SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549


SCHEDULE 13G


UNDER THE SECURITIES EXCHANGE ACT OF 1934
CleanSpark, Inc.
(Name of Issuer)


Common Stock, $0.001 par value per share
(Title of Class of Securities)


18452B209
(CUSIP Number)


09/30/2025
(Date of Event Which Requires Filing of this Statement)


Check the appropriate box to designate the rule pursuant to which this Schedule is filed:
☒   Rule 13d-1(b)
☐   Rule 13d-1(c)
☐   Rule 13d-1(d)




SCHEDULE 13G
CUSIP No.
18452B209


1 Names of Reporting Persons

G1 Execution Services, LLC
2 Check the appropriate box if a member of a Group (see instructions)

☐  (a)
☐  (b)
3SEC Use Only
4 Citizenship or Place of Organization

ILLINOIS
Number of Shares Beneficially Owned by Each Reporting Person With:
5 Sole Voting Power: 39.00
6 Shared Voting Power: 14,435,578.00
7 Sole Dispositive Power: 39.00
8 Shared Dispositive Power: 14,435,578.00
9 Aggregate Amount Beneficially Owned by Each Reporting Person

14,435,578.00
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)

5.1 %
12 Type of Reporting Person (See Instructions)

BD, OO

Comment for Type of Reporting Person: With respect to Row 5 through Row 9 above, G1 Execution Services, LLC, SIG Brokerage, LP, Susquehanna Investment Group and Susquehanna Securities, LLC are affiliated independent broker-dealers which may be deemed a group. For purposes of this report, we have indicated that each reporting person has sole voting and dispositive power with respect to the shares beneficially owned by it and that the reporting persons have shared voting and dispositive power with respect to all shares beneficially owned by all of the reporting persons. Each of the reporting persons disclaims beneficial ownership of shares owned directly by another reporting person.


SCHEDULE 13G
CUSIP No.
18452B209


1 Names of Reporting Persons

SIG Brokerage, LP
2 Check the appropriate box if a member of a Group (see instructions)

☐  (a)
☐  (b)
3SEC Use Only
4 Citizenship or Place of Organization

DELAWARE
Number of Shares Beneficially Owned by Each Reporting Person With:
5 Sole Voting Power: 992.00
6 Shared Voting Power: 14,435,578.00
7 Sole Dispositive Power: 992.00
8 Shared Dispositive Power: 14,435,578.00
9 Aggregate Amount Beneficially Owned by Each Reporting Person

14,435,578.00
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)

5.1 %
12 Type of Reporting Person (See Instructions)

BD, PN

Comment for Type of Reporting Person: With respect to Row 5 through Row 9 above, G1 Execution Services, LLC, SIG Brokerage, LP, Susquehanna Investment Group and Susquehanna Securities, LLC are affiliated independent broker-dealers which may be deemed a group. For purposes of this report, we have indicated that each reporting person has sole voting and dispositive power with respect to the shares beneficially owned by it and that the reporting persons have shared voting and dispositive power with respect to all shares beneficially owned by all of the reporting persons. Each of the reporting persons disclaims beneficial ownership of shares owned directly by another reporting person.


SCHEDULE 13G
CUSIP No.
18452B209


1 Names of Reporting Persons

Susquehanna Investment Group
2 Check the appropriate box if a member of a Group (see instructions)

☐  (a)
☐  (b)
3SEC Use Only
4 Citizenship or Place of Organization

PENNSYLVANIA
Number of Shares Beneficially Owned by Each Reporting Person With:
5 Sole Voting Power: 2,089,900.00
6 Shared Voting Power: 14,435,578.00
7 Sole Dispositive Power: 2,089,900.00
8 Shared Dispositive Power: 14,435,578.00
9 Aggregate Amount Beneficially Owned by Each Reporting Person

14,435,578.00
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)

5.1 %
12 Type of Reporting Person (See Instructions)

BD, PN

Comment for Type of Reporting Person: With respect to Row 5 through Row 9 above, G1 Execution Services, LLC, SIG Brokerage, LP, Susquehanna Investment Group and Susquehanna Securities, LLC are affiliated independent broker-dealers which may be deemed a group. For purposes of this report, we have indicated that each reporting person has sole voting and dispositive power with respect to the shares beneficially owned by it and that the reporting persons have shared voting and dispositive power with respect to all shares beneficially owned by all of the reporting persons. Each of the reporting persons disclaims beneficial ownership of shares owned directly by another reporting person.


SCHEDULE 13G
CUSIP No.
18452B209


1 Names of Reporting Persons

Susquehanna Securities, LLC
2 Check the appropriate box if a member of a Group (see instructions)

☐  (a)
☐  (b)
3SEC Use Only
4 Citizenship or Place of Organization

DELAWARE
Number of Shares Beneficially Owned by Each Reporting Person With:
5 Sole Voting Power: 12,344,647.00
6 Shared Voting Power: 14,435,578.00
7 Sole Dispositive Power: 12,344,647.00
8 Shared Dispositive Power: 14,435,578.00
9 Aggregate Amount Beneficially Owned by Each Reporting Person

14,435,578.00
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)

5.1 %
12 Type of Reporting Person (See Instructions)

BD, OO

Comment for Type of Reporting Person: With respect to Row 5 through Row 9 above, G1 Execution Services, LLC, SIG Brokerage, LP, Susquehanna Investment Group and Susquehanna Securities, LLC are affiliated independent broker-dealers which may be deemed a group. For purposes of this report, we have indicated that each reporting person has sole voting and dispositive power with respect to the shares beneficially owned by it and that the reporting persons have shared voting and dispositive power with respect to all shares beneficially owned by all of the reporting persons. Each of the reporting persons disclaims beneficial ownership of shares owned directly by another reporting person.



SCHEDULE 13G

Item 1. 
(a) Name of issuer:

CleanSpark, Inc.
(b) Address of issuer's principal executive offices:

10624 S. Eastern Ave, Suite A - 638, Henderson, Nevada 89052
Item 2. 
(a) Name of person filing:

This statement is filed by the entities listed below, who are collectively referred to herein as "Reporting Persons" with respect to the shares of Common Stock, $0.001 par value per share (the "Shares"), of CleanSpark, Inc. (the "Company"). (i) G1 Execution Services, LLC (ii) SIG Brokerage, LP (iii) Susquehanna Investment Group (iv) Susquehanna Securities, LLC
(b) Address or principal business office or, if none, residence:

The address of the principal business office of G1 Execution Services, LLC is: 175 W. Jackson Blvd. Suite 1700 Chicago, IL 60604 The address of the principal business office of each of SIG Brokerage, LP, Susquehanna Investment Group and Susquehanna Securities, LLC is: 401 E. City Avenue Suite 220 Bala Cynwyd, PA 19004
(c) Citizenship:

Citizenship is set forth in Row 4 of the cover page for each Reporting Person hereto and is incorporated herein by reference for each such Reporting Person.
(d) Title of class of securities:

Common Stock, $0.001 par value per share
(e) CUSIP No.:

18452B209
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)☒   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 associations 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). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J),
       please specify the type of institution:
(k)☐   Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
 
Item 4.Ownership
(a) Amount beneficially owned:

The information required by this Item 4(a) is set forth in Row 9 of the cover page for each Reporting Person hereto and is incorporated herein by reference for each such Reporting Person. The number of Shares reported as beneficially owned by Susquehanna Investment Group consists of options to buy Shares. The number of Shares reported as beneficially owned by Susquehanna Securities, LLC includes options to buy 10,838,700 Shares The Company's Quarterly Report on Form 10-Q, filed on August 7, 2025, indicates that there were 281,083,382 Shares outstanding as of August 5, 2025.
(b) Percent of class:

5.1  %
(c) Number of shares as to which the person has:
  (i) Sole power to vote or to direct the vote:

The information required by this Item 4(c)(i) is set forth in Row 5 of the cover page for each Reporting Person hereto and is incorporated herein by reference for each such Reporting Person.

  (ii) Shared power to vote or to direct the vote:

The information required by this Item 4(c)(ii) is set forth in Row 6 of the cover page for each Reporting Person hereto and is incorporated herein by reference for each such Reporting Person.

  (iii) Sole power to dispose or to direct the disposition of:

The information required by this Item 4(c)(iii) is set forth in Row 7 of the cover page for each Reporting Person hereto and is incorporated herein by reference for each such Reporting Person.

  (iv) Shared power to dispose or to direct the disposition of:

The information required by this Item 4(c)(iv) is set forth in Row 8 of the cover page for each Reporting Person hereto and is incorporated herein by reference for each such Reporting Person.

Item 5.Ownership of 5 Percent or Less of a Class.
 
Item 6.Ownership of more than 5 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.Certifications:
 
By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and 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, other than activities solely in connection with a nomination under ?? 240.14a-11.

    SIGNATURE 
 
After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

 
G1 Execution Services, LLC
 Signature:/s/ Brian Sopinsky
 Name/Title:Brian Sopinsky, Secretary
 Date:11/13/2025
 
SIG Brokerage, LP
 Signature:/s/ Brian Sopinsky
 Name/Title:Brian Sopinsky, Assistant Secretary
 Date:11/13/2025
 
Susquehanna Investment Group
 Signature:/s/ Brian Sopinsky
 Name/Title:Brian Sopinsky, General Counsel
 Date:11/13/2025
 
Susquehanna Securities, LLC
 Signature:/s/ Brian Sopinsky
 Name/Title:Brian Sopinsky, Secretary
 Date:11/13/2025
Exhibit Information: EXHIBIT INDEX EXHIBIT DESCRIPTION ________ ________ 99 Joint Filing Agreement

Exhibit 99

JOINT FILING AGREEMENT

This will confirm the agreement by and among the undersigned that the Schedule 13G filed with the Securities and Exchange Commission on or about the date hereof with respect to the beneficial ownership by the undersigned of the Common Stock, $0.001 par value per share of CleanSpark, Inc., is being filed, and all amendments thereto will be filed, on behalf of each of the persons and entities named below in accordance with Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended. This Agreement may be executed in two or more counterparts, each of which shall be deemed an original, but all of which together shall constitute one and the same instrument.

Dated as of November 13, 2025

G1 EXECUTION SERVICES, LLC

By: /s/ Brian Sopinsky

Name: Brian Sopinsky

Title: Secretary

SIG BROKERAGE, LP

By: /s/ Brian Sopinsky

Name: Brian Sopinsky

Title: Assistant Secretary

SUSQUEHANNA INVESTMENT GROUP

By: /s/ Brian Sopinsky

Name: Brian Sopinsky

Title: General Counsel

SUSQUEHANNA SECURITIES, LLC

By: /s/ Brian Sopinsky

Name: Brian Sopinsky

Title: Secretary