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 OF SECURITIES
                                                                                  
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
                      
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
__X__ Officer (give title below)    _____ Other (specify below)
Chief Executive Officer
(Last)         (First)         (Middle)
C/O RIOT BLOCKCHAIN, INC., 202 6TH STREET, SUITE 401
3. Date of Earliest Transaction (MM/DD/YYYY)
4/26/2021
(Street)
CASTLE ROCK, CO 80104
(City)       (State)       (Zip)
4. If Amendment, Date Original Filed (MM/DD/YYYY)
 
6. Individual or Joint/Group Filing (Check Applicable Line) _X _ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)
2. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. 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  4/26/2021    M    6250  A  (1) 289652 (2) D   
Common Stock  4/26/2021    F    1875 (3) D $38.48  287777 (2) D   

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 3)
2. Conversion or Exercise Price of Derivative Security 3. Trans. Date 3A. Deemed Execution Date, if any 4. Trans. 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 7. Title and Amount of Securities Underlying Derivative Security
(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 Units  $0.00 (1) 4/26/2021    M        6250    (4)  (4) Common Stock  6250  $0.00 (4) 307367 (2) D   

Explanation of Responses:
(1)  Vested restricted stock units ("RSUs") granted under the Riot Blockchain, Inc. 2019 Equity Incentive Plan, as amended (the "Plan") convert into shares of the Issuer's Common Stock on a one-for-one basis upon settlement by the Issuer in accordance with the procedures of the Plan.
(2)  Represents the total direct and indirect ownership of the security held by the Reporting Person immediately following the transaction reported by this Form 4.
(3)  Represents net settlement for taxes in connection with the settlement of 6,250 vested RSUs, as permitted under the Plan.
(4)  Pursuant to the terms of the Executive Employment Agreement between the Issuer and the Reporting Person, dated effective as of February 8, 2021 (the "Employment Agreement"), the Reporting Person was granted an award of 25,000 RSUs under the Plan, which are eligible to vest in four (4) equal quarterly installments pursuant to and during the term of the Employment Agreement. The transaction reported on this Table II of this Form 4 represents the conversion of the first vested quarterly installment of this RSU award.

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, CO 80104
X
Chief Executive Officer

Signatures
/s/ Jason Les 4/27/2021
**Signature of Reporting Person Date