock in each of three tranches within one business day after each of the three maturity dates of the Forward Contract (September 25, 2026, October 23, 2026 and November 30, 2026), for an aggregate amount of up to 5,415,000 shares. In exchange for assuming this obligation, V3 received a cash payment of $100.0 million as of the date of entering into the Forward Contract. V3 pledged 5,415,000 shares of Common Stock (the "Pledged Shares") to secure its obligations under the Forward Contract. [Continued]

F2 · kind: [Cont.] The number of shares of Common Stock to be delivered to the Dealer on each of the three maturity dates are determined as follows: (a) if the volume-weighted average price of Common Stock during the trading day immediately preceding the maturity date (the "Settlement Price") is less than or equal to $21.4881 (the "Floor Price"), the reporting person will deliver to the Dealer 1,805,000 shares; (b) if the Settlement Price is between the Floor Price and $32.2322 (the "Cap Price"), the reporting person will deliver to the Dealer a number of shares of Common Stock having a value (based on the then market price) equal to $38.8 million; and (c) if the Settlement Price is greater than the Cap Price, the reporting person will deliver to the Dealer a number of shares of Common Stock equal to 1,805,000 shares minus a number of shares of Common Stock having a value (based on the then market price) equal to $19.4 million. [Continued]

F3 · kind: [Cont.] V3 retained economic and voting rights in the Pledged Shares during the term of the pledge. On September 25, 2026, the Settlement Price was $17.83. Accordingly, V3 transferred to the Dealer 1,805,000 shares.

F1 · price: On September 28, 2026, V3 Holding Limited ("V3") settled the first of three tranches of a variable prepaid forward sale contract (the "Forward Contract") that was entered into on November 3, 2025 with an unaffiliated third-party dealer (the "Dealer"). The Forward Contract obligates V3 to deliver to the Dealer up to 1,805,000 shares of Common Stock in each of three tranches within one business day after each of the three maturity dates of the Forward Contract (September 25, 2026, October 23, 2026 and November 30, 2026), for an aggregate amount of up to 5,415,000 shares. In exchange for assuming this obligation, V3 received a cash payment of $100.0 million as of the date of entering into the Forward Contract. V3 pledged 5,415,000 shares of Common Stock (the "Pledged Shares") to secure its obligations under the Forward Contract. [Continued]

F2 · price: [Cont.] The number of shares of Common Stock to be delivered to the Dealer on each of the three maturity dates are determined as follows: (a) if the volume-weighted average price of Common Stock during the trading day immediately preceding the maturity date (the "Settlement Price") is less than or equal to $21.4881 (the "Floor Price"), the reporting person will deliver to the Dealer 1,805,000 shares; (b) if the Settlement Price is between the Floor Price and $32.2322 (the "Cap Price"), the reporting person will deliver to the Dealer a number of shares of Common Stock having a value (based on the then market price) equal to $38.8 million; and (c) if the Settlement Price is greater than the Cap Price, the reporting person will deliver to the Dealer a number of shares of Common Stock equal to 1,805,000 shares minus a number of shares of Common Stock having a value (based on the then market price) equal to $19.4 million. [Continued]

F3 · price: [Cont.] V3 retained economic and voting rights in the Pledged Shares during the term of the pledge. On September 25, 2026, the Settlement Price was $17.83. Accordingly, V3 transferred to the Dealer 1,805,000 shares.

SEC source: 0001123292-26-000815 · 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: 58,316,694

F2 · price: The price reported in Column 4 represents a weighted average sales price of $26.0983. These shares were sold in multiple transactions at prices ranging from $26.00 to $26.2929, inclusive.

F3 · ownership.nature: Bitfury Holding B.V. is the record holder of 4,821,560 shares of Common Stock. Bitfury Top HoldCo is the record holder of 22,621,822 shares of Common Stock and is the sole owner of Bitfury Holding B.V. As a result, Bitfury Top HoldCo may be deemed to share beneficial ownership of the shares of Common Stock held by Bitfury Holding B.V. V3 Holding Limited ("V3") is the direct holder of 30,873,312 shares of Common Stock. Valerijs Vavilovs is the sole owner of V3, which is the majority owner of Bitfury Group Limited ("BGL"). BGL is the sole owner of Bitfury Top HoldCo. [Continued]

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: 0001123292-26-000815 · 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: 58,539,116

F1 · price: The price reported in Column 4 represents a weighted average sales price of $25.3498. These shares were sold by Bitfury Top HoldCo B.V. ("Bitfury Top HoldCo") in multiple transactions at prices ranging from $25.00 to $25.9993, inclusive. The reporting persons undertake to provide to Cipher Digital Inc., any security holder of Cipher Digital Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each price within the ranges set forth in footnotes 1 and 2 of this Form 4.

F3 · ownership.nature: Bitfury Holding B.V. is the record holder of 4,821,560 shares of Common Stock. Bitfury Top HoldCo is the record holder of 22,621,822 shares of Common Stock and is the sole owner of Bitfury Holding B.V. As a result, Bitfury Top HoldCo may be deemed to share beneficial ownership of the shares of Common Stock held by Bitfury Holding B.V. V3 Holding Limited ("V3") is the direct holder of 30,873,312 shares of Common Stock. Valerijs Vavilovs is the sole owner of V3, which is the majority owner of Bitfury Group Limited ("BGL"). BGL is the sole owner of Bitfury Top HoldCo. [Continued]

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: 0001123292-26-000807 · 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: 59,516,694

F3 · price: The price reported in Column 4 represents a weighted average sales price of $28.09. These shares were sold in multiple transactions at prices ranging from $27.8226 to $28.2501, 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 23,821,822 shares of Common Stock and is the sole owner of Bitfury Holding B.V. As a result, Bitfury Top HoldCo may be deemed to share beneficial ownership of the shares of Common Stock held by Bitfury Holding B.V. V3 Holding Limited ("V3") is the direct holder of 30,873,312 shares of Common Stock. Valerijs Vavilovs is the sole owner of V3, which is the majority owner of Bitfury Group Limited ("BGL"). BGL is the sole owner of Bitfury Top HoldCo. [Continued]

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: 0001123292-26-000807 · 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: 59,545,534

F2 · price: The price reported in Column 4 represents a weighted average sales price of $27.1708. These shares were sold in multiple transactions at prices ranging from $26.82 to $27.816, 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 23,821,822 shares of Common Stock and is the sole owner of Bitfury Holding B.V. As a result, Bitfury Top HoldCo may be deemed to share beneficial ownership of the shares of Common Stock held by Bitfury Holding B.V. V3 Holding Limited ("V3") is the direct holder of 30,873,312 shares of Common Stock. Valerijs Vavilovs is the sole owner of V3, which is the majority owner of Bitfury Group Limited ("BGL"). BGL is the sole owner of Bitfury Top HoldCo. [Continued]

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: 0001123292-26-000807 · 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: 60,170,249

F1 · price: The price reported in Column 4 represents a weighted average sales price of $26.2779. These shares were sold in multiple transactions at prices ranging from $25.8199 to $26.8196, inclusive. The reporting persons undertake to provide to Cipher Digital Inc., any security holder of Cipher Digital Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each price within the ranges set forth in footnotes 1 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 23,821,822 shares of Common Stock and is the sole owner of Bitfury Holding B.V. As a result, Bitfury Top HoldCo may be deemed to share beneficial ownership of the shares of Common Stock held by Bitfury Holding B.V. V3 Holding Limited ("V3") is the direct holder of 30,873,312 shares of Common Stock. Valerijs Vavilovs is the sole owner of V3, which is the majority owner of Bitfury Group Limited ("BGL"). BGL is the sole owner of Bitfury Top HoldCo. [Continued]

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: 0001123292-26-000807 · form4.xml · derivative · 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: 2,000,000

Underlying: Common Stock · 2,000,000 shares

Expires not disclosed

F6 · derivative.exercise_price: On June 2, 2026, Bitfury Top HoldCo entered into a variable prepaid forward sale contract (the "Bitfury Forward Contract") with an unaffiliated third-party dealer (the "Dealer") covering a maximum of 2,000,000 shares of Common Stock. The Bitfury Forward Contract obligates Bitfury Top HoldCo to deliver to the Dealer up to 500,000 shares of Common Stock in each of four tranches within one business day after each of the four maturity dates of the Bitfury Forward Contract (May 14, 2027, May 21, 2027, May 28, 2027 and June 4, 2027)), for an aggregate amount of up to 2,000,000 shares. In exchange for assuming this obligation, Bitfury Top HoldCo received a cash payment of $41.9 million in connection with the entry into the Bitfury Forward Contract. The reporting person pledged 2,000,000 shares of Common Stock (the "Pledged Shares") to secure its obligations under the Bitfury Forward Contract. [Continued]

F7 · derivative.exercise_price: [Cont.] The number of shares of Common Stock to be delivered to the Dealer on each of the four maturity dates is to be determined as follows: (a) if the daily volume-weighted average price of Common Stock during the trading day immediately preceding the maturity date (the "Settlement Price") is less than or equal to $24.8655 (the "Floor Price"), the reporting person will deliver to the Dealer 500,000 shares; (b) if the Settlement Price is between the Floor Price and $37.2982 (the "Cap Price"), the reporting person will deliver to the Dealer a number of shares of Common Stock having a value (based on the then market price) equal to $12.4 million; and (c) if the Settlement Price is greater than the Cap Price, the reporting person will deliver to the Dealer a number of shares of Common Stock equal to 500,000 shares minus a number of shares of Common Stock having a value (based on the then market price) equal to $6.2 million. [Continued]

F8 · derivative.exercise_price: [Cont.] Bitfury Top HoldCo will retain economic and voting rights in the Pledged Shares during the term of the pledge (so long as no event of default or similar event occurs under the Forward Contract or the related pledge agreement).

F6 · kind: On June 2, 2026, Bitfury Top HoldCo entered into a variable prepaid forward sale contract (the "Bitfury Forward Contract") with an unaffiliated third-party dealer (the "Dealer") covering a maximum of 2,000,000 shares of Common Stock. The Bitfury Forward Contract obligates Bitfury Top HoldCo to deliver to the Dealer up to 500,000 shares of Common Stock in each of four tranches within one business day after each of the four maturity dates of the Bitfury Forward Contract (May 14, 2027, May 21, 2027, May 28, 2027 and June 4, 2027)), for an aggregate amount of up to 2,000,000 shares. In exchange for assuming this obligation, Bitfury Top HoldCo received a cash payment of $41.9 million in connection with the entry into the Bitfury Forward Contract. The reporting person pledged 2,000,000 shares of Common Stock (the "Pledged Shares") to secure its obligations under the Bitfury Forward Contract. [Continued]

F7 · kind: [Cont.] The number of shares of Common Stock to be delivered to the Dealer on each of the four maturity dates is to be determined as follows: (a) if the daily volume-weighted average price of Common Stock during the trading day immediately preceding the maturity date (the "Settlement Price") is less than or equal to $24.8655 (the "Floor Price"), the reporting person will deliver to the Dealer 500,000 shares; (b) if the Settlement Price is between the Floor Price and $37.2982 (the "Cap Price"), the reporting person will deliver to the Dealer a number of shares of Common Stock having a value (based on the then market price) equal to $12.4 million; and (c) if the Settlement Price is greater than the Cap Price, the reporting person will deliver to the Dealer a number of shares of Common Stock equal to 500,000 shares minus a number of shares of Common Stock having a value (based on the then market price) equal to $6.2 million. [Continued]

F8 · kind: [Cont.] Bitfury Top HoldCo will retain economic and voting rights in the Pledged Shares during the term of the pledge (so long as no event of default or similar event occurs under the Forward Contract or the related pledge agreement).

F6 · price: On June 2, 2026, Bitfury Top HoldCo entered into a variable prepaid forward sale contract (the "Bitfury Forward Contract") with an unaffiliated third-party dealer (the "Dealer") covering a maximum of 2,000,000 shares of Common Stock. The Bitfury Forward Contract obligates Bitfury Top HoldCo to deliver to the Dealer up to 500,000 shares of Common Stock in each of four tranches within one business day after each of the four maturity dates of the Bitfury Forward Contract (May 14, 2027, May 21, 2027, May 28, 2027 and June 4, 2027)), for an aggregate amount of up to 2,000,000 shares. In exchange for assuming this obligation, Bitfury Top HoldCo received a cash payment of $41.9 million in connection with the entry into the Bitfury Forward Contract. The reporting person pledged 2,000,000 shares of Common Stock (the "Pledged Shares") to secure its obligations under the Bitfury Forward Contract. [Continued]

F7 · price: [Cont.] The number of shares of Common Stock to be delivered to the Dealer on each of the four maturity dates is to be determined as follows: (a) if the daily volume-weighted average price of Common Stock during the trading day immediately preceding the maturity date (the "Settlement Price") is less than or equal to $24.8655 (the "Floor Price"), the reporting person will deliver to the Dealer 500,000 shares; (b) if the Settlement Price is between the Floor Price and $37.2982 (the "Cap Price"), the reporting person will deliver to the Dealer a number of shares of Common Stock having a value (based on the then market price) equal to $12.4 million; and (c) if the Settlement Price is greater than the Cap Price, the reporting person will deliver to the Dealer a number of shares of Common Stock equal to 500,000 shares minus a number of shares of Common Stock having a value (based on the then market price) equal to $6.2 million. [Continued]

F8 · price: [Cont.] Bitfury Top HoldCo will retain economic and voting rights in the Pledged Shares during the term of the pledge (so long as no event of default or similar event occurs under the Forward Contract or the related pledge agreement).

F6 · derivative.exercise_date: On June 2, 2026, Bitfury Top HoldCo entered into a variable prepaid forward sale contract (the "Bitfury Forward Contract") with an unaffiliated third-party dealer (the "Dealer") covering a maximum of 2,000,000 shares of Common Stock. The Bitfury Forward Contract obligates Bitfury Top HoldCo to deliver to the Dealer up to 500,000 shares of Common Stock in each of four tranches within one business day after each of the four maturity dates of the Bitfury Forward Contract (May 14, 2027, May 21, 2027, May 28, 2027 and June 4, 2027)), for an aggregate amount of up to 2,000,000 shares. In exchange for assuming this obligation, Bitfury Top HoldCo received a cash payment of $41.9 million in connection with the entry into the Bitfury Forward Contract. The reporting person pledged 2,000,000 shares of Common Stock (the "Pledged Shares") to secure its obligations under the Bitfury Forward Contract. [Continued]

F7 · derivative.exercise_date: [Cont.] The number of shares of Common Stock to be delivered to the Dealer on each of the four maturity dates is to be determined as follows: (a) if the daily volume-weighted average price of Common Stock during the trading day immediately preceding the maturity date (the "Settlement Price") is less than or equal to $24.8655 (the "Floor Price"), the reporting person will deliver to the Dealer 500,000 shares; (b) if the Settlement Price is between the Floor Price and $37.2982 (the "Cap Price"), the reporting person will deliver to the Dealer a number of shares of Common Stock having a value (based on the then market price) equal to $12.4 million; and (c) if the Settlement Price is greater than the Cap Price, the reporting person will deliver to the Dealer a number of shares of Common Stock equal to 500,000 shares minus a number of shares of Common Stock having a value (based on the then market price) equal to $6.2 million. [Continued]

F8 · derivative.exercise_date: [Cont.] Bitfury Top HoldCo will retain economic and voting rights in the Pledged Shares during the term of the pledge (so long as no event of default or similar event occurs under the Forward Contract or the related pledge agreement).

F6 · derivative.expiration_date: On June 2, 2026, Bitfury Top HoldCo entered into a variable prepaid forward sale contract (the "Bitfury Forward Contract") with an unaffiliated third-party dealer (the "Dealer") covering a maximum of 2,000,000 shares of Common Stock. The Bitfury Forward Contract obligates Bitfury Top HoldCo to deliver to the Dealer up to 500,000 shares of Common Stock in each of four tranches within one business day after each of the four maturity dates of the Bitfury Forward Contract (May 14, 2027, May 21, 2027, May 28, 2027 and June 4, 2027)), for an aggregate amount of up to 2,000,000 shares. In exchange for assuming this obligation, Bitfury Top HoldCo received a cash payment of $41.9 million in connection with the entry into the Bitfury Forward Contract. The reporting person pledged 2,000,000 shares of Common Stock (the "Pledged Shares") to secure its obligations under the Bitfury Forward Contract. [Continued]

F7 · derivative.expiration_date: [Cont.] The number of shares of Common Stock to be delivered to the Dealer on each of the four maturity dates is to be determined as follows: (a) if the daily volume-weighted average price of Common Stock during the trading day immediately preceding the maturity date (the "Settlement Price") is less than or equal to $24.8655 (the "Floor Price"), the reporting person will deliver to the Dealer 500,000 shares; (b) if the Settlement Price is between the Floor Price and $37.2982 (the "Cap Price"), the reporting person will deliver to the Dealer a number of shares of Common Stock having a value (based on the then market price) equal to $12.4 million; and (c) if the Settlement Price is greater than the Cap Price, the reporting person will deliver to the Dealer a number of shares of Common Stock equal to 500,000 shares minus a number of shares of Common Stock having a value (based on the then market price) equal to $6.2 million. [Continued]

F8 · derivative.expiration_date: [Cont.] Bitfury Top HoldCo will retain economic and voting rights in the Pledged Shares during the term of the pledge (so long as no event of default or similar event occurs under the Forward Contract or the related pledge agreement).

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 23,821,822 shares of Common Stock and is the sole owner of Bitfury Holding B.V. As a result, Bitfury Top HoldCo may be deemed to share beneficial ownership of the shares of Common Stock held by Bitfury Holding B.V. V3 Holding Limited ("V3") is the direct holder of 30,873,312 shares of Common Stock. Valerijs Vavilovs is the sole owner of V3, which is the majority owner of Bitfury Group Limited ("BGL"). BGL is the sole owner of Bitfury Top HoldCo. [Continued]

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: 0001123292-26-000679 · form4.xml · derivative · 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: 4,433,735

Underlying: Common Stock · 4,433,735 shares

Expires not disclosed

F5 · derivative.exercise_price: On May 15, 2026, Bitfury Top HoldCo entered into a variable prepaid forward sale contract (the "Bitfury Forward Contract") with the Dealer covering a maximum of 4,433,735 shares of Common Stock. The Bitfury Forward Contract obligates Bitfury Top HoldCo to deliver to the Dealer up to 738,956 shares of Common Stock in each of six tranches within one business day after each of the six maturity dates of the Bitfury Forward Contract (June 24, 2027, July 1, 2027, July 8, 2027, July 15, 2027,July 22, 2027 and July 29, 2027)), for an aggregate amount of up to 4,433,735 shares. In exchange for assuming this obligation, Bitfury Top HoldCo received a cash payment of $81.2 million in connection with the entry into the Bitfury Forward Contract. The reporting person pledged 4,433,735 shares of Common Stock (the "Pledged Shares") to secure its obligations under the Bitfury Forward Contract. [Continued]

F6 · derivative.exercise_price: [Cont.] The number of shares of Common Stock to be delivered to the Dealer on each of the six maturity dates is to be determined as follows: (a) if the closing price of Common Stock during the trading day immediately preceding the maturity date (the "Settlement Price") is less than or equal to $21.8071 (the "Floor Price"), the reporting person will deliver to the Dealer 738,956 shares; (b) if the Settlement Price is between the Floor Price and $32.7107 (the "Cap Price"), the reporting person will deliver to the Dealer a number of shares of Common Stock having a value (based on the then market price) equal to $21.8 million; and (c) if the Settlement Price is greater than the Cap Price, the reporting person will deliver to the Dealer a number of shares of Common Stock equal to 738,956 shares minus a number of shares of Common Stock having a value (based on the then market price) equal to $10.9 million. [Continued]

F7 · derivative.exercise_price: [Cont.] Bitfury Top HoldCo will retain economic and voting rights in the Pledged Shares during the term of the pledge (so long as no event of default or similar event occurs under the Forward Contract or the related pledge agreement).

F5 · kind: On May 15, 2026, Bitfury Top HoldCo entered into a variable prepaid forward sale contract (the "Bitfury Forward Contract") with the Dealer covering a maximum of 4,433,735 shares of Common Stock. The Bitfury Forward Contract obligates Bitfury Top HoldCo to deliver to the Dealer up to 738,956 shares of Common Stock in each of six tranches within one business day after each of the six maturity dates of the Bitfury Forward Contract (June 24, 2027, July 1, 2027, July 8, 2027, July 15, 2027,July 22, 2027 and July 29, 2027)), for an aggregate amount of up to 4,433,735 shares. In exchange for assuming this obligation, Bitfury Top HoldCo received a cash payment of $81.2 million in connection with the entry into the Bitfury Forward Contract. The reporting person pledged 4,433,735 shares of Common Stock (the "Pledged Shares") to secure its obligations under the Bitfury Forward Contract. [Continued]

F6 · kind: [Cont.] The number of shares of Common Stock to be delivered to the Dealer on each of the six maturity dates is to be determined as follows: (a) if the closing price of Common Stock during the trading day immediately preceding the maturity date (the "Settlement Price") is less than or equal to $21.8071 (the "Floor Price"), the reporting person will deliver to the Dealer 738,956 shares; (b) if the Settlement Price is between the Floor Price and $32.7107 (the "Cap Price"), the reporting person will deliver to the Dealer a number of shares of Common Stock having a value (based on the then market price) equal to $21.8 million; and (c) if the Settlement Price is greater than the Cap Price, the reporting person will deliver to the Dealer a number of shares of Common Stock equal to 738,956 shares minus a number of shares of Common Stock having a value (based on the then market price) equal to $10.9 million. [Continued]

F7 · kind: [Cont.] Bitfury Top HoldCo will retain economic and voting rights in the Pledged Shares during the term of the pledge (so long as no event of default or similar event occurs under the Forward Contract or the related pledge agreement).

F5 · price: On May 15, 2026, Bitfury Top HoldCo entered into a variable prepaid forward sale contract (the "Bitfury Forward Contract") with the Dealer covering a maximum of 4,433,735 shares of Common Stock. The Bitfury Forward Contract obligates Bitfury Top HoldCo to deliver to the Dealer up to 738,956 shares of Common Stock in each of six tranches within one business day after each of the six maturity dates of the Bitfury Forward Contract (June 24, 2027, July 1, 2027, July 8, 2027, July 15, 2027,July 22, 2027 and July 29, 2027)), for an aggregate amount of up to 4,433,735 shares. In exchange for assuming this obligation, Bitfury Top HoldCo received a cash payment of $81.2 million in connection with the entry into the Bitfury Forward Contract. The reporting person pledged 4,433,735 shares of Common Stock (the "Pledged Shares") to secure its obligations under the Bitfury Forward Contract. [Continued]

F6 · price: [Cont.] The number of shares of Common Stock to be delivered to the Dealer on each of the six maturity dates is to be determined as follows: (a) if the closing price of Common Stock during the trading day immediately preceding the maturity date (the "Settlement Price") is less than or equal to $21.8071 (the "Floor Price"), the reporting person will deliver to the Dealer 738,956 shares; (b) if the Settlement Price is between the Floor Price and $32.7107 (the "Cap Price"), the reporting person will deliver to the Dealer a number of shares of Common Stock having a value (based on the then market price) equal to $21.8 million; and (c) if the Settlement Price is greater than the Cap Price, the reporting person will deliver to the Dealer a number of shares of Common Stock equal to 738,956 shares minus a number of shares of Common Stock having a value (based on the then market price) equal to $10.9 million. [Continued]

F7 · price: [Cont.] Bitfury Top HoldCo will retain economic and voting rights in the Pledged Shares during the term of the pledge (so long as no event of default or similar event occurs under the Forward Contract or the related pledge agreement).

F5 · derivative.exercise_date: On May 15, 2026, Bitfury Top HoldCo entered into a variable prepaid forward sale contract (the "Bitfury Forward Contract") with the Dealer covering a maximum of 4,433,735 shares of Common Stock. The Bitfury Forward Contract obligates Bitfury Top HoldCo to deliver to the Dealer up to 738,956 shares of Common Stock in each of six tranches within one business day after each of the six maturity dates of the Bitfury Forward Contract (June 24, 2027, July 1, 2027, July 8, 2027, July 15, 2027,July 22, 2027 and July 29, 2027)), for an aggregate amount of up to 4,433,735 shares. In exchange for assuming this obligation, Bitfury Top HoldCo received a cash payment of $81.2 million in connection with the entry into the Bitfury Forward Contract. The reporting person pledged 4,433,735 shares of Common Stock (the "Pledged Shares") to secure its obligations under the Bitfury Forward Contract. [Continued]

F6 · derivative.exercise_date: [Cont.] The number of shares of Common Stock to be delivered to the Dealer on each of the six maturity dates is to be determined as follows: (a) if the closing price of Common Stock during the trading day immediately preceding the maturity date (the "Settlement Price") is less than or equal to $21.8071 (the "Floor Price"), the reporting person will deliver to the Dealer 738,956 shares; (b) if the Settlement Price is between the Floor Price and $32.7107 (the "Cap Price"), the reporting person will deliver to the Dealer a number of shares of Common Stock having a value (based on the then market price) equal to $21.8 million; and (c) if the Settlement Price is greater than the Cap Price, the reporting person will deliver to the Dealer a number of shares of Common Stock equal to 738,956 shares minus a number of shares of Common Stock having a value (based on the then market price) equal to $10.9 million. [Continued]

F7 · derivative.exercise_date: [Cont.] Bitfury Top HoldCo will retain economic and voting rights in the Pledged Shares during the term of the pledge (so long as no event of default or similar event occurs under the Forward Contract or the related pledge agreement).

F5 · derivative.expiration_date: On May 15, 2026, Bitfury Top HoldCo entered into a variable prepaid forward sale contract (the "Bitfury Forward Contract") with the Dealer covering a maximum of 4,433,735 shares of Common Stock. The Bitfury Forward Contract obligates Bitfury Top HoldCo to deliver to the Dealer up to 738,956 shares of Common Stock in each of six tranches within one business day after each of the six maturity dates of the Bitfury Forward Contract (June 24, 2027, July 1, 2027, July 8, 2027, July 15, 2027,July 22, 2027 and July 29, 2027)), for an aggregate amount of up to 4,433,735 shares. In exchange for assuming this obligation, Bitfury Top HoldCo received a cash payment of $81.2 million in connection with the entry into the Bitfury Forward Contract. The reporting person pledged 4,433,735 shares of Common Stock (the "Pledged Shares") to secure its obligations under the Bitfury Forward Contract. [Continued]

F6 · derivative.expiration_date: [Cont.] The number of shares of Common Stock to be delivered to the Dealer on each of the six maturity dates is to be determined as follows: (a) if the closing price of Common Stock during the trading day immediately preceding the maturity date (the "Settlement Price") is less than or equal to $21.8071 (the "Floor Price"), the reporting person will deliver to the Dealer 738,956 shares; (b) if the Settlement Price is between the Floor Price and $32.7107 (the "Cap Price"), the reporting person will deliver to the Dealer a number of shares of Common Stock having a value (based on the then market price) equal to $21.8 million; and (c) if the Settlement Price is greater than the Cap Price, the reporting person will deliver to the Dealer a number of shares of Common Stock equal to 738,956 shares minus a number of shares of Common Stock having a value (based on the then market price) equal to $10.9 million. [Continued]

F7 · derivative.expiration_date: [Cont.] Bitfury Top HoldCo will retain economic and voting rights in the Pledged Shares during the term of the pledge (so long as no event of default or similar event occurs under the Forward Contract or the related pledge agreement).

F4 · ownership.nature: Bitfury Group Limited ("BGL") is the sole owner of Bitfury Top HoldCo B.V. ("Bitfury Top HoldCo"), and V3 Holding Limited ("V3") is the majority owner of BGL. Valerijs Vavilovs is the sole owner of V3. As a result of the foregoing relationships, each of Mr. Vavilovs, V3 and BGL may be deemed to share beneficial ownership of the securities 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: 0001123292-26-000679 · form4.xml · derivative · 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: Direct

Disclosed balance after: 2,812,863

Underlying: Common Stock · 2,812,863 shares

Expires not disclosed

F1 · derivative.exercise_price: On May 13, 2026, V3 Holding Limited ("V3") entered into a variable prepaid forward sale contract (the "Forward Contract") with an unaffiliated third-party dealer (the "Dealer") covering a maximum of 2,812,863 shares of Common Stock. The Forward Contract obligates V3 to deliver to the Dealer up to 468,811 shares of Common Stock in each of six tranches within one business day after each of the six maturity dates of the Forward Contract (April 8, 2027, April 22, 2027, May 6, 2027, May 20, 2027, June 3, 2027 and June 17, 2027), for an aggregate amount of up to 2,812,863 shares. In exchange for assuming this obligation, V3 received a cash payment of $50.0 million in connection with the entry into the Forward Contract. The reporting person pledged 2,812,863 shares of Common Stock (the "Pledged Shares") to secure its obligations under the Forward Contract. [Continued]

F2 · derivative.exercise_price: [Cont.] The number of shares of Common Stock to be delivered to the Dealer on each of the six maturity dates is to be determined as follows: (a) if the closing price of Common Stock during the trading day immediately preceding the maturity date (the "Settlement Price") is less than or equal to $21.1613 (the "Floor Price"), the reporting person will deliver to the Dealer 468,811 shares; (b) if the Settlement Price is between the Floor Price and $31.7420 (the "Cap Price"), the reporting person will deliver to the Dealer a number of shares of Common Stock having a value (based on the then market price) equal to $9.9 million; and (c) if the Settlement Price is greater than the Cap Price, the reporting person will deliver to the Dealer a number of shares of Common Stock equal to 468,811 shares minus a number of shares of Common Stock having a value (based on the then market price) equal to $4.9 million. [Continued]

F3 · derivative.exercise_price: [Cont.] V3 will retain economic and voting rights in the Pledged Shares during the term of the pledge (so long as no event of default or similar event occurs under the Forward Contract or the related pledge agreement).

F1 · kind: On May 13, 2026, V3 Holding Limited ("V3") entered into a variable prepaid forward sale contract (the "Forward Contract") with an unaffiliated third-party dealer (the "Dealer") covering a maximum of 2,812,863 shares of Common Stock. The Forward Contract obligates V3 to deliver to the Dealer up to 468,811 shares of Common Stock in each of six tranches within one business day after each of the six maturity dates of the Forward Contract (April 8, 2027, April 22, 2027, May 6, 2027, May 20, 2027, June 3, 2027 and June 17, 2027), for an aggregate amount of up to 2,812,863 shares. In exchange for assuming this obligation, V3 received a cash payment of $50.0 million in connection with the entry into the Forward Contract. The reporting person pledged 2,812,863 shares of Common Stock (the "Pledged Shares") to secure its obligations under the Forward Contract. [Continued]

F2 · kind: [Cont.] The number of shares of Common Stock to be delivered to the Dealer on each of the six maturity dates is to be determined as follows: (a) if the closing price of Common Stock during the trading day immediately preceding the maturity date (the "Settlement Price") is less than or equal to $21.1613 (the "Floor Price"), the reporting person will deliver to the Dealer 468,811 shares; (b) if the Settlement Price is between the Floor Price and $31.7420 (the "Cap Price"), the reporting person will deliver to the Dealer a number of shares of Common Stock having a value (based on the then market price) equal to $9.9 million; and (c) if the Settlement Price is greater than the Cap Price, the reporting person will deliver to the Dealer a number of shares of Common Stock equal to 468,811 shares minus a number of shares of Common Stock having a value (based on the then market price) equal to $4.9 million. [Continued]

F3 · kind: [Cont.] V3 will retain economic and voting rights in the Pledged Shares during the term of the pledge (so long as no event of default or similar event occurs under the Forward Contract or the related pledge agreement).

F1 · price: On May 13, 2026, V3 Holding Limited ("V3") entered into a variable prepaid forward sale contract (the "Forward Contract") with an unaffiliated third-party dealer (the "Dealer") covering a maximum of 2,812,863 shares of Common Stock. The Forward Contract obligates V3 to deliver to the Dealer up to 468,811 shares of Common Stock in each of six tranches within one business day after each of the six maturity dates of the Forward Contract (April 8, 2027, April 22, 2027, May 6, 2027, May 20, 2027, June 3, 2027 and June 17, 2027), for an aggregate amount of up to 2,812,863 shares. In exchange for assuming this obligation, V3 received a cash payment of $50.0 million in connection with the entry into the Forward Contract. The reporting person pledged 2,812,863 shares of Common Stock (the "Pledged Shares") to secure its obligations under the Forward Contract. [Continued]

F2 · price: [Cont.] The number of shares of Common Stock to be delivered to the Dealer on each of the six maturity dates is to be determined as follows: (a) if the closing price of Common Stock during the trading day immediately preceding the maturity date (the "Settlement Price") is less than or equal to $21.1613 (the "Floor Price"), the reporting person will deliver to the Dealer 468,811 shares; (b) if the Settlement Price is between the Floor Price and $31.7420 (the "Cap Price"), the reporting person will deliver to the Dealer a number of shares of Common Stock having a value (based on the then market price) equal to $9.9 million; and (c) if the Settlement Price is greater than the Cap Price, the reporting person will deliver to the Dealer a number of shares of Common Stock equal to 468,811 shares minus a number of shares of Common Stock having a value (based on the then market price) equal to $4.9 million. [Continued]

F3 · price: [Cont.] V3 will retain economic and voting rights in the Pledged Shares during the term of the pledge (so long as no event of default or similar event occurs under the Forward Contract or the related pledge agreement).

F1 · derivative.exercise_date: On May 13, 2026, V3 Holding Limited ("V3") entered into a variable prepaid forward sale contract (the "Forward Contract") with an unaffiliated third-party dealer (the "Dealer") covering a maximum of 2,812,863 shares of Common Stock. The Forward Contract obligates V3 to deliver to the Dealer up to 468,811 shares of Common Stock in each of six tranches within one business day after each of the six maturity dates of the Forward Contract (April 8, 2027, April 22, 2027, May 6, 2027, May 20, 2027, June 3, 2027 and June 17, 2027), for an aggregate amount of up to 2,812,863 shares. In exchange for assuming this obligation, V3 received a cash payment of $50.0 million in connection with the entry into the Forward Contract. The reporting person pledged 2,812,863 shares of Common Stock (the "Pledged Shares") to secure its obligations under the Forward Contract. [Continued]

F2 · derivative.exercise_date: [Cont.] The number of shares of Common Stock to be delivered to the Dealer on each of the six maturity dates is to be determined as follows: (a) if the closing price of Common Stock during the trading day immediately preceding the maturity date (the "Settlement Price") is less than or equal to $21.1613 (the "Floor Price"), the reporting person will deliver to the Dealer 468,811 shares; (b) if the Settlement Price is between the Floor Price and $31.7420 (the "Cap Price"), the reporting person will deliver to the Dealer a number of shares of Common Stock having a value (based on the then market price) equal to $9.9 million; and (c) if the Settlement Price is greater than the Cap Price, the reporting person will deliver to the Dealer a number of shares of Common Stock equal to 468,811 shares minus a number of shares of Common Stock having a value (based on the then market price) equal to $4.9 million. [Continued]

F3 · derivative.exercise_date: [Cont.] V3 will retain economic and voting rights in the Pledged Shares during the term of the pledge (so long as no event of default or similar event occurs under the Forward Contract or the related pledge agreement).

F1 · derivative.expiration_date: On May 13, 2026, V3 Holding Limited ("V3") entered into a variable prepaid forward sale contract (the "Forward Contract") with an unaffiliated third-party dealer (the "Dealer") covering a maximum of 2,812,863 shares of Common Stock. The Forward Contract obligates V3 to deliver to the Dealer up to 468,811 shares of Common Stock in each of six tranches within one business day after each of the six maturity dates of the Forward Contract (April 8, 2027, April 22, 2027, May 6, 2027, May 20, 2027, June 3, 2027 and June 17, 2027), for an aggregate amount of up to 2,812,863 shares. In exchange for assuming this obligation, V3 received a cash payment of $50.0 million in connection with the entry into the Forward Contract. The reporting person pledged 2,812,863 shares of Common Stock (the "Pledged Shares") to secure its obligations under the Forward Contract. [Continued]

F2 · derivative.expiration_date: [Cont.] The number of shares of Common Stock to be delivered to the Dealer on each of the six maturity dates is to be determined as follows: (a) if the closing price of Common Stock during the trading day immediately preceding the maturity date (the "Settlement Price") is less than or equal to $21.1613 (the "Floor Price"), the reporting person will deliver to the Dealer 468,811 shares; (b) if the Settlement Price is between the Floor Price and $31.7420 (the "Cap Price"), the reporting person will deliver to the Dealer a number of shares of Common Stock having a value (based on the then market price) equal to $9.9 million; and (c) if the Settlement Price is greater than the Cap Price, the reporting person will deliver to the Dealer a number of shares of Common Stock equal to 468,811 shares minus a number of shares of Common Stock having a value (based on the then market price) equal to $4.9 million. [Continued]

F3 · derivative.expiration_date: [Cont.] V3 will retain economic and voting rights in the Pledged Shares during the term of the pledge (so long as no event of default or similar event occurs under the Forward Contract or the related pledge agreement).

F4 · ownership.direct: Bitfury Group Limited ("BGL") is the sole owner of Bitfury Top HoldCo B.V. ("Bitfury Top HoldCo"), and V3 Holding Limited ("V3") is the majority owner of BGL. Valerijs Vavilovs is the sole owner of V3. As a result of the foregoing relationships, each of Mr. Vavilovs, V3 and BGL may be deemed to share beneficial ownership of the securities 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: 0001123292-26-000663 · form4.xml · derivative · 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: Direct

Disclosed balance after: 5,675,984

Underlying: Common Stock · 5,675,984 shares

Expires not disclosed

F1 · derivative.exercise_price: On May 11, 2026, V3 Holding Limited ("V3") entered into a variable prepaid forward sale contract (the "Forward Contract") with an unaffiliated third-party dealer (the "Dealer") covering a maximum of 5,675,984 shares of Common Stock. The Forward Contract obligates V3 to deliver to the Dealer up to 945,998 shares of Common Stock in each of six tranches within one business day after each of the six maturity dates of the Forward Contract (April 1, 2027, April 15, 2027, April 29, 2027, May 13, 2027, May 27, 2027 and June 10, 2027), for an aggregate amount of up to 5,675,984 shares. In exchange for assuming this obligation, V3 received a cash payment of $100.0 million in connection with the entry into the Forward Contract. The reporting person pledged 5,675,984 shares of Common Stock (the "Pledged Shares") to secure its obligations under the Forward Contract. [Continued]

F2 · derivative.exercise_price: [Cont.] The number of shares of Common Stock to be delivered to the Dealer on each of the six maturity dates is to be determined as follows: (a) if the closing price of Common Stock during the trading day immediately preceding the maturity date (the "Settlement Price") is less than or equal to $21.4332 (the "Floor Price"), the reporting person will deliver to the Dealer 945,998 shares; (b) if the Settlement Price is between the Floor Price and $32.1498 (the "Cap Price"), the reporting person will deliver to the Dealer a number of shares of Common Stock having a value (based on the then market price) equal to $20.3 million; and (c) if the Settlement Price is greater than the Cap Price, the reporting person will deliver to the Dealer a number of shares of Common Stock equal to 945,998 shares minus a number of shares of Common Stock having a value (based on the then market price) equal to $10.1 million. [Continued]

F3 · derivative.exercise_price: [Cont.] V3 will retain economic and voting rights in the Pledged Shares during the term of the pledge (so long as no event of default or similar event occurs under the Forward Contract or the related pledge agreement).

F1 · kind: On May 11, 2026, V3 Holding Limited ("V3") entered into a variable prepaid forward sale contract (the "Forward Contract") with an unaffiliated third-party dealer (the "Dealer") covering a maximum of 5,675,984 shares of Common Stock. The Forward Contract obligates V3 to deliver to the Dealer up to 945,998 shares of Common Stock in each of six tranches within one business day after each of the six maturity dates of the Forward Contract (April 1, 2027, April 15, 2027, April 29, 2027, May 13, 2027, May 27, 2027 and June 10, 2027), for an aggregate amount of up to 5,675,984 shares. In exchange for assuming this obligation, V3 received a cash payment of $100.0 million in connection with the entry into the Forward Contract. The reporting person pledged 5,675,984 shares of Common Stock (the "Pledged Shares") to secure its obligations under the Forward Contract. [Continued]

F2 · kind: [Cont.] The number of shares of Common Stock to be delivered to the Dealer on each of the six maturity dates is to be determined as follows: (a) if the closing price of Common Stock during the trading day immediately preceding the maturity date (the "Settlement Price") is less than or equal to $21.4332 (the "Floor Price"), the reporting person will deliver to the Dealer 945,998 shares; (b) if the Settlement Price is between the Floor Price and $32.1498 (the "Cap Price"), the reporting person will deliver to the Dealer a number of shares of Common Stock having a value (based on the then market price) equal to $20.3 million; and (c) if the Settlement Price is greater than the Cap Price, the reporting person will deliver to the Dealer a number of shares of Common Stock equal to 945,998 shares minus a number of shares of Common Stock having a value (based on the then market price) equal to $10.1 million. [Continued]

F3 · kind: [Cont.] V3 will retain economic and voting rights in the Pledged Shares during the term of the pledge (so long as no event of default or similar event occurs under the Forward Contract or the related pledge agreement).

F1 · price: On May 11, 2026, V3 Holding Limited ("V3") entered into a variable prepaid forward sale contract (the "Forward Contract") with an unaffiliated third-party dealer (the "Dealer") covering a maximum of 5,675,984 shares of Common Stock. The Forward Contract obligates V3 to deliver to the Dealer up to 945,998 shares of Common Stock in each of six tranches within one business day after each of the six maturity dates of the Forward Contract (April 1, 2027, April 15, 2027, April 29, 2027, May 13, 2027, May 27, 2027 and June 10, 2027), for an aggregate amount of up to 5,675,984 shares. In exchange for assuming this obligation, V3 received a cash payment of $100.0 million in connection with the entry into the Forward Contract. The reporting person pledged 5,675,984 shares of Common Stock (the "Pledged Shares") to secure its obligations under the Forward Contract. [Continued]

F2 · price: [Cont.] The number of shares of Common Stock to be delivered to the Dealer on each of the six maturity dates is to be determined as follows: (a) if the closing price of Common Stock during the trading day immediately preceding the maturity date (the "Settlement Price") is less than or equal to $21.4332 (the "Floor Price"), the reporting person will deliver to the Dealer 945,998 shares; (b) if the Settlement Price is between the Floor Price and $32.1498 (the "Cap Price"), the reporting person will deliver to the Dealer a number of shares of Common Stock having a value (based on the then market price) equal to $20.3 million; and (c) if the Settlement Price is greater than the Cap Price, the reporting person will deliver to the Dealer a number of shares of Common Stock equal to 945,998 shares minus a number of shares of Common Stock having a value (based on the then market price) equal to $10.1 million. [Continued]

F3 · price: [Cont.] V3 will retain economic and voting rights in the Pledged Shares during the term of the pledge (so long as no event of default or similar event occurs under the Forward Contract or the related pledge agreement).

F1 · derivative.exercise_date: On May 11, 2026, V3 Holding Limited ("V3") entered into a variable prepaid forward sale contract (the "Forward Contract") with an unaffiliated third-party dealer (the "Dealer") covering a maximum of 5,675,984 shares of Common Stock. The Forward Contract obligates V3 to deliver to the Dealer up to 945,998 shares of Common Stock in each of six tranches within one business day after each of the six maturity dates of the Forward Contract (April 1, 2027, April 15, 2027, April 29, 2027, May 13, 2027, May 27, 2027 and June 10, 2027), for an aggregate amount of up to 5,675,984 shares. In exchange for assuming this obligation, V3 received a cash payment of $100.0 million in connection with the entry into the Forward Contract. The reporting person pledged 5,675,984 shares of Common Stock (the "Pledged Shares") to secure its obligations under the Forward Contract. [Continued]

F2 · derivative.exercise_date: [Cont.] The number of shares of Common Stock to be delivered to the Dealer on each of the six maturity dates is to be determined as follows: (a) if the closing price of Common Stock during the trading day immediately preceding the maturity date (the "Settlement Price") is less than or equal to $21.4332 (the "Floor Price"), the reporting person will deliver to the Dealer 945,998 shares; (b) if the Settlement Price is between the Floor Price and $32.1498 (the "Cap Price"), the reporting person will deliver to the Dealer a number of shares of Common Stock having a value (based on the then market price) equal to $20.3 million; and (c) if the Settlement Price is greater than the Cap Price, the reporting person will deliver to the Dealer a number of shares of Common Stock equal to 945,998 shares minus a number of shares of Common Stock having a value (based on the then market price) equal to $10.1 million. [Continued]

F3 · derivative.exercise_date: [Cont.] V3 will retain economic and voting rights in the Pledged Shares during the term of the pledge (so long as no event of default or similar event occurs under the Forward Contract or the related pledge agreement).

F1 · derivative.expiration_date: On May 11, 2026, V3 Holding Limited ("V3") entered into a variable prepaid forward sale contract (the "Forward Contract") with an unaffiliated third-party dealer (the "Dealer") covering a maximum of 5,675,984 shares of Common Stock. The Forward Contract obligates V3 to deliver to the Dealer up to 945,998 shares of Common Stock in each of six tranches within one business day after each of the six maturity dates of the Forward Contract (April 1, 2027, April 15, 2027, April 29, 2027, May 13, 2027, May 27, 2027 and June 10, 2027), for an aggregate amount of up to 5,675,984 shares. In exchange for assuming this obligation, V3 received a cash payment of $100.0 million in connection with the entry into the Forward Contract. The reporting person pledged 5,675,984 shares of Common Stock (the "Pledged Shares") to secure its obligations under the Forward Contract. [Continued]

F2 · derivative.expiration_date: [Cont.] The number of shares of Common Stock to be delivered to the Dealer on each of the six maturity dates is to be determined as follows: (a) if the closing price of Common Stock during the trading day immediately preceding the maturity date (the "Settlement Price") is less than or equal to $21.4332 (the "Floor Price"), the reporting person will deliver to the Dealer 945,998 shares; (b) if the Settlement Price is between the Floor Price and $32.1498 (the "Cap Price"), the reporting person will deliver to the Dealer a number of shares of Common Stock having a value (based on the then market price) equal to $20.3 million; and (c) if the Settlement Price is greater than the Cap Price, the reporting person will deliver to the Dealer a number of shares of Common Stock equal to 945,998 shares minus a number of shares of Common Stock having a value (based on the then market price) equal to $10.1 million. [Continued]

F3 · derivative.expiration_date: [Cont.] V3 will retain economic and voting rights in the Pledged Shares during the term of the pledge (so long as no event of default or similar event occurs under the Forward Contract or the related pledge agreement).

F4 · ownership.direct: Valerijs Vavilovs is the sole owner of V3. As a result, Mr. Vavilovs may be deemed to have beneficial ownership of the Common Stock owned by V3.

SEC source: 0001123292-25-000659 · form4.xml · derivative · 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: 5,520,000

Underlying: Common Stock · 5,520,000 shares

Expires not disclosed

F1 · derivative.exercise_price: On November 14, 2025, Bitfury Top HoldCo B.V. ("Bitfury Top HoldCo") entered into a variable prepaid forward sale contract (the "Forward Contract") with an unaffiliated third-party dealer (the "Dealer") covering a maximum of 5,520,000 shares of Common Stock. The Forward Contract obligates Bitfury Top HoldCo to deliver to the Dealer up to 1,840,000 shares of Common Stock in each of three tranches within one business day after each of the three maturity dates of the Forward Contract (October 2, 2026, October 30, 2026 and December 7, 2026), for an aggregate amount of up to 5,520,000 shares. In exchange for assuming this obligation, Bitfury Top HoldCo received a cash payment of $94.6 million in connection with the entry into the Forward Contract. The reporting person pledged 5,520,000 shares of Common Stock (the "Pledged Shares") to secure its obligations under the Forward Contract. [Continued]

F2 · derivative.exercise_price: [Cont.] The number of shares of Common Stock to be delivered to the Dealer on each of the three maturity dates is to be determined as follows: (a) if the closing price of Common Stock during the trading day immediately preceding the maturity date (the "Settlement Price") is less than or equal to $21.4439 (the "Floor Price"), the reporting person will deliver to the Dealer 1,840,000 shares; (b) if the Settlement Price is between the Floor Price and $37.5268 (the "Cap Price"), the reporting person will deliver to the Dealer a number of shares of Common Stock having a value (based on the then market price) equal to $39.5 million; and (c) if the Settlement Price is greater than the Cap Price, the reporting person will deliver to the Dealer a number of shares of Common Stock equal to 1,840,000 shares minus a number of shares of Common Stock having a value (based on the then market price) equal to $29.6 million. [Continued]

F3 · derivative.exercise_price: [Cont.] Bitfury Top HoldCo will retain economic and voting rights in the Pledged Shares during the term of the pledge (so long as no event of default or similar event occurs under the Forward Contract or the related pledge agreement).

F1 · kind: On November 14, 2025, Bitfury Top HoldCo B.V. ("Bitfury Top HoldCo") entered into a variable prepaid forward sale contract (the "Forward Contract") with an unaffiliated third-party dealer (the "Dealer") covering a maximum of 5,520,000 shares of Common Stock. The Forward Contract obligates Bitfury Top HoldCo to deliver to the Dealer up to 1,840,000 shares of Common Stock in each of three tranches within one business day after each of the three maturity dates of the Forward Contract (October 2, 2026, October 30, 2026 and December 7, 2026), for an aggregate amount of up to 5,520,000 shares. In exchange for assuming this obligation, Bitfury Top HoldCo received a cash payment of $94.6 million in connection with the entry into the Forward Contract. The reporting person pledged 5,520,000 shares of Common Stock (the "Pledged Shares") to secure its obligations under the Forward Contract. [Continued]

F2 · kind: [Cont.] The number of shares of Common Stock to be delivered to the Dealer on each of the three maturity dates is to be determined as follows: (a) if the closing price of Common Stock during the trading day immediately preceding the maturity date (the "Settlement Price") is less than or equal to $21.4439 (the "Floor Price"), the reporting person will deliver to the Dealer 1,840,000 shares; (b) if the Settlement Price is between the Floor Price and $37.5268 (the "Cap Price"), the reporting person will deliver to the Dealer a number of shares of Common Stock having a value (based on the then market price) equal to $39.5 million; and (c) if the Settlement Price is greater than the Cap Price, the reporting person will deliver to the Dealer a number of shares of Common Stock equal to 1,840,000 shares minus a number of shares of Common Stock having a value (based on the then market price) equal to $29.6 million. [Continued]

F3 · kind: [Cont.] Bitfury Top HoldCo will retain economic and voting rights in the Pledged Shares during the term of the pledge (so long as no event of default or similar event occurs under the Forward Contract or the related pledge agreement).

F1 · price: On November 14, 2025, Bitfury Top HoldCo B.V. ("Bitfury Top HoldCo") entered into a variable prepaid forward sale contract (the "Forward Contract") with an unaffiliated third-party dealer (the "Dealer") covering a maximum of 5,520,000 shares of Common Stock. The Forward Contract obligates Bitfury Top HoldCo to deliver to the Dealer up to 1,840,000 shares of Common Stock in each of three tranches within one business day after each of the three maturity dates of the Forward Contract (October 2, 2026, October 30, 2026 and December 7, 2026), for an aggregate amount of up to 5,520,000 shares. In exchange for assuming this obligation, Bitfury Top HoldCo received a cash payment of $94.6 million in connection with the entry into the Forward Contract. The reporting person pledged 5,520,000 shares of Common Stock (the "Pledged Shares") to secure its obligations under the Forward Contract. [Continued]

F2 · price: [Cont.] The number of shares of Common Stock to be delivered to the Dealer on each of the three maturity dates is to be determined as follows: (a) if the closing price of Common Stock during the trading day immediately preceding the maturity date (the "Settlement Price") is less than or equal to $21.4439 (the "Floor Price"), the reporting person will deliver to the Dealer 1,840,000 shares; (b) if the Settlement Price is between the Floor Price and $37.5268 (the "Cap Price"), the reporting person will deliver to the Dealer a number of shares of Common Stock having a value (based on the then market price) equal to $39.5 million; and (c) if the Settlement Price is greater than the Cap Price, the reporting person will deliver to the Dealer a number of shares of Common Stock equal to 1,840,000 shares minus a number of shares of Common Stock having a value (based on the then market price) equal to $29.6 million. [Continued]

F3 · price: [Cont.] Bitfury Top HoldCo will retain economic and voting rights in the Pledged Shares during the term of the pledge (so long as no event of default or similar event occurs under the Forward Contract or the related pledge agreement).

F1 · derivative.exercise_date: On November 14, 2025, Bitfury Top HoldCo B.V. ("Bitfury Top HoldCo") entered into a variable prepaid forward sale contract (the "Forward Contract") with an unaffiliated third-party dealer (the "Dealer") covering a maximum of 5,520,000 shares of Common Stock. The Forward Contract obligates Bitfury Top HoldCo to deliver to the Dealer up to 1,840,000 shares of Common Stock in each of three tranches within one business day after each of the three maturity dates of the Forward Contract (October 2, 2026, October 30, 2026 and December 7, 2026), for an aggregate amount of up to 5,520,000 shares. In exchange for assuming this obligation, Bitfury Top HoldCo received a cash payment of $94.6 million in connection with the entry into the Forward Contract. The reporting person pledged 5,520,000 shares of Common Stock (the "Pledged Shares") to secure its obligations under the Forward Contract. [Continued]

F2 · derivative.exercise_date: [Cont.] The number of shares of Common Stock to be delivered to the Dealer on each of the three maturity dates is to be determined as follows: (a) if the closing price of Common Stock during the trading day immediately preceding the maturity date (the "Settlement Price") is less than or equal to $21.4439 (the "Floor Price"), the reporting person will deliver to the Dealer 1,840,000 shares; (b) if the Settlement Price is between the Floor Price and $37.5268 (the "Cap Price"), the reporting person will deliver to the Dealer a number of shares of Common Stock having a value (based on the then market price) equal to $39.5 million; and (c) if the Settlement Price is greater than the Cap Price, the reporting person will deliver to the Dealer a number of shares of Common Stock equal to 1,840,000 shares minus a number of shares of Common Stock having a value (based on the then market price) equal to $29.6 million. [Continued]

F3 · derivative.exercise_date: [Cont.] Bitfury Top HoldCo will retain economic and voting rights in the Pledged Shares during the term of the pledge (so long as no event of default or similar event occurs under the Forward Contract or the related pledge agreement).

F1 · derivative.expiration_date: On November 14, 2025, Bitfury Top HoldCo B.V. ("Bitfury Top HoldCo") entered into a variable prepaid forward sale contract (the "Forward Contract") with an unaffiliated third-party dealer (the "Dealer") covering a maximum of 5,520,000 shares of Common Stock. The Forward Contract obligates Bitfury Top HoldCo to deliver to the Dealer up to 1,840,000 shares of Common Stock in each of three tranches within one business day after each of the three maturity dates of the Forward Contract (October 2, 2026, October 30, 2026 and December 7, 2026), for an aggregate amount of up to 5,520,000 shares. In exchange for assuming this obligation, Bitfury Top HoldCo received a cash payment of $94.6 million in connection with the entry into the Forward Contract. The reporting person pledged 5,520,000 shares of Common Stock (the "Pledged Shares") to secure its obligations under the Forward Contract. [Continued]

F2 · derivative.expiration_date: [Cont.] The number of shares of Common Stock to be delivered to the Dealer on each of the three maturity dates is to be determined as follows: (a) if the closing price of Common Stock during the trading day immediately preceding the maturity date (the "Settlement Price") is less than or equal to $21.4439 (the "Floor Price"), the reporting person will deliver to the Dealer 1,840,000 shares; (b) if the Settlement Price is between the Floor Price and $37.5268 (the "Cap Price"), the reporting person will deliver to the Dealer a number of shares of Common Stock having a value (based on the then market price) equal to $39.5 million; and (c) if the Settlement Price is greater than the Cap Price, the reporting person will deliver to the Dealer a number of shares of Common Stock equal to 1,840,000 shares minus a number of shares of Common Stock having a value (based on the then market price) equal to $29.6 million. [Continued]

F3 · derivative.expiration_date: [Cont.] Bitfury Top HoldCo will retain economic and voting rights in the Pledged Shares during the term of the pledge (so long as no event of default or similar event occurs under the Forward Contract or the related pledge agreement).

F4 · ownership.nature: Bitfury Group Limited ("BGL") is the sole owner of Bitfury Top HoldCo, and V3 Holding Limited ("V3") is the majority owner of BGL. Valerijs Vavilovs is the sole owner of V3. As a result of the foregoing relationships, each of Mr. Vavilovs, V3 and BGL may be deemed to share beneficial ownership of the securities 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: 0001123292-25-000611 · form4.xml · derivative · 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: Direct

Disclosed balance after: 5,415,000

Underlying: Common Stock · 5,415,000 shares

Expires not disclosed

F1 · derivative.exercise_price: On November 3, 2025, V3 Holding Limited ("V3") entered into a variable prepaid forward sale contract (the "Forward Contract") with an unaffiliated third-party dealer (the "Dealer") covering a maximum of 5,415,000 shares of Common Stock. The Forward Contract obligates V3 to deliver to the Dealer up to 1,805,000 shares of Common Stock in each of three tranches within one business day after each of the three maturity dates of the Forward Contract (September 25, 2026, October 23, 2026 and November 30, 2026), for an aggregate amount of up to 5,415,000 shares. In exchange for assuming this obligation, V3 received a cash payment of $100.0 million in connection with the entry into the Forward Contract. The reporting person pledged 5,415,000 shares of Common Stock (the "Pledged Shares") to secure its obligations under the Forward Contract. [Continued]

F2 · derivative.exercise_price: [Cont.] The number of shares of Common Stock to be delivered to the Dealer on each of the three maturity dates is to be determined as follows:(a) if the closing price of Common Stock during the trading day immediately preceding the maturity date (the "Settlement Price") is less than or equal to $21.4881 (the "Floor Price"), the reporting person will deliver to the Dealer 1,805,000 shares; (b) if the Settlement Price is between the Floor Price and $32.2322 (the "Cap Price"), the reporting person will deliver to the Dealer a number of shares of Common Stock having a value (based on the then market price) equal to $38.8 million; and (c) if the Settlement Price is greater than the Cap Price, the reporting person will deliver to the Dealer a number of shares of Common Stock equal to 1,805,000 shares minus a number of shares of Common Stock having a value (based on the then market price) equal to $19.4 million. [Continued]

F3 · derivative.exercise_price: [Cont.] V3 will retain economic and voting rights in the Pledged Shares during the term of the pledge (so long as no event of default or similar event occurs under the Forward Contract or the related pledge agreement).

F1 · kind: On November 3, 2025, V3 Holding Limited ("V3") entered into a variable prepaid forward sale contract (the "Forward Contract") with an unaffiliated third-party dealer (the "Dealer") covering a maximum of 5,415,000 shares of Common Stock. The Forward Contract obligates V3 to deliver to the Dealer up to 1,805,000 shares of Common Stock in each of three tranches within one business day after each of the three maturity dates of the Forward Contract (September 25, 2026, October 23, 2026 and November 30, 2026), for an aggregate amount of up to 5,415,000 shares. In exchange for assuming this obligation, V3 received a cash payment of $100.0 million in connection with the entry into the Forward Contract. The reporting person pledged 5,415,000 shares of Common Stock (the "Pledged Shares") to secure its obligations under the Forward Contract. [Continued]

F2 · kind: [Cont.] The number of shares of Common Stock to be delivered to the Dealer on each of the three maturity dates is to be determined as follows:(a) if the closing price of Common Stock during the trading day immediately preceding the maturity date (the "Settlement Price") is less than or equal to $21.4881 (the "Floor Price"), the reporting person will deliver to the Dealer 1,805,000 shares; (b) if the Settlement Price is between the Floor Price and $32.2322 (the "Cap Price"), the reporting person will deliver to the Dealer a number of shares of Common Stock having a value (based on the then market price) equal to $38.8 million; and (c) if the Settlement Price is greater than the Cap Price, the reporting person will deliver to the Dealer a number of shares of Common Stock equal to 1,805,000 shares minus a number of shares of Common Stock having a value (based on the then market price) equal to $19.4 million. [Continued]

F3 · kind: [Cont.] V3 will retain economic and voting rights in the Pledged Shares during the term of the pledge (so long as no event of default or similar event occurs under the Forward Contract or the related pledge agreement).

F1 · price: On November 3, 2025, V3 Holding Limited ("V3") entered into a variable prepaid forward sale contract (the "Forward Contract") with an unaffiliated third-party dealer (the "Dealer") covering a maximum of 5,415,000 shares of Common Stock. The Forward Contract obligates V3 to deliver to the Dealer up to 1,805,000 shares of Common Stock in each of three tranches within one business day after each of the three maturity dates of the Forward Contract (September 25, 2026, October 23, 2026 and November 30, 2026), for an aggregate amount of up to 5,415,000 shares. In exchange for assuming this obligation, V3 received a cash payment of $100.0 million in connection with the entry into the Forward Contract. The reporting person pledged 5,415,000 shares of Common Stock (the "Pledged Shares") to secure its obligations under the Forward Contract. [Continued]

F2 · price: [Cont.] The number of shares of Common Stock to be delivered to the Dealer on each of the three maturity dates is to be determined as follows:(a) if the closing price of Common Stock during the trading day immediately preceding the maturity date (the "Settlement Price") is less than or equal to $21.4881 (the "Floor Price"), the reporting person will deliver to the Dealer 1,805,000 shares; (b) if the Settlement Price is between the Floor Price and $32.2322 (the "Cap Price"), the reporting person will deliver to the Dealer a number of shares of Common Stock having a value (based on the then market price) equal to $38.8 million; and (c) if the Settlement Price is greater than the Cap Price, the reporting person will deliver to the Dealer a number of shares of Common Stock equal to 1,805,000 shares minus a number of shares of Common Stock having a value (based on the then market price) equal to $19.4 million. [Continued]

F3 · price: [Cont.] V3 will retain economic and voting rights in the Pledged Shares during the term of the pledge (so long as no event of default or similar event occurs under the Forward Contract or the related pledge agreement).

F1 · derivative.exercise_date: On November 3, 2025, V3 Holding Limited ("V3") entered into a variable prepaid forward sale contract (the "Forward Contract") with an unaffiliated third-party dealer (the "Dealer") covering a maximum of 5,415,000 shares of Common Stock. The Forward Contract obligates V3 to deliver to the Dealer up to 1,805,000 shares of Common Stock in each of three tranches within one business day after each of the three maturity dates of the Forward Contract (September 25, 2026, October 23, 2026 and November 30, 2026), for an aggregate amount of up to 5,415,000 shares. In exchange for assuming this obligation, V3 received a cash payment of $100.0 million in connection with the entry into the Forward Contract. The reporting person pledged 5,415,000 shares of Common Stock (the "Pledged Shares") to secure its obligations under the Forward Contract. [Continued]

F2 · derivative.exercise_date: [Cont.] The number of shares of Common Stock to be delivered to the Dealer on each of the three maturity dates is to be determined as follows:(a) if the closing price of Common Stock during the trading day immediately preceding the maturity date (the "Settlement Price") is less than or equal to $21.4881 (the "Floor Price"), the reporting person will deliver to the Dealer 1,805,000 shares; (b) if the Settlement Price is between the Floor Price and $32.2322 (the "Cap Price"), the reporting person will deliver to the Dealer a number of shares of Common Stock having a value (based on the then market price) equal to $38.8 million; and (c) if the Settlement Price is greater than the Cap Price, the reporting person will deliver to the Dealer a number of shares of Common Stock equal to 1,805,000 shares minus a number of shares of Common Stock having a value (based on the then market price) equal to $19.4 million. [Continued]

F3 · derivative.exercise_date: [Cont.] V3 will retain economic and voting rights in the Pledged Shares during the term of the pledge (so long as no event of default or similar event occurs under the Forward Contract or the related pledge agreement).

F1 · derivative.expiration_date: On November 3, 2025, V3 Holding Limited ("V3") entered into a variable prepaid forward sale contract (the "Forward Contract") with an unaffiliated third-party dealer (the "Dealer") covering a maximum of 5,415,000 shares of Common Stock. The Forward Contract obligates V3 to deliver to the Dealer up to 1,805,000 shares of Common Stock in each of three tranches within one business day after each of the three maturity dates of the Forward Contract (September 25, 2026, October 23, 2026 and November 30, 2026), for an aggregate amount of up to 5,415,000 shares. In exchange for assuming this obligation, V3 received a cash payment of $100.0 million in connection with the entry into the Forward Contract. The reporting person pledged 5,415,000 shares of Common Stock (the "Pledged Shares") to secure its obligations under the Forward Contract. [Continued]

F2 · derivative.expiration_date: [Cont.] The number of shares of Common Stock to be delivered to the Dealer on each of the three maturity dates is to be determined as follows:(a) if the closing price of Common Stock during the trading day immediately preceding the maturity date (the "Settlement Price") is less than or equal to $21.4881 (the "Floor Price"), the reporting person will deliver to the Dealer 1,805,000 shares; (b) if the Settlement Price is between the Floor Price and $32.2322 (the "Cap Price"), the reporting person will deliver to the Dealer a number of shares of Common Stock having a value (based on the then market price) equal to $38.8 million; and (c) if the Settlement Price is greater than the Cap Price, the reporting person will deliver to the Dealer a number of shares of Common Stock equal to 1,805,000 shares minus a number of shares of Common Stock having a value (based on the then market price) equal to $19.4 million. [Continued]

F3 · derivative.expiration_date: [Cont.] V3 will retain economic and voting rights in the Pledged Shares during the term of the pledge (so long as no event of default or similar event occurs under the Forward Contract or the related pledge agreement).

SEC source: 0001123292-25-000561 · 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: 61,316,694

F7 · price: The price reported in Column 4 represents a weighted average sales price of $21.1167. These shares were sold in multiple transactions at prices ranging from $21.02 to $21.14, 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 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 30,873,312 shares of Common Stock. Valerijs Vavilovs is the sole owner of V3, which is the majority owner of Bitfury Group Limited ("BGL"). BGL is the sole owner of Bitfury Top HoldCo. [Continued]

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: 0001123292-25-000561 · 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: 61,336,479

F6 · price: The price reported in Column 4 represents a weighted average sales price of $20.2901. These shares were sold in multiple transactions at prices ranging from $20.00 to $20.99, 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 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 30,873,312 shares of Common Stock. Valerijs Vavilovs is the sole owner of V3, which is the majority owner of Bitfury Group Limited ("BGL"). BGL is the sole owner of Bitfury Top HoldCo. [Continued]

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: 0001123292-25-000561 · 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: 61,852,537

F5 · price: The price reported in Column 4 represents a weighted average sales price of $21.8261. These shares were sold in multiple transactions at prices ranging from $21.76 to $21.99, 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 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 30,873,312 shares of Common Stock. Valerijs Vavilovs is the sole owner of V3, which is the majority owner of Bitfury Group Limited ("BGL"). BGL is the sole owner of Bitfury Top HoldCo. [Continued]

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: 0001123292-25-000561 · 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: 62,016,864

F4 · price: The price reported in Column 4 represents a weighted average sales price of $21.1994. These shares were sold in multiple transactions at prices ranging from $20.76 to $21.7598, 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 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 30,873,312 shares of Common Stock. Valerijs Vavilovs is the sole owner of V3, which is the majority owner of Bitfury Group Limited ("BGL"). BGL is the sole owner of Bitfury Top HoldCo. [Continued]

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: 0001123292-25-000561 · 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: 63,506,962

F3 · price: The price reported in Column 4 represents a weighted average sales price of $20.4197. These shares were sold in multiple transactions at prices ranging from $19.76 to $20.7573, 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 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 30,873,312 shares of Common Stock. Valerijs Vavilovs is the sole owner of V3, which is the majority owner of Bitfury Group Limited ("BGL"). BGL is the sole owner of Bitfury Top HoldCo. [Continued]

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: 0001123292-25-000561 · 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: 64,020,221

F2 · price: The price reported in Column 4 represents a weighted average sales price of $21.1605. These shares were sold in multiple transactions at prices ranging from $21.00 to $21.48, 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 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 30,873,312 shares of Common Stock. Valerijs Vavilovs is the sole owner of V3, which is the majority owner of Bitfury Group Limited ("BGL"). BGL is the sole owner of Bitfury Top HoldCo. [Continued]

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: 0001123292-25-000561 · 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: 64,544,650

F1 · price: The price reported in Column 4 represents a weighted average sales price of $20.6322. These shares were sold in multiple transactions at prices ranging from $20.00 to $20.995, 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 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 30,873,312 shares of Common Stock. Valerijs Vavilovs is the sole owner of V3, which is the majority owner of Bitfury Group Limited ("BGL"). BGL is the sole owner of Bitfury Top HoldCo. [Continued]

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: 0001123292-25-000474 · 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: 65,852,537

F5 · price: The price reported in Column 4 represents a weighted average sales price of $12.3871. These shares were sold in multiple transactions at prices ranging from $12.1405 to $12.76, 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 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: 67,852,537

F4 · price: The price reported in Column 4 represents a weighted average sales price of $12.5200. These shares were sold in multiple transactions at prices ranging from $12.405 to $12.67, 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 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 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: 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.