|   | ☒ | 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                                                         |   | 84-1553387                           |
|----------------------------------------------------------------|--------|--------------------------------------|
| (State or other jurisdiction of Incorporation or organization) |   | (I.R.S. Employer Identification No.) |
| 202 6th Street, Suite 401, Castle 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 ☒ |
| Emerging growth company ☐ |   |   |                                   |

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|     | Page                                                                                            |
|----------|-------------------------------------------------------------------------------------------------|
|     |                                                                                            |   |
| PART I   |                                                                                            |
| Item 1A. | Risk Factors.                                                                                   | 1 |
| PART III |                                                                                            |
|     |                                                                                            |   |
| Item 10. | Directors, Executive Officers and Corporate Governance.                                         | 22 |
| Item 11. | Executive Compensation.                                                                         | 26 |
| Item 12. | Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters. | 29 |
| Item 13. | Certain Relationships and Related Transactions, and Director Independence.                      | 30 |
| Item 14. | Principal Accountant Fees and Services.                                                         | 31 |
|     |                                                                                            |   |
| PART IV  |                                                                                            |
|     |                                                                                            |   |
| Item 15. | Exhibits, Financial Statement Schedules.                                                        | 31 |

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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; |
|--------|--------------------------------------------------------------------------------------------------|
| · | Other risks and uncertainties related to our business plan and business strategy; and |
|--------|---------------------------------------------------------------------------------------|
| · | Ability to continue as a going concern. |
|--------|-----------------------------------------|

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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 digital currencies as a medium to exchange;                                                                                                   |
|--------|--------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|   | · | governmental and quasi-governmental regulation of digital currencies and their use, or restrictions on or regulation of access to and operation of the network or similar digital currency systems; |
|   | · | changes in consumer demographics and public tastes and preferences;                                                                                                                                 |
|   | · | the maintenance and development of the open-source software protocol of the network;                                                                                                                |
|   | · | the increased consolidation of contributors to the bitcoin blockchain through mining pools;                                                                                                         |
|   | · | 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 digital currencies 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 digital currencies 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 digital currencies;                                         |
|   | · | 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 stockholders;                                                        |
|   | · | other actions taken by our stockholders;                                                                                                 |
|   | · | 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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| Name              |   | Age    |   | Position                              |
|-------------------|--------|--------|--------|---------------------------------------|
|              |   |   |   |                                  |
| Remo Mancini      |   | 67     |   | Director, Chairman and Lead Director  |
| Jason Les         |   | 33     |   | Director                              |
| Benjamin Yi       |   | 37     |   | Director                              |
| Jeffrey McGonegal |   | 68     |   | Chief Executive Officer               |
| Robby Chang       |   | 41     |   | Chief Financial Officer and Secretary |
| Melior Resources Inc. (TSX-V)              | February 2013 to March 2014 |
|--------------------------------------------|-----------------------------|
| Estrella Int. Energy Services Inc. (TSX-V) | June 2010 to March 2016     |
| Niocan Inc. (TSX and TSX-V)                | June 2007 to June 2018      |

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| Director     |   | Audit Committee |   | Compensation Committee |   | Nominating and Corporate Governance Committee |   | Independent |
|--------------|--------|-----------------|--------|------------------------|--------|-----------------------------------------------|--------|-------------|
| Remo Mancini |   | Member          |   | Member                 |   | Chairman                                      |   | Yes         |
| Benjamin Yi  |   | Chairman        |   | Member                 |   | Member                                        |   | Yes         |
| Jason Les    |   | Member          |   | Chairman               |   | Member                                        |   | Yes         |
|   | ● | 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 of accounting and financial reporting 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 the Company’s 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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| Name and Principal Position          |   | Year   |   | Salary |    |   | Bonus ($) |   |    | Stock Awards (6) ($) |   |   | Option Awards (7) ($) |   |   | All Other Compensation ($) |    |   | Total ($) |   |
|--------------------------------------|--------|--------|--------|--------|---------|--------|-----------|--------|---------|----------------------|--------|--------|-----------------------|--------|--------|----------------------------|---------|--------|-----------|--------|
|                                 |   |   |   |   |    |   |      |   |    |                 |   |   |                  |   |   |                       |    |   |      |   |
| Christopher Ensey                    |   | 2018   |   | $      | 248,208 |   |      | $      | — |                 |   | $      | 859,660               |   |   | $                          | 701,970 |   |      | $      | 5,845 |   |   | $ | 1,815,683 |   |
| Interim Chief Executive Officer (1)  |   |   |   |   |    |   |      |   |    |                 |   |   |                  |   |   |                       |    |   |      |   |   |   |   |   |
|                                 |   |   |   |   |    |   |      |   |    |                 |   |   |                  |   |   |                       |    |   |      |   |   |   |   |   |   |   |
| Robby Chang                          |   | 2018   |   | $      | 210,256 |   |      | $      | — |                 |   | $      | 646,680               |   |   | $                          | — |   |      | $      | 4,370 |   |   | $ | 861,306 |   |
| Chief Financial Officer (2)          |   |   |   |   |    |   |      |   |    |                 |   |   |                  |   |   |                       |    |   |      |   |   |   |   |   |   |   |
|                                 |   |   |   |   |    |   |      |   |    |                 |   |   |                  |   |   |                       |    |   |      |   |   |   |   |   |   |   |
| Jeffrey Vormittag                    |   | 2018   |   | $      | 213,173 |   |      | $      | 25,000  |                 |   | $      | 584,400               |   |   | $                          | — |   |      | $      | 4,247 |   |   | $ | 826,820 |   |
| Chief Operating Officer (3)          |   |   |   |   |    |   |      |   |    |                 |   |   |                  |   |   |                       |    |   |      |   |   |   |   |   |   |   |
|                                 |   |   |   |   |    |   |      |   |    |                 |   |   |                  |   |   |                       |    |   |      |   |   |   |   |   |   |   |
| Jeffrey G. McGonegal,                |   | 2018   |   | $      | 272,005 |   |      | $      | 70,000  |                 |   | $      | —               |   |   | $                          | 45,017  |   |      | $      | 13,632 |   |   | $ | 400,654 |   |
| Chief Financial Officer (former) (4) |   | 2017   |   | $      | 272,005 |   |      | $      | 140,000 |                 |   | $      | 127,800               |   |   | $                          | — |   |      | $      | 169,843 |   |   | $ | 709,648 |   |
|                                 |   |   |   |   |    |   |      |   |    |                 |   |   |                  |   |   |                       |    |   |      |   |   |   |   |   |   |   |
| John O'Rourke III                    |   | 2018   |   | $      | 206,500 |   |      | $      | — |                 |   | $      | —               |   |   | $                          | — |   |      | $      | 920 |   |   | $ | 207,420 |   |
| Chief Executive Officer (former) (5) |   | 2017   |   | $      | 50,000  |   |      | $      | — |                 |   | $      | —               |   |   | $                          | 609,742 |   |      | $      | — |   |   | $ | 659,742 |   |

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|                                        |   | Option Awards              |   | Restricted Stock Awards |                                                              |
|---------------------------------------------|--------|---------------------------------------------------------------------------------------------|--------|-------------------------|-------------------------------------------------------------------|
| Named Executive                             |   | Number of Securities Underlying Unexercised Options Exercisable                             |   |                    | Number of Securities Underlying Unexercised Options Unexercisable |   |   | Equity Incentive Plan Awards: Number of Securities Underlying Unexercised Unearned Options |   |   | Option Exercise Price |   |   | Number of Stock Options Held at Fiscal Year-End |   | Option Expire Date |   | 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 Shares of Restricted Stock Held at Fiscal Year-End |   |
|  Officer      |   |                                                                                        | (#)    |                    |                                                              |   | (#) |   |   |   | (#) |   |   | ($) |   |   |   | (#) |   | ($) |   |   | (#) |   |   | ($) |   |   |   | (#) |   |
|                                        |   |                                                                                        |   |                    |                                                              |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Christopher Ensey (1)                       |   |                                                                                        | 45,833 |                    |                                                              |   | 4,167 |   |   |   | -- |   |   | $ | 18.50 |   |   |   | 50,000 |   | 27-Jan-28 |   |   | 27,084 |   |   | $ | 40,897 |   |   |   | 46,916 |   |
|                                        |   |                                                                                        |   |                    |                                                              |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| Robby Chang (2)                             |   |                                                                                        | --     |                    |                                                              |   | -- |   |   |   | -- |   |   |   | -- |   |   |   | -- |   |   |   |   | 35,000 |   |   | $ | 52,850 |   |   |   | 37,000 |   |

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| Named Executive Officer / Benefit |   | Termination without Cause ($) |    |   | Death or Disability ($) |   |    | Change in Control (Single Trigger) ($) |   |   | Change in Control (Double Trigger) (1) ($) |   |
|-----------------------------------|--------|-------------------------------|---------|--------|-------------------------|--------|---------|----------------------------------------|--------|--------|--------------------------------------------|--------|
|                              |   |                          |    |   |                    |   |    |                                   |   |   |                                       |   |
| Christopher Ensey:                |   |                          |    |   |                    |   |    |                                   |   |   |                                       |   |
| Severance                         |   |                          | 153,000 |   |                    |   | 153,000 |                                   |   |   | -                                          |   |   |   | 153,000 |   |
| Restricted Common Shares          |   |                          | -       |   |                    |   | -       |                                   |   |   | -                                          |   |   |   | 40,897 |   |
| Options                           |   |                          | -       |   |                    |   | -       |                                   |   |   | -                                          |   |   |   | - |   |
| Total                             |   |                          | 153,000 |   |                    |   | 153,000 |                                   |   |   | -                                          |   |   |   | 193,897 |   |
|                              |   |                          |    |   |                    |   |    |                                   |   |   |                                       |   |   |   |   |   |
| Robby Chang:                      |   |                          |    |   |                    |   |    |                                   |   |   |                                       |   |   |   |   |   |
| Severance                         |   |                          | 125,000 |   |                    |   | -       |                                   |   |   | -                                          |   |   |   | 125,000 |   |
| Restricted Common Shares          |   |                          | -       |   |                    |   | -       |                                   |   |   | -                                          |   |   |   | 52,850 |   |
| Options                           |   |                          | -       |   |                    |   | -       |                                   |   |   | -                                          |   |   |   | - |   |
| Total                             |   |                          | 125,000 |   |                    |   | -       |                                   |   |   | -                                          |   |   |   | 177,850 |   |

| Name                       |   | Cash Fees ($) |   |   | Stock Awards (6) ($) |   |    | Option Awards ($) |   |   | Total ($) |   |
|----------------------------|--------|---------------|--------|--------|----------------------|--------|---------|-------------------|--------|--------|-----------|--------|
|                       |   |          |   |   |                 |   |    |              |   |   |      |   |
|  Remo Mancini (1)     |   |          | 85,009 |   |                 |   | 619,860 |              |   |   | -         |   |   |   | 704,869 |   |
|  Jaeon Les (2)        |   |          | 46,160 |   |                 |   | 108,630 |              |   |   | -         |   |   |   | 154,790 |   |
|  Benjamin Yi          |   |          | 10,688 |   |                 |   | -       |              |   |   | -         |   |   |   | 10,688 |   |
|  Andrew J. Kaplan (3) |   |          | 32,489 |   |                 |   | 108,630 |              |   |   | -         |   |   |   | 141,119 |   |
|  John O'Rourke (4)    |   |          | 2,000  |   |                 |   | -       |              |   |   | -         |   |   |   | 2,000 |   |
|  Eric So (5)          |   |          | 2,000  |   |                 |   | -       |              |   |   | -         |   |   |   | 2,000 |   |

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| Name and Address                                                |   | Number of Shares |    |   | Percent |   |
|-----------------------------------------------------------------|--------|------------------|---------|--------|---------|--------|
| Directors:                                                      |   |             |    |   |    |   |
| Remo Mancini (1)                                                |   |             | 76,500  |   |    |   | * | % |
| Jason Les (2)                                                   |   |             | 40,437  |   |    |   | * |   |
| Benjamin Yi                                                     |   |             | -       |   |    |   | - |   |
|                                                            |   |             |    |   |    |   |   |   |
| Other Executive Officers:                                       |   |             |    |   |    |   |   |   |
| Jeffrey G. McGonegal (3)                                        |   |             | 38,701  |   |    |   | * |   |
| Robby Chang (4)                                                 |   |             | 49,503  |   |    |   | * |   |
|                                                            |   |             |    |   |    |   |   |   |
| All Directors and Executive Officers as a Group (5 persons) (5) |   |             | 206,704 |   |    |   | 1.4 | % |
| (1) | Represents vested restricted stock grants of 45,000 shares granted February 23, 2018, 7,500 shares granted March 21, 2018 and 24,000 shares granted September 20, 2018, all under the 2017 Plan.                                                                                                                                                                                                                                                                                                                                                                                    |
|-----|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| (2) | Includes (i) 15,000 shares of common stock, (ii) 5,937 shares of common stock vested or to be vested pursuant to a restricted stock award of an aggregate of 7,500 shares that has vested or will vest within 60 days of April 19, 2019, 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) vested restricted stock grants of 7,500 granted March 21, 2018 and vested restricted stock grants of 12,000 shares granted September 20, 2018, all under the 2017 Plan. |
| (3) | Includes (i) 21,638 shares of common stock, (ii) 63 shares of common stock held in Mr. McGonegal's IRA (iii) vested restricted stock grants of 5,000 shares of common stock pursuant to a restricted stock award of under the 2017 Plan.                                                                                                                                                                                                                                                                                                                                            |
| (4) | Represents vested portion of restricted stock grant totaling 37,503 shares out of a total grant of 60,000 shares that has vested or will vest within 60 days of April 19, 2019, which vest in 24 equal monthly installments over a two year period, beginning on the one month anniversary of February 27, 2018 and vested restricted stock grants totaling 12,000 shares granted September 20, 2018, all under the 2017 Plan.                                                                                                                                                      |
| (5) | Includes footnotes (1) through (4).                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |

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| Plan Category                                                   |   | Number of securities to be issued upon exercise of outstanding options and restricted common stock |    |   | Weighted average exercise price of outstanding options |   |    | Number of securities remaining available for future issuance |   |
|-----------------------------------------------------------------|--------|----------------------------------------------------------------------------------------------------|---------|--------|--------------------------------------------------------|--------|---------|--------------------------------------------------------------|--------|
|                                                            |   |                                                                                               |    |   |                                                   |   |    |                                                         |   |
| Equity compensation plans approved by security holders (1) |   |                                                                                               | 493,354 |   |                                                   | $      | 15.71   |                                                         |   |   | 127,189 |   |
|                                                            |   |                                                                                               |    |   |                                                   |   |    |                                                         |   |   |   |   |
| Equity compensation plans not approved by security holders |   |                                                                                               | — |   |                                                   |   | — |                                                         |   |   | — |   |
|                                                            |   |                                                                                               |    |   |                                                   |   |    |                                                         |   |   |   |   |
| Total                                                           |   |                                                                                               | 493,354 |   |                                                   | $      | 15.71   |                                                         |   |   | 127,189 |   |
|   | (1) | Consists of 62,000 stock options with a weighted average exercise price of $15.71 and 431,354 shares of restricted stock. |
|--------|-----|---------------------------------------------------------------------------------------------------------------------------|

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|                   |   | 2018   |    |   | 2017   |   |
|------------------------|--------|--------|---------|--------|--------|--------|
|                   |   |   |    |   |   |   |
| Audit Fees (1)         |   | $      | 564,000 |   |   | $      | 270,000 |   |
| Audit Related Fees (2) |   |   | 74,000  |   |   |   | 40,000 |   |
| Tax Fees               |   |   | — |   |   |   | — |   |
| All Other Fees         |   |   | — |   |   |   | — |   |
| Total Fees             |   | $      | 638,000 |   |   | $      | 310,000 |   |

|  | (1) | Audit fees relate to the financial statement audits, the quarterly reviews and related matters. Audit fees for 2018 include services rendered by Marcum LLP for the 2018 audit totaled $491,000 and services rendered by MNP LLP for their reviews of the interim condensed consolidated financial statements included in the Company's Form 10-Qs during the first three quarters of 2018 totaled $73,000.  Audit fees for 2017 include services rendered by MNP LLP for the 2017 audit totaling $184,000 and services rendered by EisnerAmper LLP (the Company’s prior auditor) for their reviews of the interim condensed consolidated financial statements included in the Company's Form 10-Qs during the first three quarters of 2017 totaled $86,000. |
|--|-----|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|  | (2) | Audit related fees include services reasonably related to the performance of audit and review of the consolidated financial services, including services related to the review of our registration statements. Audit related services rendered by MNP LLP, EisnerAmper LLP and Crowe LLP (the Company’s prior auditor) for 2018 totaled $4,000, $67,000 and $3,000, respectively.  Audit related services rendered by EisnerAmper LLP and Crowe LLP for 2017 totaled $25,000 and $15,000, respectively. |
|--|-----|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

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

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|   | RIOT BLOCKCHAIN, INC.                          |
|--------|------------------------------------------------|
|   |                                           |
|   | /s/ Jeffrey G. McGonegal                       |
|   | Jeffrey G. McGonegal,  Chief Executive Officer |
|   |                                           |
|   | /s/ Robby Chang                                |
|   | Robby Chang,  Chief Financial Officer          |
|   |                                                                        |
|--------|-----------------------------------------------------------------------------|
|   | /s/ Jeffrey G. McGonegal                                                    |
|   | Jeffrey G. McGonegal  Chief Executive Officer (principal executive officer) |
|   |                                                                        |
|   | /s/ Robby Chang                                                             |
|   | Robby Chang, Chief Financial Officer (principal financial officer)          |
|   |                                                                        |
|   | /s/ Remo Mancini                                                            |
|   | Remo Mancini, Director                                                      |
|   |                                                                        |
|   | /s/ Jason Les                                                               |
|   | Jason Les, Director                                                    |
|   |                                                                        |
|   | /s/ Benjamin Yi                                                        |
|   | Benjamin Yi, Director                                                       |