| Riot Blockchain, Inc.                                         |
|---------------------------------------------------------------|
| (Exact name of registrant as specified in its charter)   |
| Nevada                                                        | 84-1553387 |
| (State or other jurisdiction ofincorporation or organization) | (I.R.S. Employer Identification No.) |
|                                                          |
| 202 6th Street, Suite 401 Castle Rock, CO  80104    |
| (Address of principal executive offices) (Zip Code)           |
|  (303) 794-2000                                          |
| (Registrant's telephone number, including area code)          |
| Large Accelerated Filer                         | ☐  |                                                    | Accelerated Filer                       | ☐ |
|-------------------------------------------------|---------------|---------------------------------------------------------|---------------------------------------------------|---------|
| Non-accelerated Filer                           | ☐       |   (Do not check if smaller reporting company) | Smaller Reporting Company     | ☑ |
| Emerging growth company     | ☐       |                                                    |                                              |    |

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|  | i. | Part I, Item 1 – Notes to the Condensed Interim Consolidated Financial Statements (unaudited), Note 2: Basis of presentation, summary of significant accounting policies and recent accounting pronouncements; |
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|  | ii. | Part I, Item 2 – Management's Discussion and Analysis of Results of Operations and Financial Condition, Management's plans and basis of presentation; Digital Currencies Translations and Remeasurements; |
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|  | iii. | Part I, Item 2 – Management's Discussion and Analysis of Results of Operations and Financial Condition, Management's plans and basis of presentation: Development of a U.S.-Based Digital Currency Exchange; |
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|  | iv. | Part I, Item 2 – Management's Discussion and Analysis of Results of Operations and Financial Condition, Results of Operations: Liquidity and Capital Resources; |
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|  | v. | Part II, Item 1A – Risk Factors; and, |
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|  | vi. | Part II, Item 6 – Exhibits. |
|--|-----|-----------------------------------|

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|                                          |                                                                                  |   |   |   | Page   |   |
|-----------------------------------------------|---------------------------------------------------------------------------------------|--------|--------|--------|--------|--------|
| PART I - Financial Information      |
|                                          |                                                                                  |   |
|                                          | Explanatory Note                                                                      |   |   |   | 2      |   |
|                                          |                                                                                  |   |   |   |   |   |
|                                          | Cautionary Note Regarding Forward Looking Statements                                  |   |   |   | 4      |   |
|                                          |                                                                                  |   |   |   |   |   |
| Item 1.                                       | Notes to the Condensed Interim Consolidated Financial Statements (unaudited)          |   |   |   | 5      |   |
|                                          |                                                                                  |   |
| Item 2.                                       | Management's Discussion and Analysis of Financial Condition and Results of Operations |   |   |   | 7      |   |
|                                          |                                                                                  |   |
|                                          |                                                                                  |   |
| PART II - Other Information    |
|                                          |                                                                                  |   |
|                                          |                                                                                  |   |
| Item 1A.                                      | Risk Factors                                                                          |   |   |   | 13     |   |
|                                          |                                                                                  |   |
| Item 2.                                       | Exhibits                                                                              |   |   |   | 14     |   |
|                                          |                                                                                  |   |
|                                          | Signatures                                                                            |   |   |   | 15     |   |

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|   | · | our history of operating losses and our ability to achieve or sustain profitability; |
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|   | · | our recent shift to an entirely new business and our ability to succeed in this new business; |
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|   | · | intense competition; |
|--------|--------|----------------------|
|   | · | our ability to raise additional capital needed to finance our business; |
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|   | · | general economic conditions in the U.S. and globally; |
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|   | · | our ability to maintain the value and reputation of our brand; |
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|   | · | our ability to attract and retain senior management and other qualified personnel; |
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|   | · | cryptocurrency-related risks, including regulatory changes or actions and uncertainty regarding acceptance and/or widespread use of virtual currency; |
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|   | · | risks relating to our virtual currency mining operations, including among others risks associated with the need for significant electrical power and cybersecurity risks; |
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|   | · | our dependence in large part upon the value of virtual currencies, especially Bitcoin, which have historically been subject to significant volatility in their market prices; |
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|   | · | risks relating to our planned establishment of a virtual currency exchange, including, among others, regulatory requirements and challenges and security threats; |
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|   | · | our ability to protect our intellectual property rights; |
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|   | · | volatility in the trading price of our common stock; |
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|   | · | our ability to maintain the Nasdaq listing of our common stock; |
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|   | · | our investments in other virtual currency and blockchain focused companies may not be realizable; |
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|   | · | legal proceedings to which we are subject, including actions by private plaintiffs and the SEC; and |
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|   | · | the risks, uncertainties discussed in "Part I. Item 1A. Risk Factors" included in this Quarterly Report and our Quarterly Reports on Form 10-Q for the periods ended March 31, 2018, June 30, 2018, and as originally filed on Form 10-Q for the period ended September 30, 2018, and our Annual Report on Form 10-K for the year ended December 31, 2017, as amended, our Registration Statement on Form S-3, as amended, and in our Current Reports on Forms 8-K, as applicable. |
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| EXHIBIT |   | DESCRIPTION                                                                                                                                               |
|---------|--------|-----------------------------------------------------------------------------------------------------------------------------------------------------------|
| 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 Chief 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. Furnished herewith.* |

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|                          | Riot Blockchain, Inc.  (Registrant)                                              |
|-------------------------------|----------------------------------------------------------------------------------|
|                          |                                                                             |
|  Dated: January 11, 2019 | /s/ Christopher Ensey                                                            |
|                          | Christopher Ensey  Interim Chief Executive Officer (Principal Executive Officer) |
|  Dated: January 11, 2019 | /s/ Robby Chang                                                                   |
|-------------------------------|-----------------------------------------------------------------------------------|
|                          | Robby Chang  Chief Financial Officer (Principal Financial and Accounting Officer) |
|                          |                                                                         |

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