Jane Street holds 4.2% of TeraWulf (WULF) common stock

Rhea-AI Filing Summary

Jane Street Group, LLC and its affiliates filed an amended Schedule 13G reporting beneficial ownership of 17,677,746 shares of TeraWulf Inc. common stock, representing 4.2% of the outstanding class as of the reported event.

All reported shares are held with shared voting and shared dispositive power, with no sole authority listed. The filing indicates that the reporting persons now own 5 percent or less of the class and certifies the holdings are not acquired or held for the purpose of changing or influencing control of TeraWulf.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 1)

TERAWULF INC.

(Name of Issuer)

Common Stock, $0.001 par value per share

(Title of Class of Securities)

88080T104

(CUSIP Number)

12/31/2025

(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. 88080T104

1

Names of Reporting Persons

JANE STREET GROUP, 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

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 17,677,746.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 17,677,746.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

17,677,746.00

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)

4.2 %

12

Type of Reporting Person (See Instructions)

HC

SCHEDULE 13G

CUSIP No. 88080T104

1

Names of Reporting Persons

Jane Street Capital, 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

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 37,336.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 37,336.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

37,336.00

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)

0.0 %

12

Type of Reporting Person (See Instructions)

BD

SCHEDULE 13G

CUSIP No. 88080T104

1

Names of Reporting Persons

Jane Street Options, 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

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 9,611,838.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 9,611,838.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

9,611,838.00

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)

2.3 %

12

Type of Reporting Person (See Instructions)

BD

SCHEDULE 13G

CUSIP No. 88080T104

1

Names of Reporting Persons

Jane Street Global Trading, 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

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 8,028,352.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 8,028,352.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

8,028,352.00

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)

1.9 %

12

Type of Reporting Person (See Instructions)

OO

SCHEDULE 13G

CUSIP No. 88080T104

1

Names of Reporting Persons

Jane Street Singapore Pte. Ltd

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

SINGAPORE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 220.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 220.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

220.00

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)

0.0 %

12

Type of Reporting Person (See Instructions)

OO

SCHEDULE 13G

Item 1.
(a)	Name of issuer: TERAWULF INC.
(b)	Address of issuer's principal executive offices: 9 FEDERAL STREET, 9 FEDERAL STREET, EASTON, MARYLAND, 21601.
Item 2.
(a)	Name of person filing: Jane Street Group, LLC; Jane Street Capital, LLC; Jane Street Options, LLC; Jane Street Global Trading, LLC; Jane Street Singapore Pte. Limited
(b)	Address or principal business office or, if none, residence: Jane Street Group, LLC 250 Vesey Street 6th Floor New York, NY 10281 Jane Street Capital, LLC 250 Vesey Street 6th Floor New York, NY 10281 Jane Street Options, LLC 250 Vesey Street 6th Floor New York, NY 10281 Jane Street Global Trading, LLC 250 Vesey Street 6th Floor New York, NY 10281 Jane Street Singapore Pte. Limited 4/F, Ocean Financial Centre 10 Collyer Quay Singapore 049315
(c)	Citizenship: See Item 4 of Cover Page
(d)	Title of class of securities: Common Stock, $0.001 par value per share
(e)	CUSIP No.: 88080T104
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: 17,677,746.00
(b)	Percent of class: 4.2 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 0
	(ii) Shared power to vote or to direct the vote: 17,677,746.00
	(iii) Sole power to dispose or to direct the disposition of: 0
	(iv) Shared power to dispose or to direct the disposition of: 17,677,746.00
Item 5.	Ownership of 5 Percent or Less of a Class.
	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.
	If a parent holding company has filed this schedule, pursuant to Rule 13d-1(b)(ii)(G), so indicate under Item 3(g) and attach an exhibit stating the identity and the Item 3 classification of the relevant subsidiary. If a parent holding company has filed this schedule pursuant to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the identification of the relevant subsidiary. Subsidiary Jane Street Capital, LLC Jane Street Options, LLC Jane Street Global Trading, LLC Jane Street Singapore Pte. Limited
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 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.

JANE STREET GROUP, LLC

Signature:	/s/ Jeremy Kahn
Name/Title:	Jeremy Kahn (Authorized Signatory)
Date:	02/04/2026

Jane Street Capital, LLC

Signature:	/s/ Jeremy Kahn
Name/Title:	Jeremy Kahn (Authorized Signatory)
Date:	02/04/2026

Jane Street Options, LLC

Signature:	/s/ Jeremy Kahn
Name/Title:	Jeremy Kahn (Authorized Signatory)
Date:	02/04/2026

Jane Street Global Trading, LLC

Signature:	/s/ Jeremy Kahn
Name/Title:	Jeremy Kahn (Authorized Signatory)
Date:	02/04/2026

Jane Street Singapore Pte. Ltd

Signature:	/s/ Jeremy Kahn
Name/Title:	Jeremy Kahn (Authorized Signatory)
Date:	02/04/2026

FAQ

What stake in TeraWulf (WULF) does Jane Street Group report?

Jane Street Group reports beneficial ownership of 17,677,746 TeraWulf common shares, representing 4.2% of the outstanding class. This position is reported on an amended Schedule 13G and reflects ownership of 5 percent or less of the company’s common stock.

Which Jane Street entities hold TeraWulf (WULF) shares and how many?

The filing lists multiple Jane Street entities. Jane Street Options, LLC reports 9,611,838 shares (2.3%), and Jane Street Global Trading, LLC reports 8,028,352 shares (1.9%). Smaller positions are reported by Jane Street Capital, LLC and Jane Street Singapore Pte. Ltd.

Does Jane Street have sole or shared voting power over TeraWulf (WULF) shares?

The reporting persons disclose no sole voting or dispositive power over TeraWulf shares. They report shared voting power and shared dispositive power over 17,677,746 shares, meaning decisions over these shares are made jointly rather than by a single entity alone.

Is Jane Street’s TeraWulf (WULF) stake intended to influence control of the company?

The certification states the securities were not acquired and are not held for the purpose of changing or influencing control of TeraWulf. The filing also notes the position is held other than in connection with any transaction having that control-related purpose or effect.

What is the key purpose of this amended Schedule 13G for TeraWulf (WULF)?

The amended Schedule 13G updates Jane Street’s beneficial ownership disclosure in TeraWulf common stock. It confirms a 4.2% stake, ownership of 5 percent or less of the class, the shared voting and dispositive powers, and the non-control intent certification required under the relevant SEC rules.

Which date triggers Jane Street’s ownership reporting for TeraWulf (WULF)?

The statement identifies December 31, 2025 as the date of the event requiring the filing. That date is the reference point for the reported 17,677,746 beneficially owned shares and the 4.2% ownership of TeraWulf’s common stock class.