Sec Form 4 Filing - Les Jason @ Riot Blockchain, Inc. - 2018-09-20

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Les Jason 2. Issuer Name and Ticker or Trading Symbol Riot Blockchain, Inc. [ RIOT] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) C/O RIOT BLOCKCHAIN, INC., 202 6TH STREET, SUITE 401 3. Date of Earliest Transaction (MM/DD/YY) 09/20/2018 (Street) CASTLE ROCK, CO80104 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 09/20/2018 M( 1 ) 12,000 ( 2 ) A $ 0 ( 2 ) 42,000 ( 3 ) D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Restricted Stock Unit ( 2 ) 09/20/2018 M 12,000 ( 2 ) ( 4 ) Common Stock 12,000 $ 0 12,000 ( 5 ) D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Les Jason C/O RIOT BLOCKCHAIN, INC. 202 6TH STREET, SUITE 401 CASTLE ROCK, CO80104 X Signatures /s/ Jason Les 09/24/2018 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Represents the 12,000 vested Restricted Stock Units ("RSUs") reported in Column 5 of Table I on page one above, convertible into shares of the Issuer's Common Stock on a one-for-one basis pursuant to the Riot Blockchain, Inc. (f/k/a Bioptix, Inc.) Amended & Restated Equity Incentive Plan (the "Plan"). ( 2 )Represents a restricted stock award granted under the Plan at no cost on September 20, 2018, which award vested on the date of the grant, subject to the restrictions of the Plan. ( 3 )Includes: (i) an award of 7,500 RSUs granted on November 3, 2017, which award vests in 24 monthly increments beginning one month following the grant; (ii) an award of 7,500 RSUs granted on March 21, 2018, which award vested pursuant to the Plan; and (iii) an award of 12,000 RSUs granted on September 20, 2018, which award vested on the date of grant. All of these restricted stock awards were granted by the Issuer in connection with the retention of the Reporting Person as a member of its Board of Directors. ( 4 )Not applicable. ( 5 )Represents only the 12,000 RSUs granted on September 20, 2018 and does not include RSUs previously reported.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

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