CUSIP No: 767292105



Washington, D.C. 20549






(Rule 13d-102)




PURSUANT TO § 240.13d-2.


(Amendment No.    )*


Riot Blockchain, Inc.

(Name of Issuer)


Common Stock, no par value

(Title of Class of Securities)



(CUSIP Number)


December 31, 2020

(Date of Event Which Requires Filing of this Statement)


Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

x Rule 13d-1(b)
¨ Rule 13d-1(c)
¨ Rule 13d-1(d)




*The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page.


The information required in the remainder of this cover page shall not be deemed to be "filed" for purposes of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).






CUSIP No: 767292105


  (1) Names of Reporting Persons
Susquehanna Securities, LLC
  (2) Check the Appropriate Box if a Member of a Group (See Instructions)
    (a) ¨
    (b) ¨
  (3) SEC Use Only
  (4) Citizenship or Place of Organization
Number of
Owned by
Person With
(5) Sole Voting Power
(6) Shared Voting Power
(7) Sole Dispositive Power
(8) Shared Dispositive Power
  (9) Aggregate Amount Beneficially Owned by Each Reporting Person
  (10) Check box if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)    ¨
  (11) Percent of Class Represented by Amount in Row (9)
  (12) Type of Reporting Person (See Instructions)













CUSIP No: 767292105


 Item 1.

Name of Issuer


Riot Blockchain, Inc. (the “Company”)


Address of Issuer’s Principal Executive Offices


202 6th Street, Suite 401, Castle Rock, CO 80104

Item 2(a).  

Name of Person Filing


This statement is filed by the entity listed below (referred to herein as the “Reporting Person”) with respect to the shares of common stock, no par value, of the Company (the “Shares”).


(i)            Susquehanna Securities, LLC


Item 2(b).  

Address of Principal Business Office or, if none, Residence


The address of the principal business office of Susquehanna Securities, LLC is:


401 E. City Avenue

Suite 220

Bala Cynwyd, PA 19004


Item 2(c).   Citizenship
Citizenship is set forth in Row 4 of the cover page for the Reporting Person and is incorporated herein by reference.
Item 2(d).   Title of Class of Securities
Common Stock, no par value
Item 2(e)  

CUSIP Number



Item 3. If this statement is filed pursuant to §§240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
  (a) x Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o).
  (b) ¨ Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c).
  (c) ¨ Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c).
  (d) ¨ Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8).
  (e) ¨ An investment adviser in accordance with §240.13d-1(b)(1)(ii)(E);
  (f) ¨ An employee benefit plan or endowment fund in accordance with §240.13d-1(b)(1)(ii)(F);
  (g) ¨ A parent holding company or control person in accordance with §240.13d-1(b)(1)(ii)(G);
  (h) ¨ A savings association as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
  (i) ¨ A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
  (j) ¨ A non-U.S. institution in accordance with § 240.13d–1(b)(1)(ii)(J);
  (k) ¨ Group, in accordance with rule 13d–1(b)(1)(ii)(K).
      If filing as a non-U.S. institution in accordance with § 240.13d–1(b)(1)(ii)(J), please specify the type of institution:                                                        





CUSIP No: 767292105


Item 4. Ownership
Provide the following information regarding the aggregate number and percentage of the class of securities of the issuer identified in Item 1.

The information required by Items 4(a) - (c) is set forth in Rows 5 - 11 of the cover page for the Reporting Person and is incorporated herein by reference.


The number of Shares reported as beneficially owned by Susquehanna Securities, LLC includes options to buy 396,100 Shares.


The Company’s Registration Statement on Form S-3, filed on December 4, 2020 indicates that there were 67,529,907 Shares outstanding as of December 2, 2020. 

Item 5. Ownership of Five Percent or Less of a Class
If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following:   ¨
Item 6. Ownership of More than Five Percent on Behalf of Another Person
Not applicable.
Item 7. Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on By the Parent Holding Company or Control Person
Not applicable.
Item 8. Identification and Classification of Members of the Group
Not applicable.
Item 9. Notice of Dissolution of Group
Not applicable.


Item 10. Certification

By signing below the undersigned certifies that, to the best of its knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect.





CUSIP No: 767292105




After reasonable inquiry and to the best of its knowledge and belief, the undersigned certifies that the information set forth in this statement is true, complete, and correct.


Dated: February 10, 2021


By: /s/ Brian Sopinsky  
Name: Brian Sopinsky  
Title: Secretary