D'Ambrosio Lance Varro

SEC source: 0001611745-26-000004 · form4-07062026_060704.xml · nonDerivative · entry 1

D'Ambrosio Lance Varro · CIK 0001611745 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 68,891

F1 · shares: Represents an award of restricted shares of the Issuer's common stock, no par value per share, granted to the Reporting Person under the Issuer's 2019 Equity Incentive Plan, as amended, as of the indicated date, in connection with service on the Issuer's Board of Directors through June 30, 2027. These shares are eligible to vest, if at all, in four approximately equal tranches on September 30, 2026, December 31, 2026, March 31, 2027, and June 30, 2027, subject to the Reporting Person's continued service with the Issuer through the applicable vesting dates.

SEC source: 0001415889-25-019808 · form4-07152025_060706.xml · nonDerivative · entry 1

D'Ambrosio Lance Varro · CIK 0001611745 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 60,544

F1 · shares: Represents an award of restricted shares of the Issuer's common stock, no par value per share, granted to the Reporting Person under the Issuer's 2019 Equity Incentive Plan, as amended, as of the indicated date, in connection with service on the Issuer's Board of Directors through June 30, 2026. These shares are eligible to vest, if at all, in four approximately equal tranches on September 30, 2025, December 31, 2025, March 31, 2026, and June 30, 2026, subject to the Reporting Person's continued service with the Issuer through the applicable vesting dates.

SEC source: 0001611745-25-000003 · form4a-10102025_111025.xml · nonDerivative · entry 1

D'Ambrosio Lance Varro · CIK 0001611745 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 60,544

F1 · security: This Form 4 amendment is being filed solely to add the Power of Attorney, attached as Exhibit 24.

F2 · shares: Represents an award of restricted shares of the Issuer's common stock, no par value per share, granted to the Reporting Person under the Issuer's 2019 Equity Incentive Plan, as amended, as of the indicated date, in connection with service on the Issuer's Board of Directors through June 30, 2026. These shares are eligible to vest, if at all, in four approximately equal tranches on September 30, 2025, December 31, 2025, March 31, 2026, and June 30, 2026, subject to the Reporting Person's continued service with the Issuer through the applicable vesting dates.

SEC source: 0001415889-24-023622 · form4-09182024_040902.xml · nonDerivative · entry 1

D'Ambrosio Lance Varro · CIK 0001611745 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 44,441

F1 · price: The shares were sold on the indicated date in a series of multiple transactions at prices ranging from $6.975 to $7.04, inclusive, per share. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide, upon request, to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transactions were effected.

SEC source: 0001415889-24-019231 · form4-07032024_050705.xml · nonDerivative · entry 1

D'Ambrosio Lance Varro · CIK 0001611745 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 69,441

F1 · shares: Represents an award of restricted shares of the Issuer's common stock, no par value per share granted to the Reporting Person under the Issuer's 2019 Equity Incentive Plan, as amended, (the "Equity Plan") as of the indicated date, in connection with service on the Issuer's Board of Directors through July 1, 2025. The shares are subject to restrictions and at risk of forfeiture until vested, as set forth in the applicable equity agreement with the Issuer. Such shares are eligible to vest, if at all, in four equal quarterly tranches after the grant date, subject to the Reporting Person's continued service with the Issuer through vesting.

SEC source: 0001415889-24-000468 · form4-01042024_010142.xml · nonDerivative · entry 1

D'Ambrosio Lance Varro · CIK 0001611745 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 45,441

F1 · shares: Represents an award of restricted shares of the Issuer's common stock, no par value per share, ("Common Stock") granted to the Reporting Person under the Issuer's 2019 Equity Incentive Plan, as amended, (the "Equity Plan") as of the indicated date, in connection with service on the Issuer's Board of Directors (the "Board") through 2024. The shares are subject to restrictions and at risk of forfeiture until vested, as set forth in the applicable equity agreement with the Issuer, dated as of the indicated grant date. The shares are eligible to vest, if at all, in four equal quarterly tranches after the grant date, subject to the Reporting Person's continued service with the Issuer through vesting.

SEC source: 0001415889-23-011350 · form4-07192023_100702.xml · nonDerivative · entry 1

D'Ambrosio Lance Varro · CIK 0001611745 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 13,441

F1 · shares: The reported sales were executed under a Rule 10b5-1 trading plan adopted by the Reporting Person as of September 15, 2022.

F2 · price: The shares were sold on the indicated date in a series of multiple transactions at prices ranging from $19.09 to $19.17, inclusive, per share. The price reported above reflects the weighted average sale price of the reported transaction. The Reporting Person hereby undertakes to provide, upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.

SEC source: 0001415889-23-006717 · form4-04192023_080402.xml · nonDerivative · entry 2

D'Ambrosio Lance Varro · CIK 0001611745 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 39,441

F2 · shares: The reported disposition represents a bona fide gift made by the Reporting Person.

SEC source: 0001415889-23-006717 · form4-04192023_080402.xml · nonDerivative · entry 1

D'Ambrosio Lance Varro · CIK 0001611745 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 43,441

F1 · shares: The reported sales were executed under a Rule 10b5-1 trading plan adopted by the Reporting Person as of September 15, 2022.

SEC source: 0001415889-23-001219 · form4-01192023_110125.xml · nonDerivative · entry 1

D'Ambrosio Lance Varro · CIK 0001611745 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 69,441

F1 · shares: The reported sales were executed under a Rule 10b5-1 trading plan adopted by the Reporting Person as of September 15, 2022.

F2 · price: The shares were sold on the indicated date in a series of multiple transactions at prices ranging from $6.305 to $6.55, inclusive, per share. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.

SEC source: 0001079973-22-001384 · ownership.xml · nonDerivative · entry 1

D'Ambrosio Lance Varro · CIK 0001611745 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 95,441

F1 · shares: The reported sales were executed under a Rule 10b5-1 trading plan adopted by the Reporting Person as of September 15, 2022.

F2 · price: The shares were sold on the indicated date in a series of multiple transactions at prices ranging from $6.88 to $7.06 per share. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a security holder of the Issuer, full information regarding the number of shares and prices at which the transaction was effected.

SEC source: 0001079973-22-001210 · ownership.xml · derivative · entry 3

D'Ambrosio Lance Varro · CIK 0001611745 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 6,250 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · date: On September 28, 2022, a Form 4 was filed that, due to administrative error, inadvertently disclosed incorrect information regarding the transactions, as indicated. Accordingly, this amended Form 4 is being filed to supply the correct information regarding the indicated transactions.

F2 · derivative.exercise_date: All outstanding Restricted Stock Unit awards ("RSUs") granted under the Issuer's equity plan were converted into awards of restricted shares of the Issuer's Common Stock ("RSAs"), as authorized by the Issuer's Compensation and Human Resources Committee. The RSAs awarded in connection with this conversion are subject to forfeiture and restrictions until vesting, as set forth in the RSA award agreement with the Issuer governing the award.

F2 · derivative.expiration_date: All outstanding Restricted Stock Unit awards ("RSUs") granted under the Issuer's equity plan were converted into awards of restricted shares of the Issuer's Common Stock ("RSAs"), as authorized by the Issuer's Compensation and Human Resources Committee. The RSAs awarded in connection with this conversion are subject to forfeiture and restrictions until vesting, as set forth in the RSA award agreement with the Issuer governing the award.

SEC source: 0001079973-22-001210 · ownership.xml · nonDerivative · entry 2

D'Ambrosio Lance Varro · CIK 0001611745 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 121,441

F1 · date: On September 28, 2022, a Form 4 was filed that, due to administrative error, inadvertently disclosed incorrect information regarding the transactions, as indicated. Accordingly, this amended Form 4 is being filed to supply the correct information regarding the indicated transactions.

SEC source: 0001079973-22-001210 · ownership.xml · nonDerivative · entry 1

D'Ambrosio Lance Varro · CIK 0001611745 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,000

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · date: On September 28, 2022, a Form 4 was filed that, due to administrative error, inadvertently disclosed incorrect information regarding the transactions, as indicated. Accordingly, this amended Form 4 is being filed to supply the correct information regarding the indicated transactions.

SEC source: 0001079973-22-001201 · ownership.xml · derivative · entry 3

D'Ambrosio Lance Varro · CIK 0001611745 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 6,250 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: As of September 26, 2022, all outstanding restricted stock units ("RSUs") under the Issuer's equity plan were converted into restricted shares of the Issuer's Common Stock ("Restricted Stock"). The reported transaction represents the conversion of the unvested balance of the 12,500 RSUs granted to the Reporting Person as of January 10, 2022, into 6,250 shares of Restricted Stock. Pursuant to the applicable award agreement, these 6,250 shares vest, if at all, in two equal quarterly tranches, subject to the Reporting Person's continued service through vesting.

F1 · derivative.exercise_date: As of September 26, 2022, all outstanding restricted stock units ("RSUs") under the Issuer's equity plan were converted into restricted shares of the Issuer's Common Stock ("Restricted Stock"). The reported transaction represents the conversion of the unvested balance of the 12,500 RSUs granted to the Reporting Person as of January 10, 2022, into 6,250 shares of Restricted Stock. Pursuant to the applicable award agreement, these 6,250 shares vest, if at all, in two equal quarterly tranches, subject to the Reporting Person's continued service through vesting.

F1 · derivative.expiration_date: As of September 26, 2022, all outstanding restricted stock units ("RSUs") under the Issuer's equity plan were converted into restricted shares of the Issuer's Common Stock ("Restricted Stock"). The reported transaction represents the conversion of the unvested balance of the 12,500 RSUs granted to the Reporting Person as of January 10, 2022, into 6,250 shares of Restricted Stock. Pursuant to the applicable award agreement, these 6,250 shares vest, if at all, in two equal quarterly tranches, subject to the Reporting Person's continued service through vesting.

F1 · derivative.underlying_shares: As of September 26, 2022, all outstanding restricted stock units ("RSUs") under the Issuer's equity plan were converted into restricted shares of the Issuer's Common Stock ("Restricted Stock"). The reported transaction represents the conversion of the unvested balance of the 12,500 RSUs granted to the Reporting Person as of January 10, 2022, into 6,250 shares of Restricted Stock. Pursuant to the applicable award agreement, these 6,250 shares vest, if at all, in two equal quarterly tranches, subject to the Reporting Person's continued service through vesting.

F2 · balance_after: Represents the total direct and indirect beneficial ownership of the indicated security held by the Reporting Person immediately following the reported transaction.

SEC source: 0001079973-22-001201 · ownership.xml · nonDerivative · entry 2

D'Ambrosio Lance Varro · CIK 0001611745 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 121,441

F3 · shares: As of September 26, 2022, the Reporting Person was granted, in consideration of the his service as an independent member of the Board, an award of 111,441 shares of Restricted Stock pursuant to a Restricted Stock award agreement with the Issuer under the equity plan. These 111,441 shares are eligible to vest, if at all, in four equal quarterly tranches after the grant date, subject to the Reporting Person's continued service with the Issuer through vesting.

F3 · price: As of September 26, 2022, the Reporting Person was granted, in consideration of the his service as an independent member of the Board, an award of 111,441 shares of Restricted Stock pursuant to a Restricted Stock award agreement with the Issuer under the equity plan. These 111,441 shares are eligible to vest, if at all, in four equal quarterly tranches after the grant date, subject to the Reporting Person's continued service with the Issuer through vesting.

F2 · balance_after: Represents the total direct and indirect beneficial ownership of the indicated security held by the Reporting Person immediately following the reported transaction.

SEC source: 0001079973-22-001201 · ownership.xml · nonDerivative · entry 1

D'Ambrosio Lance Varro · CIK 0001611745 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,000

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: As of September 26, 2022, all outstanding restricted stock units ("RSUs") under the Issuer's equity plan were converted into restricted shares of the Issuer's Common Stock ("Restricted Stock"). The reported transaction represents the conversion of the unvested balance of the 12,500 RSUs granted to the Reporting Person as of January 10, 2022, into 6,250 shares of Restricted Stock. Pursuant to the applicable award agreement, these 6,250 shares vest, if at all, in two equal quarterly tranches, subject to the Reporting Person's continued service through vesting.

F1 · price: As of September 26, 2022, all outstanding restricted stock units ("RSUs") under the Issuer's equity plan were converted into restricted shares of the Issuer's Common Stock ("Restricted Stock"). The reported transaction represents the conversion of the unvested balance of the 12,500 RSUs granted to the Reporting Person as of January 10, 2022, into 6,250 shares of Restricted Stock. Pursuant to the applicable award agreement, these 6,250 shares vest, if at all, in two equal quarterly tranches, subject to the Reporting Person's continued service through vesting.

F2 · balance_after: Represents the total direct and indirect beneficial ownership of the indicated security held by the Reporting Person immediately following the reported transaction.

SEC source: 0001553350-22-000738 · ownership.xml · nonDerivative · entry 1

D'Ambrosio Lance Varro · CIK 0001611745 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,750

F1 · price: Represents the average sales price per share of the shares sold by the Reporting Person on September 1, 2022 in multiple transactions at prevailing market prices ranging from $6.68 to $6.69 per share, inclusive. The Reporting Person hereby undertakes, upon request, to provide the Issuer, any security holder of the Issuer, or the staff of the U.S. Securities and Exchange Commission, as applicable, full information regarding the number and price of shares sold by the Reporting Person in each transaction covered by this Report.

SEC source: 0001079973-22-001053 · ownership.xml · derivative · entry 2

D'Ambrosio Lance Varro · CIK 0001611745 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,250

Underlying: Common Stock · 11,250 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: These Restricted Stock Units ("RSUs") were granted to the Reporting Person under the Riot Blockchain, Inc. 2019 Equity Incentive Plan, as amended, (the "Plan") in consideration of the Reporting Person's service on the Issuer's Board of Directors, subject to the Reporting Person's continuing service with the Issuer through the applicable vesting date. RSUs granted under the Plan are subject to forfeiture until vested. Following vesting, RSUs are convertible, on a one-for-one basis, into shares of the Issuer's Common Stock upon settlement by the Issuer in accordance with the procedures of the Plan.

F1 · price: These Restricted Stock Units ("RSUs") were granted to the Reporting Person under the Riot Blockchain, Inc. 2019 Equity Incentive Plan, as amended, (the "Plan") in consideration of the Reporting Person's service on the Issuer's Board of Directors, subject to the Reporting Person's continuing service with the Issuer through the applicable vesting date. RSUs granted under the Plan are subject to forfeiture until vested. Following vesting, RSUs are convertible, on a one-for-one basis, into shares of the Issuer's Common Stock upon settlement by the Issuer in accordance with the procedures of the Plan.

F3 · derivative.exercise_date: The conversion reported in Table II represents the settlement by the Issuer following vesting of 11,250 RSUs, including: (i) the final 5,000 of the 12,500 RSUs granted to the Reporting Person as of May 28, 2021, of which, 2,500 vested immediately as of the grant date, with the remaining vesting in four equal quarterly installments following the grant date; and (ii) 6,250 of the 12,500 RSUs granted to the Reporting Person as of January 10, 2022, which are eligible to vest in four equal quarterly installments following the grant date, subject to the Reporting Person's continued service with the Issuer through the applicable vesting date.

F3 · derivative.expiration_date: The conversion reported in Table II represents the settlement by the Issuer following vesting of 11,250 RSUs, including: (i) the final 5,000 of the 12,500 RSUs granted to the Reporting Person as of May 28, 2021, of which, 2,500 vested immediately as of the grant date, with the remaining vesting in four equal quarterly installments following the grant date; and (ii) 6,250 of the 12,500 RSUs granted to the Reporting Person as of January 10, 2022, which are eligible to vest in four equal quarterly installments following the grant date, subject to the Reporting Person's continued service with the Issuer through the applicable vesting date.

F2 · balance_after: Represents the total direct and indirect beneficial ownership of the indicated security held by the Reporting Person immediately following the reported transaction.

SEC source: 0001079973-22-001053 · ownership.xml · nonDerivative · entry 1

D'Ambrosio Lance Varro · CIK 0001611745 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 13,750

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: These Restricted Stock Units ("RSUs") were granted to the Reporting Person under the Riot Blockchain, Inc. 2019 Equity Incentive Plan, as amended, (the "Plan") in consideration of the Reporting Person's service on the Issuer's Board of Directors, subject to the Reporting Person's continuing service with the Issuer through the applicable vesting date. RSUs granted under the Plan are subject to forfeiture until vested. Following vesting, RSUs are convertible, on a one-for-one basis, into shares of the Issuer's Common Stock upon settlement by the Issuer in accordance with the procedures of the Plan.

F2 · balance_after: Represents the total direct and indirect beneficial ownership of the indicated security held by the Reporting Person immediately following the reported transaction.

SEC source: 0001079973-22-000303 · ownership.xml · derivative · entry 2

D'Ambrosio Lance Varro · CIK 0001611745 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 17,500

Underlying: Common Stock · 2,500 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Vested restricted stock units ("RSUs") granted under the Riot Blockchain, Inc. 2019 Equity Incentive Plan (the "Plan") covert into shares of the Issuer's common stock, no par value per share, (the "Common Stock") on a one-for-one basis, subject to any net settlement permitted by the Plan and approved by the Issuer's Compensation and Human Resources Committee (the "Committee") upon settlement by the Issuer in accordance with the procedures of the Plan.

F1 · price: Vested restricted stock units ("RSUs") granted under the Riot Blockchain, Inc. 2019 Equity Incentive Plan (the "Plan") covert into shares of the Issuer's common stock, no par value per share, (the "Common Stock") on a one-for-one basis, subject to any net settlement permitted by the Plan and approved by the Issuer's Compensation and Human Resources Committee (the "Committee") upon settlement by the Issuer in accordance with the procedures of the Plan.

F3 · derivative.exercise_date: The conversion of 2,500 vested RSUs reported in Table II relates to the settlement by the Issuer of the vested portion of the 12,500 RSUs granted under the Plan to the Reporting Person as of the grant date, May 28, 2021 as compensation for the Reporting Person's service as a member of the Issuer's Board of Directors for Fiscal Year 2021. Of these 12,500 RSUs, 2,500 RSUs vested immediately as of the grant date, with the remaining 10,000 RSUs eligible to vest in four quarterly installments of 2,500 RSUs after the grant date.

F3 · derivative.expiration_date: The conversion of 2,500 vested RSUs reported in Table II relates to the settlement by the Issuer of the vested portion of the 12,500 RSUs granted under the Plan to the Reporting Person as of the grant date, May 28, 2021 as compensation for the Reporting Person's service as a member of the Issuer's Board of Directors for Fiscal Year 2021. Of these 12,500 RSUs, 2,500 RSUs vested immediately as of the grant date, with the remaining 10,000 RSUs eligible to vest in four quarterly installments of 2,500 RSUs after the grant date.

F2 · balance_after: Represents the total direct and indirect ownership of the indicated security held by the Reporting Person immediately following the reported transaction.

SEC source: 0001079973-22-000303 · ownership.xml · nonDerivative · entry 1

D'Ambrosio Lance Varro · CIK 0001611745 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,500

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: Vested restricted stock units ("RSUs") granted under the Riot Blockchain, Inc. 2019 Equity Incentive Plan (the "Plan") covert into shares of the Issuer's common stock, no par value per share, (the "Common Stock") on a one-for-one basis, subject to any net settlement permitted by the Plan and approved by the Issuer's Compensation and Human Resources Committee (the "Committee") upon settlement by the Issuer in accordance with the procedures of the Plan.

F2 · balance_after: Represents the total direct and indirect ownership of the indicated security held by the Reporting Person immediately following the reported transaction.

SEC source: 0001079973-22-000050 · ownership.xml · derivative · entry 1

D'Ambrosio Lance Varro · CIK 0001611745 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 20,000

Underlying: Common Stock · 12,500 shares

Expires not disclosed

F1 · derivative.exercise_price: Vested restricted stock units ("RSUs") granted under the Riot Blockchain, Inc. 2019 Equity Incentive Plan, as amended, (the "Plan") covert into shares of the Issuer's Common Stock, no par value per share, on a one-for-one basis upon settlement by the Issuer in accordance with the procedures of the Plan

F2 · price: These 12,500 RSUs were awarded as compensation for the Reporting Person's service as an independent director on the Issuer's Board of Directors for the year ending December 31, 2022, as approved by the Issuer's Compensation and Human Resources Committee on January 10, 2022. These 12,500 RSUs are eligible to vest in four equal quarterly installments of 3,125 RSUs following the grant date.

F2 · derivative.exercise_date: These 12,500 RSUs were awarded as compensation for the Reporting Person's service as an independent director on the Issuer's Board of Directors for the year ending December 31, 2022, as approved by the Issuer's Compensation and Human Resources Committee on January 10, 2022. These 12,500 RSUs are eligible to vest in four equal quarterly installments of 3,125 RSUs following the grant date.

F2 · derivative.expiration_date: These 12,500 RSUs were awarded as compensation for the Reporting Person's service as an independent director on the Issuer's Board of Directors for the year ending December 31, 2022, as approved by the Issuer's Compensation and Human Resources Committee on January 10, 2022. These 12,500 RSUs are eligible to vest in four equal quarterly installments of 3,125 RSUs following the grant date.

F3 · balance_after: Represents the total direct and indirect beneficial ownership of the security held by the Reporting Person immediately following the issuance reported by this Form 4.

SEC source: 0001079973-21-001247 · ownership.xml · nonDerivative · entry 1

D'Ambrosio Lance Varro · CIK 0001611745 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

F1 · price: The price reported in Column 4 is an average price of the shares of the Common Stock, no par value per share, (the "Shares") of Riot Blockchain, Inc. (the "Issuer") sold by the Reporting Person in multiple transactions on the indicated date at prices ranging from $24.95 per Share, to $25.03 per Share, inclusive. The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the United States Securities and Exchange Commission, upon request, full information regarding the number of Shares sold at each separate price within the range set forth in this footnote (1) to this Report.

SEC source: 0001079973-21-001211 · ownership.xml · derivative · entry 2

D'Ambrosio Lance Varro · CIK 0001611745 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,500

Underlying: Common Stock · 5,000 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Vested restricted stock units ("RSUs") granted under the Riot Blockchain, Inc. 2019 Equity Incentive Plan (the "Plan") covert into shares of the Issuer's common stock, no par value per share, (the "Common Stock") on a one-for-one basis, subject to any net settlement permitted by the Plan and approved by the Issuer's Compensation and Human Resources Committee (the "Committee") upon settlement by the Issuer in accordance with the procedures of the Plan.

F1 · price: Vested restricted stock units ("RSUs") granted under the Riot Blockchain, Inc. 2019 Equity Incentive Plan (the "Plan") covert into shares of the Issuer's common stock, no par value per share, (the "Common Stock") on a one-for-one basis, subject to any net settlement permitted by the Plan and approved by the Issuer's Compensation and Human Resources Committee (the "Committee") upon settlement by the Issuer in accordance with the procedures of the Plan.

F3 · derivative.exercise_date: The conversion of 5,000 vested RSUs reported in Table II relates to the settlement by the Issuer of the vested portion of the 12,500 RSUs granted under the Plan to the Reporting Person on May 28, 2021. Of the 12,500 RSUs awarded to the Reporting Person, 2,500 RSUs vested immediately as of the grant date, with the remaining 10,000 RSUs eligible to vest in four quarterly installments after the grant date.

F3 · derivative.expiration_date: The conversion of 5,000 vested RSUs reported in Table II relates to the settlement by the Issuer of the vested portion of the 12,500 RSUs granted under the Plan to the Reporting Person on May 28, 2021. Of the 12,500 RSUs awarded to the Reporting Person, 2,500 RSUs vested immediately as of the grant date, with the remaining 10,000 RSUs eligible to vest in four quarterly installments after the grant date.

F2 · balance_after: Represents the total direct and indirect ownership of the indicated security held by the Reporting Person immediately following the reported ansaction.

SEC source: 0001079973-21-001211 · ownership.xml · nonDerivative · entry 1

D'Ambrosio Lance Varro · CIK 0001611745 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,000

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Vested restricted stock units ("RSUs") granted under the Riot Blockchain, Inc. 2019 Equity Incentive Plan (the "Plan") covert into shares of the Issuer's common stock, no par value per share, (the "Common Stock") on a one-for-one basis, subject to any net settlement permitted by the Plan and approved by the Issuer's Compensation and Human Resources Committee (the "Committee") upon settlement by the Issuer in accordance with the procedures of the Plan.

F2 · balance_after: Represents the total direct and indirect ownership of the indicated security held by the Reporting Person immediately following the reported ansaction.

SEC source: 0001079973-21-000446 · ownership.xml · derivative · entry 1

D'Ambrosio Lance Varro · CIK 0001611745 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 12,500

Underlying: Common Shares · 12,500 shares

Expires not disclosed

F1 · derivative.exercise_price: Vested restricted stock units ("RSUs") granted under the Riot Blockchain, Inc. 2019 Equity Incentive Plan (the "Plan") covert into shares of the Issuer's Common Stock on a one-for-one basis upon settlement by the Issuer in accordance with the procedures of the Plan.

F2 · price: On May 28, 2021, in connection with the Reporting Person's service as a director of the Corporation and upon the satisfaction of the requirements of the applicable award agreement, the Reporting Person was granted an award of 12,500 RSUs under the Plan, with 2,500 RSUs vested immediately as of the grant date, and with the remaining 10,000 RSUs eligible to vest in four (4) equal quarterly installments following the grant date.

F2 · derivative.exercise_date: On May 28, 2021, in connection with the Reporting Person's service as a director of the Corporation and upon the satisfaction of the requirements of the applicable award agreement, the Reporting Person was granted an award of 12,500 RSUs under the Plan, with 2,500 RSUs vested immediately as of the grant date, and with the remaining 10,000 RSUs eligible to vest in four (4) equal quarterly installments following the grant date.

F2 · derivative.expiration_date: On May 28, 2021, in connection with the Reporting Person's service as a director of the Corporation and upon the satisfaction of the requirements of the applicable award agreement, the Reporting Person was granted an award of 12,500 RSUs under the Plan, with 2,500 RSUs vested immediately as of the grant date, and with the remaining 10,000 RSUs eligible to vest in four (4) equal quarterly installments following the grant date.

F3 · balance_after: Represents the total direct and indirect beneficial ownership of the security held by the Reporting Person immediately following the issuance reported by this Form 4.