|   | ☒ | ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 |
|--------|---------|------------------------------------------------------------------------------------------------|
|   | ☐ | TRANSITION REPORT UNDER SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 |
|--------|---------|----------------------------------------------------------------------------------------------|

|   | RIOT BLOCKCHAIN, INC.                                  |   |
|--------|--------------------------------------------------------|--------|
|   | (Exact name of registrant as specified in its charter) |   |

| Nevada                                                         |   | 84-155336                            |
|----------------------------------------------------------------|--------|--------------------------------------|
| (State or other jurisdiction of Incorporation or organization) |   | (I.R.S. Employer Identification No.) |
| 202 6th Street, Suite 401Castle Rock, CO |   | 80104      |
|------------------------------------------|--------|------------|
| (Address of principal executive offices) |   | (Zip Code) |
| Common Stock no par value per share |   | The NASDAQ Stock Market LLC                                               |
|-------------------------------------|--------|---------------------------------------------------------------------------|
| (Title of class)          |   | (Name of each exchange on which registered) |
| Large accelerated filer ☐                                                    |   |   | Accelerated filer ☐              |
|------------------------------------------------------------------------------------|--------|--------|----------------------------------------|
|                                                                               |   |   |                                   |
| Non-accelerated filer ☐                                                      |   |   | Smaller reporting company ☒ |
| (Do not check if a smaller reporting company) Emerging growth company ☐ |   |   |                                   |

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|     | Page                                                                                                          |
|----------|---------------------------------------------------------------------------------------------------------------|
| PART I   |                                                                                                          |
|     |                                                                                                          |   |
| Item 1.  | Business.                                                                                                     | 3 |
| Item 1A. | Risk Factors.                                                                                                 | 10 |
| Item 1B. | Unresolved Staff Comments.                                                                                    | 32 |
| Item 2.  | Properties.                                                                                                   | 32 |
| Item 3.  | Legal Proceedings.                                                                                            | 33 |
| Item 4.  | Mine Safety Disclosures                                                                                       | 33 |
|     |                                                                                                          |   |
| PART II  |                                                                                                          |
|     |                                                                                                          |   |
| Item 5.  | Market for Registrant's Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities. | 34 |
| Item 6.  | Selected Financial Data.                                                                                      | 35 |
| Item 7.  | Management's Discussion and Analysis of Financial Condition and Results of Operations.                        | 35 |
| Item 7A. | Quantitative and Qualitative Disclosures About Market Risk.                                                   | 41 |
| Item 8.  | Financial Statements and Supplementary Data.                                                                  | 41 |
| Item 9.  | Changes in and Disagreements with Accountants on Accounting and Financial Disclosure.                         | 42 |
| Item 9A. | Controls and Procedures.                                                                                      | 42 |
| Item 9B. | Other Information.                                                                                            | 43 |
|     |                                                                                                          |   |
| PART III |                                                                                                          |
|     |                                                                                                          |   |
| Item 10. | Directors, Executive Officers and Corporate Governance.                                                       | 44 |
| Item 11. | Executive Compensation.                                                                                       | 48 |
| Item 12. | Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters.               | 51 |
| Item 13. | Certain Relationships and Related Transactions, and Director Independence.                                    | 52 |
| Item 14. | Principal Accountant Fees and Services.                                                                       | 53 |
|     |                                                                                                          |   |
| PART IV  |                                                                                                          |
|     |                                                                                                          |   |
| Item 15. | Exhibits, Financial Statement Schedules.                                                                      | 54 |

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| · | The uncertainty of profitability; |
|--------|-----------------------------------|

| · | High volatility in the value attributable to our business model and assets; |
|--------|-----------------------------------------------------------------------------|

| · | Rapid change in the regulatory and legal environment in which we operate with many unknown future challenges to operating our business in a lawful manner or which will require our business or the businesses in which we invest to be subjected to added costs and/or uncertainty regarding the ability to operate; |
|--------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| · | Risks related to failure to obtain adequate financing on a timely basis and on acceptable terms; and |
|--------|------------------------------------------------------------------------------------------------------|

| · | Other risks and uncertainties related to our business plan and business strategy. |
|--------|-----------------------------------------------------------------------------------|

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|  | · | Acting as a fraud deterrent, as cryptocurrencies are digital and cannot be counterfeited or reversed arbitrarily by a sender; |
|--|--------|-------------------------------------------------------------------------------------------------------------------------------|

|  | · | Immediate settlement; |
|--|--------|-----------------------|

|  | · | Elimination of counterparty risk; |
|--|--------|-----------------------------------|

|  | · | No trusted intermediary required; |
|--|--------|-----------------------------------|

|  | · | Lower fees; |
|--|--------|-------------|

|  | · | Identity theft prevention; |
|--|--------|----------------------------|

|  | · | Accessible by everyone; |
|--|--------|-------------------------|

|  | · | Transactions are verified and protected through a confirmation process, which prevents the problem of double spending; |
|--|--------|------------------------------------------------------------------------------------------------------------------------|

|  | · | Decentralized – no central authority (government or financial institution); and |
|--|--------|---------------------------------------------------------------------------------------|

|  | · | Recognized universally and not bound by government imposed or market exchange rates. |
|--|--------|--------------------------------------------------------------------------------------|

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|  | · | Overstock.com Inc |
|--|--------|-------------------|

|  | · | Bitcoin Investment Trust |
|--|--------|--------------------------|

|  | · | Blockchain Mining Ltd |
|--|--------|-----------------------|

|  | · | DMG Blockchain Solutions |
|--|--------|--------------------------|

|  | · | Hashchain Technology Inc |
|--|--------|--------------------------|

|  | · | Hive Blockchain Technologies Inc |
|--|--------|----------------------------------|

|  | · | Hut 8 Mining Corp |
|--|--------|-------------------|

|  | · | MGT Capital Investments Inc |
|--|--------|-----------------------------|

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|  | Ø | Gemini |
|--|--------|--------|

|  | Ø | Coinbase |
|--|--------|----------|

|  | Ø | Itbit |
|--|--------|-------|

|  | Ø | Kraken |
|--|--------|--------|

|  | Ø | Poloniex / Circle |
|--|--------|-------------------|

|  | Ø | Bittrex |
|--|--------|---------|

|  | Ø | Bitstamp |
|--|--------|----------|

|  | Ø | Binance |
|--|--------|---------|

|  | Ø | Houbi |
|--|--------|-------|

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|  | · | exposure to local economic conditions; |
|--|--------|----------------------------------------|

|  | · | potential adverse changes in the diplomatic relations of foreign countries with the U.S.; |
|--|--------|-------------------------------------------------------------------------------------------|

|  | · | hostility from local populations; |
|--|--------|-----------------------------------|

|  | · | restrictions and taxes on the withdrawal of foreign investments and earnings; |
|--|--------|-------------------------------------------------------------------------------|

|  | · | imposition of government policies and regulations against business and energy usage by foreigners; |
|--|--------|----------------------------------------------------------------------------------------------------|

|  | · | foreign investment restrictions or requirements; |
|--|--------|--------------------------------------------------|

|  | · | limitations on our ability to legally enforce our contractual rights in foreign countries; |
|--|--------|--------------------------------------------------------------------------------------------|

|  | · | lack of protection of intellectual property rights; |
|--|--------|-----------------------------------------------------|

|  | · | regulations prohibiting or restricting the mining or exchange of cryptocurrencies; |
|--|--------|------------------------------------------------------------------------------------|

|  | · | conflicts between local laws and U.S. laws; |
|--|--------|---------------------------------------------|

|  | · | exposure to currency fluctuations; |
|--|--------|------------------------------------|

|  | · | withholding and other taxes on remittances and other payments by our subsidiaries; and |
|--|--------|----------------------------------------------------------------------------------------|

|  | · | changes in and application of foreign taxation structures. |
|--|--------|------------------------------------------------------------|

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|  | · | the presence of construction or repair defects or other structural or building damage; |
|--|--------|----------------------------------------------------------------------------------------|

|  | · | any noncompliance with or liabilities under applicable environmental, health or safety regulations or requirements or building permit requirements; |
|--|--------|-----------------------------------------------------------------------------------------------------------------------------------------------------|

|  | · | any damage resulting from natural disasters, such as hurricanes, earthquakes, fires, floods and windstorms; and |
|--|--------|-----------------------------------------------------------------------------------------------------------------|

|  | · | claims by employees and others for injuries sustained at our properties. |
|--|--------|--------------------------------------------------------------------------|

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|  | · | continued worldwide growth in the adoption and use of cryptocurrencies; |
|--|--------|-------------------------------------------------------------------------|

|  | · | governmental and quasi-governmental regulation of cryptocurrencies and their use, or restrictions on or regulation of access to and operation of the network or similar cryptocurrency systems; |
|--|--------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|  | · | changes in consumer demographics and public tastes and preferences; |
|--|--------|---------------------------------------------------------------------|

|  | · | the maintenance and development of the open-source software protocol of the network; |
|--|--------|--------------------------------------------------------------------------------------|

|  | · | the availability and popularity of other forms or methods of buying and selling goods and services, including new means of using fiat currencies; |
|--|--------|---------------------------------------------------------------------------------------------------------------------------------------------------|

|  | · | the use of the networks supporting cryptocurrencies for developing smart contracts and distributed applications; |
|--|--------|------------------------------------------------------------------------------------------------------------------|

|  | · | general economic conditions and the regulatory environment relating to digital assets; and |
|--|--------|--------------------------------------------------------------------------------------------|

|  | · | negative consumer sentiment and perception of bitcoin specifically and cryptocurrencies generally. |
|--|--------|----------------------------------------------------------------------------------------------------|

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|  | · | actual or anticipated fluctuations in our financial condition and operating results or those of companies perceived to be similar to us; |
|--|--------|------------------------------------------------------------------------------------------------------------------------------------------|

|  | · | actual or anticipated changes in our growth rate relative to our competitors; |
|--|--------|-------------------------------------------------------------------------------|

|  | · | commercial success and market acceptance of blockchain and bitcoin and other cryptocurrencies; |
|--|--------|------------------------------------------------------------------------------------------------|

|  | · | actions by our competitors, such as new business initiatives, acquisitions and divestitures; |
|--|--------|----------------------------------------------------------------------------------------------|

|  | · | strategic transactions undertaken by us; |
|--|--------|------------------------------------------|

|  | · | additions or departures of key personnel; |
|--|--------|-------------------------------------------|

|  | · | prevailing economic conditions; |
|--|--------|---------------------------------|

|  | · | disputes concerning our intellectual property or other proprietary rights; |
|--|--------|----------------------------------------------------------------------------|

|  | · | sales of our common stock by our officers, directors or significant shareholders; |
|--|--------|-----------------------------------------------------------------------------------|

|  | · | other actions taken by our shareholders |
|--|--------|-----------------------------------------|

|  | · | future sales or issuances of equity or debt securities by us; |
|--|--------|---------------------------------------------------------------|

|  | · | business disruptions caused by earthquakes, tornadoes or other natural disasters; |
|--|--------|-----------------------------------------------------------------------------------|

|  | · | issuance of new or changed securities analysts' reports or recommendations regarding us; |
|--|--------|------------------------------------------------------------------------------------------|

|  | · | legal proceedings involving our company, our industry or both; |
|--|--------|----------------------------------------------------------------|

|  | · | changes in market valuations of companies similar to ours; |
|--|--------|------------------------------------------------------------|

|  | · | the prospects of the industry in which we operate; |
|--|--------|----------------------------------------------------|

|  | · | speculation or reports by the press or investment community with respect to us or our industry in general; |
|--|--------|------------------------------------------------------------------------------------------------------------|

|  | · | the level of short interest in our stock; and |
|--|--------|-----------------------------------------------|

|  | · | other risks, uncertainties and factors described in this annual report. |
|--|--------|-------------------------------------------------------------------------|

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| Quarter ended      |   | High   |   |   | Low    |   |
|--------------------|--------|--------|--------|--------|--------|--------|
|               |   |   |   |   |   |   |
| March 31, 2016     |   | $      | 2.70   |   |   | $      | 1.62 |   |
| June 30, 2016      |   | $      | 4.43   |   |   | $      | 2.63 |   |
| September 30, 2016 |   | $      | 4.54   |   |   | $      | 2.94 |   |
| December 31, 2016  |   | $      | 4.40   |   |   | $      | 2.31 |   |
| March 31, 2017     |   | $      | 4.38   |   |   | $      | 3.08 |   |
| June 30, 2017      |   | $      | 4.18   |   |   | $      | 3.42 |   |
| September 30, 2017 |   | $      | 5.16   |   |   | $      | 3.48 |   |
| December 31, 2017  |   | $      | 38.60  |   |   | $      | 6.45 |   |
| Plan Category                                                   |   | Number of securities to be issued upon exercise of outstanding options |    |   | Weighted average exercise price of outstanding options |   |    | Number of securities remaining available for future issuance |   |
|-----------------------------------------------------------------|--------|------------------------------------------------------------------------|---------|--------|--------------------------------------------------------|--------|---------|--------------------------------------------------------------|--------|
|                                                            |   |                                                                   |    |   |                                                   |   |    |                                                         |   |
| Equity compensation plans approved by security holders     |   |                                                                   | 119,533 |   |                                                   | $      | 9.02    |                                                         |   |   | 329,000 |   |
|                                                            |   |                                                                   |    |   |                                                   |   |    |                                                         |   |   |   |   |
| Equity compensation plans not approved by security holders |   |                                                                   | — |   |                                                   |   | — |                                                         |   |   | — |   |
|                                                            |   |                                                                   |    |   |                                                   |   |    |                                                         |   |   |   |   |
| Total                                                           |   |                                                                   | 119,533 |   |                                                   | $      | 9.02    |                                                         |   |   | 329,000 |   |

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|   | •  | Continuing expansion of cryptocurrency mining operations;                                                              |
|--------|---------------|------------------------------------------------------------------------------------------------------------------------|
|   | •       | Continuing to evaluate opportunities for investments in the blockchain and digital currency sector;     |
|   | •       | Exploring other possible strategic options and financing opportunities available to the Company;                       |
|   | •       | Investigating the launch of a digital asset exchange in the United States; and                                         |
|   | •       | Evaluating options to monetize, partner or license the Company's assets, including the appendicitis product portfolio. |

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|   | • |   | Pertain to the maintenance of records that in reasonable detail accurately and fairly reflect the transactions and dispositions of our assets;                                                                                                                                        |
|--------|---------|--------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|   | • |   | Provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with GAAP, and that our receipts and expenditures are being made only in accordance with authorizations of our management and our directors; and |
|   | • |   | Provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use or disposition of our assets that could have a material effect on the financial statements.                                                                                    |

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| Name                 |   | Age    |   | Position                                                  |
|----------------------|--------|--------|--------|-----------------------------------------------------------|
|                 |   |   |   |                                                      |
| John R. O'Rourke     |   | 32     |   | Chief Executive Officer, President, Director and Chairman |
| Remo Mancini         |   | 66     |   | Lead Director                                             |
| Andrew J. Kaplan     |   | 50     |   | Director                                                  |
| Jason Les            |   | 32     |   | Director                                                  |
| Robby Chang          |   | 40     |   | Chief Financial Officer                                   |
| Christopher Ensey    |   | 37     |   | Chief Operating Officer                                   |
| Jeffrey G. McGonegal |   | 67     |   | Principal Accounting Officer and Secretary                |

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|   | ● | appointing; approving the compensation of; overseeing the work of; and assessing the independence, qualifications, and performance of the independent auditor;            |
|--------|---------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|   | ● | reviewing the internal audit function, including its independence, plans, and budget;                                                                                     |
|   | ● | approving, in advance, audit and any permissible non-audit services performed by our independent auditor;                                                                 |
|   | ● | reviewing our internal controls with the independent auditor and management;                                                                                              |
|   | ● | reviewing the adequacy of our accounting and financial controls as reported by the independent auditor and management;                                                    |
|   | ● | overseeing our financial compliance system; and                                                                                                                           |
|   | ● | overseeing our major risk exposures regarding our accounting and financial reporting policies, the activities of our internal audit function, and information technology. |

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|   | ● | reviewing and making recommendations to the Board with respect to the compensation of our officers and directors, including the CEO;               |
|--------|---------|----------------------------------------------------------------------------------------------------------------------------------------------------|
|   | ● | overseeing and administering the Company's executive compensation plans, including equity-based awards;                                            |
|   | ● | negotiating and overseeing employment agreements with officers and directors; and                                                                  |
|   | ● | overseeing how the Company's compensation policies and practices may affect the Company's risk management practices and/or risk-taking incentives. |
|   | ● | reviewing and assessing the development of the executive officers, and considering and making recommendations to the Board regarding promotion and succession issues;                                                                 |
|--------|---------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|   | ● | evaluating and reporting to the Board on the performance and effectiveness of the directors, committees, and the Board as a whole;                                                                                                    |
|   | ● | working with the Board to determine the appropriate and desirable mix of characteristics, skills, expertise, and experience, including diversity considerations, for the full Board and each committee;                               |
|   | ● | annually presenting to the Board a list of individuals recommended to be nominated for election to the Board;                                                                                                                         |
|   | ● | reviewing, evaluating, and recommending changes to the Company's Corporate Governance Principles and committee Charters;                                                                                                              |
|   | ● | recommending to the Board individuals to be elected to fill vacancies and newly created directorships;                                                                                                                                |
|   | ● | overseeing the Company's compliance program, including the Code of Conduct; and                                                                                                                                                       |
|   | ● | overseeing and evaluating how the Company's corporate governance and legal and regulatory compliance policies and practices, including leadership, structure, and succession planning, may affect the Company's major risk exposures. |

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| Named Executive Officer and Principal Position                 |  Year |    | Salary($) |      | Stock Awards (5) ($) |    | Option Awards(6)($) |      | Non-Equity Incentive Plan Compensation(7)($) |   | All OtherCompensation($) |   | Total($) |
|----------------------------------------------------------------|------------|---------|-----------|-----------|----------------------|---------|---------------------|-----------|----------------------------------------------|--------|--------------------------|--------|----------|
|                                                           |       |    |      |      |                 |    |                |      |                                         |   |                     |   |     |   |
| John R. O'Rourke, Chief Executive Officer and President (1)    | 2017       | 60,000  |      | 2,322,000 | 609,842              | -       | -                   | 2,991,842 |
|                                                           |       |    |      |      |                 |    |                |      |
| Michael M. Beeghley, Chief Executive Officer (former) (2) | 2017       | 9,000   |      | 270,000   | 60,739               | -       | -                   | 339,739   |
|                                                           |       |    |      |      |                 |    |                |      |
| Stephen T. Lundy,                                              | 2017       | 111,881 |      | 62,600    | -                    | -       | 544,692             | 719,173   |
| Chief Executive Officer and President (former) (3)        | 2016       | 382,525 |      |      | 183,273              | 191,263 | 61,098              | 818,159   |
|                                                           |       |    |      |      |                 |    |                |      |
| Jeffrey G. McGonegal,                                          | 2017       | 272,005 |      | 127,800   | -                    | 140,000 | 169,843             | 709,648   |
| Chief Financial Officer (former) (4)                           | 2016       | 272,005 |      |      | 89,506               | 136,003 | 16,111              | 513,625   |

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|                           | Option Awards                                                      |   | Stock Awards                                                         |   |
|--------------------------------|--------------------------------------------------------------------|--------|----------------------------------------------------------------------|--------|
| Named Executive Officer        | Number of Securities Underlying Unexercised Options Exercisable(#) |   | Number of Securities Underlying Unexercised Options Unexercisable(#) |   | Equity IncentivePlan Awards:Number of Securities Underlying Unexercised Unearned Options (#) |   | OptionExercisePrice($) |   | OptionExpirationDate |   | Number of Shares or Units of Stock That Have Not Vested (#) |   | Market Value of Shares or Units of Stock That Have Not Vested ($) |   | Number of Stock Options Held at Fiscal  Year-End (#) |   | Number of Shares of Restricted Stock Held at Fiscal  Year-End (#) |   |
|                           |                                                               |   |                                                                 |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| John R. O'Rourke (1)           |                                                               |   | 100,000                                                              |   |   |   | - |   |   |   | - |   |   |   | 10.00 |   |   |   | 11-2-2027 |   |   |   | 440,709 |   |   |   | 12,516,136 |   |   |   | 100,000 |   |   |   | 464,417 |   |
|                           |                                                               |   |                                                                 |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
|                           |                                                               |   |                                                                 |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
|  Jeffrey G. McGonegal (2) |                                                               |   | -                                                                    |   |   |   | - |   |   |   | - |   |   |   | - |   |   |   | - |   |   |   | 22,858 |   |   |   | 649,167 |   |   |   | - |   |   |   | 25,000 |   |
|                           |                                                               |   |                                                                 |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |

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| Named Executive Officer |   | Benefit                  |   | Terminationwithout Cause($) |   | Death orDisability($) |   | Change In Control(Single Trigger)($)  (1) |   | Change In Control(Double Trigger)($) |
|-------------------------|--------|--------------------------|--------|-----------------------------|--------|-----------------------|--------|------------------------------------------------|--------|--------------------------------------|
|                    |   |                     |   |                        |   |                  |   |                                           |   |                                 |
| John R. O'Rourke        |   | Severance                |   | 550,000                     |   | -                     |   | -                                              |   | 550,000                              |
|                    |   | Restricted Common Shares |   | -                           |   | -                     |   | 12,516,136                                     |   | 12,516,136                           |
|                    |   | Options                  |   | -                           |   | -                     |   | -                                              |   | -                                    |
|                    |   | Total                    |   | 550,000                     |   | -                     |   | 12,516,136                                     |   | 13,066,136                           |
|                    |   |                     |   |                        |   |                  |   |                                           |   |                                 |
| Jeffrey G. McGonegal    |   | Severance                |   | 90,668                      |   | 90,668                |   | -                                              |   | 90,668                               |
|                    |   | Restricted Common Shares |   | -                           |   | -                     |   | 649,167                                        |   | 649,167                              |
|                    |   | Options                  |   | -                           |   | -                     |   | -                                              |   | -                                    |
|                    |   | Total                    |   | 90,668                      |   | 90,668                |   | 649,167                                        |   | 739,835                              |
| Name                               |   | CashFees($) |   |   | StockAwards($) (8) |   |    | OptionAwards($) |   |   | Total($) |   |
|------------------------------------|--------|-------------|--------|--------|--------------------|--------|---------|-----------------|--------|--------|----------|--------|
|                               |   |        |   |   |               |   |    |            |   |   |     |   |
| John R. O'Rourke (1)               |   |        | 12,000 |   |               |   | 552,343 |            |   |   | -        |   |   |   | 564,343 |   |
| Andrew J. Kaplan (2)               |   |        | 8,000  |   |               |   | 80,220  |            |   |   | -        |   |   |   | 88,220 |   |
| Jason Les (3)                      |   |        | 6,000  |   |               |   | 50,625  |            |   |   | -        |   |   |   | 56,625 |   |
| Michael M. Beeghley (former) (4)   |   |        | 20,000 |   |               |   | 584,495 |            |   |   | -        |   |   |   | 604,495 |   |
| Mike Dai (former) (5)         |   |        | 10,000 |   |               |   | 234,050 |            |   |   | -        |   |   |   | 244,050 |   |
| Eric So (former) (6)               |   |        | 2,000  |   |               |   | 63,675  |            |   |   | -        |   |   |   | 65,675 |   |
| Michael W. Routh (former) (7) |   |        | 1,000  |   |               |   | 62,600  |            |   |   | -        |   |   |   | 63,600 |   |

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| Name and Address                                                |   | Number of Shares |    |   | Percent |   |
|-----------------------------------------------------------------|--------|------------------|---------|--------|---------|--------|
| Directors:                                                      |   |             |    |   |    |   |
| John R. O'Rourke (1)                                            |   |             | 257,221 |   |    |   | 1.9 | % |
| Jason Les (2)                                                   |   |             | 20,937  |   |    |   | * |   |
| Andrew J. Kaplan (3)                                            |   |             | 14,417  |   |    |   | * |   |
| Remo Mancini (4)                                                |   |             | 26,250  |   |    |   | * |   |
| Other Executive Officers:                                       |   |             |    |   |    |   |   |   |
| Robby Chang (5)                                                 |   |             | 7,500   |   |    |   | * |   |
| Christopher Ensey (6)                                           |   |             | 25,000  |   |    |   | * |   |
| Jeffrey G. McGonegal (7)                                        |   |             | 26,072  |   |    |   | * |   |
| All Directors and Executive Officers as a Group (7 persons) (8) |   |             | 377,397 |   |    |   | 2.7 | % |
| (1) | Includes (i) 8,752 shares of common stock vested or to be vested pursuant to a restricted stock award of an aggregate of 35,000 shares pursuant to the 2002 Stock Incentive Plan (the "2002 Plan") which vest in 24 equal monthly installments over a two year period, beginning on the one month anniversary of February 3, 2017, (ii) 7,501 shares of common stock vested or to be vested pursuant to a restricted stock award of an aggregate of 30,000 shares pursuant to the 2002 Plan which vest in 24 equal monthly installments over a two year period, beginning on the one month anniversary of August 21, 2017, (iii) 28,127 shares of common stock vested or to be vested pursuant to a restricted stock award of an aggregate of 75,000 shares pursuant to the 2017 Equity Incentive Plan (the "2017 Plan") which vest in 24 equal monthly installments over a two year period, beginning on the one month anniversary of September 27, 2017, (iv) 100,341 shares of common stock vested or to be vested pursuant to a restricted stock award of an aggregate of 344,000 shares pursuant to the 2017 Plan which vest in 24 equal monthly installments over a two year period, beginning on the one month anniversary of November 3, 2017 and (v) options currently exercisable or exercisable within 60 days to purchase an aggregate of 100,000 shares of common stock at an exercise price of $10.00 per share pursuant to the 2017 Plan.  Also includes an aggregate of 12,500 shares held by ATG Capital LLC, for which Mr. O'Rourke is the managing member and sole beneficiary and in such capacity holds voting and dispositive power over the securities held by that entity. |
|-----|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| (2) | Includes (i) 15,000 shares of common stock, (ii) 2,187 shares of common stock vested or to be vested pursuant to a restricted stock award of an aggregate of 7,500 shares pursuant to the 2017 Plan which vest in 24 equal monthly installments over a two year period, beginning on the one month anniversary of November 3, 2017 and (iii) 3,750 shares of common stock vested or to be vested pursuant to a restricted stock award of an aggregate of 7,500 shares pursuant to the 2017 Plan which vest in 6 equal monthly installments, beginning on the one month anniversary of March 21, 2018.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
| (3) | Includes (i) 2,416 shares of common stock, (ii) 4,500 shares vested or to be vested of common stock pursuant to a restricted stock award of an aggregate of 12,000 shares pursuant to the 2002 Plan which vest in 24 equal monthly installments over a two year period, beginning on the one month anniversary of May 5, 2017, (iii) 3,751 shares of common stock vested or to be vested pursuant to a restricted stock award of an aggregate of 10,000 shares pursuant to the 2002 Plan which vest in 24 equal monthly installments over a two year period, beginning on the one month anniversary of August 21, 2017 and (iv) 3,750 shares of common stock vested or to be vested pursuant to a restricted stock award of an aggregate of 7,500 shares pursuant to the 2017 Plan which vest in 6 equal monthly installments, beginning on the one month anniversary of March 21, 2018.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
| (4) | Represents vested portion of restricted stock grant of 45,000 shares issued February 23, 2018 under the 2017 Plan and 3,750 shares of common stock vested or to be vested pursuant to a restricted stock award of an aggregate of 7,500 shares pursuant to the 2017 Plan which vest in 6 equal monthly installments, beginning on the one-month anniversary of March 21, 2018.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
| (5) | Represents portion of restricted stock grant of 60,000 shares that has vested or will vest within 60 days of March 22, 2018, issued under the 2017 Plan.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
| (6) | Includes 8,334 shares representing portion of restricted stock grant of 50,000 shares that has vested or will vest within 60 days of April 24, 2018, and 16,666 shares underlying options representing portion of option grant of 50,000 options that has vested or will vest within 60 days of April 24, 2018.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
| (7) | Includes (i) 1,009 shares of common stock, (ii) 63 shares of common stock held in Mr. McGonegal's IRA (iii) 20,000 shares of common stock vested or to be vested pursuant to a restricted stock award of an aggregate of 20,000 shares pursuant to the 2002 Plan which vests as of April 30, 2018 and (iv) 5,000 shares of common stock vested or to be vested pursuant to a restricted stock award of an aggregate of 5,000 shares pursuant to the 2017 Plan which vest in 7 equal monthly installments, beginning on October 31, 2017.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
| (8) | Includes footnotes (1) through (7).                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   |

----

| Plan Category                                                   |   | Number of securities to be issued upon exercise of outstanding options |    |   | Weighted average exercise price of outstanding options |   |    | Number of securities remaining available for future issuance |   |
|-----------------------------------------------------------------|--------|------------------------------------------------------------------------|---------|--------|--------------------------------------------------------|--------|---------|--------------------------------------------------------------|--------|
|                                                            |   |                                                                   |    |   |                                                   |   |    |                                                         |   |
| Equity compensation plans approved by security holders     |   |                                                                   | 119,533 |   |                                                   | $      | 9.02    |                                                         |   |   | 329,000 |   |
|                                                            |   |                                                                   |    |   |                                                   |   |    |                                                         |   |   |   |   |
| Equity compensation plans not approved by security holders |   |                                                                   | — |   |                                                   |   | — |                                                         |   |   | — |   |
|                                                            |   |                                                                   |    |   |                                                   |   |    |                                                         |   |   |   |   |
| Total                                                           |   |                                                                   | 119,533 |   |                                                   | $      | 9.02    |                                                         |   |   | 329,000 |   |

----

|               |   | 2017   |    |   | 2016   |   |
|--------------------|--------|--------|---------|--------|--------|--------|
|               |   |   |    |   |   |   |
| Audit Fees         |   | $      | 268,000 |   |   | $      | 87,000 |   |
| Audit Related Fees |   |   | — |   |   |   | — |   |
| Tax Fees           |   |   | — |   |   |   | — |   |
| All Other Fees     |   |   | — |   |   |   | — |   |
| Total Fees         |   | $      | 268,000 |   |   | $      | 87,000 |   |

----

| No. | Exhibit |
|-----|---------|

| 3.1 | Articles of Incorporation filed September 20, 2017 (Incorporated by reference to Exhibit 3.1of the Current Report on Form 8-K filed September 25, 2017). |
|-----|----------------------------------------------------------------------------------------------------------------------------------------------------------|

| 3.2 | Amendment to Bylaws effective March 9, 2018 (Incorporated by reference to Exhibit 3.1 of the Current Report on Form 8-K filed March 12, 2018). |
|-----|------------------------------------------------------------------------------------------------------------------------------------------------|

| 3.3 | Bylaws effective September 20, 2017 (Incorporated by reference to Exhibit 3.2 of the Current Report on Form 8-K filed September 25, 2017). |
|-----|--------------------------------------------------------------------------------------------------------------------------------------------|

| 3.4 | Articles of Merger between Bioptix, Inc., and Riot Blockchain, Inc. (Incorporated by reference to Exhibit 3.1 of the Current Report on Form 8-K filed October 4, 2017). |
|-----|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 4.1 | Certificate of Designation of Rights, Powers, Preferences, Privileges and Restrictions of the 2% Series A Convertible Preferred Stock of Bioptix, Inc. (Incorporated by reference to Exhibit 3.3 of the Current Report on From 8-K filed September 25, 2017). |
|-----|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 4.2 | Amendment to Certificate of Designation of 0% Series B Convertible Preferred Stock (Incorporated by reference from Exhibit 3.1 of the Current Report on From 8-K filed December 21, 2017) |
|-----|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 4.3 | Certificate of Designations, Preferences and Rights of the 0% Series B Convertible Preferred Stock of the Company. (Incorporated by reference from Exhibit 3.1 of the Current Report on From 8-K filed November 3, 2017). |
|-----|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 10.1 | 2017 Equity Incentive Plan, as amended (Incorporated by reference to Appendix E to the Definitive Proxy Statement on Schedule DEF14A filed July 10, 2017, as amended incorporated by reference to the Definitive Proxy Statement on Schedule DEF14A filed March 26, 2018 and Schedule DEFA14A filed April 2, 2018). |
|------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 10.2 | Bioptix, Inc. Amended and Restated Equity Incentive Plan  (Incorporated by reference to Exhibit 10.1 of the  Current Report on Form 8-K filed December 2, 2016). |
|------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 10.3 | First Amendment to Lease Agreement, dated March 26, 2018 (Incorporated by reference to Exhibit 10.1 of the Current Report on Form 8-K filed March 27, 2018). |
|------|--------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 10.4 | Lease Agreement dated as of February 27, 2018 (Incorporated by reference to Exhibit 10.1 of the Current Report on Form 8-K filed February 28, 2018). |
|------|------------------------------------------------------------------------------------------------------------------------------------------------------|

| 10.5 | Executive Employment Agreement dated as of January 27, 2018 by and between Company and Christopher Ensey (Incorporated by reference to Exhibit 10.1 of the Current Report on Form 8-K filed January 31, 2018). |
|------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 10.6 | Employment Agreement by and between the Company and John O'Rourke dated as of November 3, 2017.   (Incorporated by reference to Exhibit 10.6 of the Quarterly Report on Form 10-Q for the period ended September 30, 2017 filed November 13, 2017). |
|------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 10.7 | Executive Employment Agreement dated as of February 27, 2018 by and between Company and Robby Chang (Incorporated by reference to Exhibit 10.1 of the Current Report on Form 8-K filed February 28, 2018). |
|------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 10.8 | Executive Employment Agreement dated as of January 20, 2018 by and between Riot Blockchain Canada Inc. and Jeffrey Vormittag (Incorporated by reference to Exhibit 10.1 of the Current Report on Form 8-K filed January 18, 2018). |
|------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 10.9 | Executive Employment Agreement dated as of January 7, 2018 by and between Digital Green Energy Corp. and Daniel Stefan Robertson  (Incorporated by reference to Exhibit 10.1 of the Current Report on Form 8-K filed January 11, 2018). |
|------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 10.10 | Amendment No. 1 to Retention Agreement by and between the Company and Jeff McGonegal dated as of March 27, 2018 (Incorporated by reference to Exhibit 10.3 of the Current Report on Form 8-K filed March 27, 2018). |
|-------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 10.11 | Retention Agreement by and Between the Company and Jeff McGonegal dated as of June 30, 2017 (Incorporated by reference to Exhibit 10.1 of the Current Report on Form 8-K filed July 3, 2017) |
|-------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

| 10.12 | Separation Agreement by and between the Company and Michael Beeghley dated as of November 3, 2017. (Incorporated by reference to Exhibit 10.5 of the Quarterly Report on Form 10-Q for the period ended September 30, 2017 filed November 13, 2017). |
|-------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 10.13 | Separation Agreement by and between the Company and Richard Whitcomb dated as of June 15, 2017- (Incorporated by reference to Exhibit 10.1 of the Current Report on Form 8-K filed June 15, 2017). |
|-------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 10.14 | Separation Agreement by and between the Company and Steve Lundy dated as of April 6, 2017- (Incorporated by reference to Exhibit 10.1 of the Current Report on Form 8-K filed April 7, 2017). |
|-------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 10.15 | Logical Brokerage Corp.  Stock Purchase Agreement dated as of March 26, 2018 (Incorporated by reference to Exhibit 2.1 of the Current Report on Form 8-K filed March 27, 2018). |
|-------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 10.16 | Stockholders Agreement dated March 26, 2018, among  Logical Brokerage Corp., Riot Blockchain, Inc. and Mark Bradley Fisher (Incorporated by reference to Exhibit 10.2 of the Current Report on Form 8-K filed March 27, 2018). |
|-------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 10.17 | Asset Purchase Agreement by and between Company and Prive Technologies LLC dated as of February 15, 2018 (Incorporated by reference to Exhibit 10.1 of the Current Report on Form 8-K filed February 16, 2018). |
|-------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 10.18 | Form of Escrow Deposit Agreement (Incorporated by reference to Exhibit 10.2 of the Current Report on Form 8-K filed February 16, 2018). |
|-------|-----------------------------------------------------------------------------------------------------------------------------------------|

| 10.19 | Asset Purchase Agreement by and between Blockchain Mining Supply & Services Ltd and the Company dated February 15, 2018 (Incorporated by reference to Exhibit 10.3 of the Current Report on Form 8-K filed February 16, 2018). |
|-------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 10.20 | Escrow Agreement by and between Blockchain Mining Supply & Services Ltd. and the Company dated February 15, 2018 (Incorporated by reference to Exhibit 10.4 of the Current Report on Form 8-K filed February 16, 2018). |
|-------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 10.21 | Ingenium International Consulting Agreement dated as of February 21, 2018 (Incorporated by reference to Exhibit 10.1 of the Current Report on Form 8-K filed February 23, 2018). |
|-------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 10.22 | Share Exchange Agreement by and among the Company., Kairos Global Technology, Inc., and the shareholders of Kairos Global Technology, Inc. dated as of November 1, 2017 (Incorporated by reference to Exhibit 10.4 of the Quarterly Report on Form 10-Q for the quarter ended September 30, 2017 filed November 13, 2017). |
|-------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 10.23 | Form of Purchase Agreement by and between the Company and Tess Inc. dated as of  October 20, 2017 (Incorporated by reference to Exhibit 10.2 of the Quarterly Report on Form 10-Q for the quarter ended September 30, 2017 filed November 13, 2017). |
|-------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 10.24 | Registration Rights Agreement by and between the Company and Tess Inc. dated as of October 20, 2017 (Incorporated by reference to Exhibit 10.3 of the Company's Quarterly Report on Form 10-Q for the quarter ended September 30, 2017 filed November 13, 2017). |
|-------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 10.25 | Form of Subscription Agreement by and between the Company and goNumerical Ltd. (Coinsquare) dated as of  September 29, 2017 (Incorporated by reference to Exhibit 10.1 of the Quarterly Report on Form 10-Q for the quarter ended September 30, 2017 filed November 13, 2017). |
|-------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 10.26 | Form of Securities Purchase Agreement (Units) dated as of December 18, 2017 (Incorporated by reference to Exhibit 10.1 of the Current Report on Form 8-K filed December 19, 2017). |
|-------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 10.27 | Form of Registration Rights Agreement dated as of December 18, 2017 (Incorporated by reference to Exhibit 10.2 of the Current Report on Form 8-K filed December 19, 2017). |
|-------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 10.28 | Form of Common Stock Purchase Warrant dated as of December 18, 2017 (Incorporated by reference to Exhibit 4.1 of the Current Report on Form 8-K filed December 19, 2017). |
|-------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 10.29 | Form of Securities Purchase Agreement dated, as of March 10, 2017 (Incorporated by reference to Exhibit 10.1 of the Current Report on Form 8-K filed March 16, 2017). |
|-------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 10.30 | Form of Amendment to Registration Rights Agreement (Units) dated as of December 21, 2017 (Incorporated by reference to Exhibit 10.1 of the Current Report on Form 8-K filed December 21, 2017). |
|-------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

| 10.31 | Form of Amendment to Registration Rights Agreement dated as of December 21, 2017 (Incorporated by reference to Exhibit 10.2 of the Current Report on Form 8-K filed December 21, 2017). |
|-------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 10.32 | Form of Registration Rights Agreement dated as of March 10, 2017 (Incorporated by reference to Exhibit 10.2 of the Current Report on Form 8-K filed March 16, 2017). |
|-------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 10.33 | Form of Escrow Deposit Agreement dated as of March 10, 2017 (Incorporated by reference to Exhibit 10.3 of the Current Report on Form 8-K filed March 16, 2017). |
|-------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 10.34 | Form of Escrow Deposit Agreement (Securities) dated  as of March 10, 2017 (Incorporated by reference to Exhibit 10.4 of the Current Report on Form 8-K filed March 16, 2017). |
|-------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 10.35 | Form of Securities Purchase Agreement dated as of March 15, 2017 (Incorporated by reference to Exhibit 10.5 of the Current Report on Form 8-K, effective March 15, 2017 and filed March 17, 2017). |
|-------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 10.36 | Form of Common Stock Purchase Warrant, dated as of March 10, 2017 (Incorporated by reference to Exhibit 4.1 of the Current Report on Form 8-K filed March 16, 2017). |
|-------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 10.37 | Form of Common Stock Purchase Warrant Agreement dated as of May 30, 2013 (Incorporated by reference to Exhibit 4.1 of the Current Report on Form 8-K filed May 30, 2013). |
|-------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 10.38 | Agreement by and between Barry Honig, Catherine DeFrancesco and certain related parties with respect to the Company dated January 18, 2017.(Incorporated by reference to Exhibit 10.1 of the Current Report on Form 8-K filed January 20, 2017). |
|-------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 10.39 | Exclusive License Agreement between Registrant and The Washington University, dated May 1, 2004 as amended (Incorporated by reference from the Quarterly Report on Form 10-Q for the quarter ended June 30, 2010, filed August 5, 2010). |
|-------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 10.40† | Amended and Restated Unanimous Shareholder Agreement dated October 2, 2017, among the Company, goNumerical Ltd., and the other parties named therein. (Incorporated by reference to Exhibit 10.1 of the Current Report on From 8-K filed May 25, 2018. |
|--------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 14 | Code of Ethics Adopted October 23, 2017. (Incorporated by reference to Exhibit 14 of the Current Report on Form 8-K filed October 25, 2017). |
|----|----------------------------------------------------------------------------------------------------------------------------------------------|

| 23.1 | Consent of MNP LLP (Incorporated by reference from the Annual Report on Form 10-K for the fiscal year ended December 31, 2017, filed on April 17, 2018) |
|------|---------------------------------------------------------------------------------------------------------------------------------------------------------|

| 23.2 | Consent of EisnerAmper LLP (Incorporated by reference from the Annual Report on Form 10-K for the fiscal year ended December 31, 2017, filed on April 17, 2018) |
|------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| 31.1 | Rule 13a-14(a)/15d-14(a) - Certification of Chief Executive Officer * |
|------|-----------------------------------------------------------------------|

| 31.2 | Rule 13a-14(a)/15d-14(a) - Certification of Principal Financial Officer. * |
|------|----------------------------------------------------------------------------|

| 32 | Section 1350 Certification Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002. * |
|----|----------------------------------------------------------------------------------------------------------------------------------------|

----

|   | RIOT BLOCKCHAIN, INC.                             |
|--------|---------------------------------------------------|
|   |                                              |
|   | /s/ John O'Rourke                                 |
|   | John O'Rourke,Chief Executive Officer             |
|   |                                              |
|   | /s/ Robby Chang                                   |
|   | Robby Chang,Chief Financial Officer               |
|   |                                              |
|   | /s/ Jeffrey G McGonegal                           |
|   | Jeffrey G. McGonegal,Principal Accounting Officer |
|   |                                                                             |
|--------|----------------------------------------------------------------------------------|
|   | /s/ John O'Rourke                                                                |
|   | John O'Rourke,Chief Executive Officer and Director (principal executive officer) |
|   |                                                                             |
|   | /s/ Robby Chang                                                                  |
|   | Robby Chang, Chief Financial Officer                                             |
|   |                                                                             |
|   | /s/ Jeffrey G. McGonegal                                                         |
|   | Jeffrey G. McGonegal, Principal Financial Officer                                |
|   |                                                                             |
|   | /s/ Remo Mancini                                                                 |
|   | Remo Mancini, Director                                                           |
|   |                                                                             |
|   | /s/ Andrew Kaplan                                                                |
|   | Andrew Kaplan, Director                                                          |
|   |                                                                             |
|   | /s/ Jason Les                                                                    |
|   | Jason Les, Director                                                              |
|   |                                                                             |
|   |                                                                             |