William J. Tanimoto - 09 Jan 2026 Form 4 Insider Report for TERAWULF INC. (WULF)

Role: Chief Accounting Officer
Signature: /s/ Stefanie C. Fleischmann, as attorney-in-fact for William J. Tanimoto
Issuer symbol: WULF
Transactions as of: 09 Jan 2026
Net transactions value: $0
Form type: 4
Filing time: 09 Jan 2026, 20:23:14 UTC
Previous filing: 05 Jan 2026
Next filing: 16 Jan 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Tanimoto William Joseph	Chief Accounting Officer	C/O TERAWULF INC., 9 FEDERAL STREET, EASTON	/s/ Stefanie C. Fleischmann, as attorney-in-fact for William J. Tanimoto	09 Jan 2026	0002074786

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	WULF	Common stock, $0.001 par value per share	Options Exercise		+16,667	+61%		44,194	09 Jan 2026	Direct	F1
transaction	WULF	Common stock, $0.001 par value per share	Disposed to Issuer		-5,296	-12%		38,898	09 Jan 2026	Direct	F2

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	WULF	Restricted Stock Units	Options Exercise		-16,667	-50%		16,666	09 Jan 2026	Common stock, $0.001 par value per share	16,667		Direct	F3, F4

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	The Reporting Person received restricted stock units which vested in accordance with their terms upon the second anniversary of January 9, 2024, as reflected in this Form 4, subject to the Reporting Person's continued employment or service with the Issuer through such date.
F2	The disposition is due to withholding to cover taxes, as a result of the Reporting Person's election of net settlement with regard to the vesting of restricted stock units, which vested on January 9, 2026, as reflected in this Form 4.
F3	Each Restricted Stock Unit represents a contingent right to receive one share of the Issuer's common stock, $0.001 par value per share.
F4	The restricted stock units vested upon the second anniversary of January 9, 2024, subject to the Reporting Person's continued employment or service with the Issuer through each such date. The remaining restricted stock units will vest upon the third anniversary of January 9, 2024, subject to the Reporting Person's continued employment or service with the Issuer through each such date.