TeraWulf director buys 6,085 shares at $14.785

A TERAWULF director increased his direct common-stock holdings through a September 15, 2026 open-market purchase.

Rhea-AI Filing Summary

TERAWULF INC. (WULF) director Michael C. Bucella reported buying 6,085 shares of common stock on September 15, 2026 in an open-market or private transaction at $14.785 per share. Following this purchase, he directly holds 350,789 shares of TERAWULF common stock, and no Rule 10b5-1 trading plan is reported.

Insider Trade Summary

Net Buyer: 6,085 shares

Net Buy 1 txn

Insider Bucella Michael C.

Role Director

Bought 6,085 shs ($90K)

Type	Security	Shares	Price	Value
Purchase	Common stock, $0.001 par value per share	6,085	$14.785	$90K

Holdings After Transaction: Common stock, $0.001 par value per share — 350,789 shares (Direct)

Key Figures

Shares purchased: 6,085 shares Purchase price per share: $14.785 per share Total shares held after purchase: 350,789 shares +1 more

4 metrics

Shares purchased 6,085 shares Common stock bought by director on September 15, 2026

Purchase price per share $14.785 per share Price paid for TERAWULF common stock in the reported transaction

Total shares held after purchase 350,789 shares Director’s direct TERAWULF common-stock holdings following the transaction

Net shares bought in period 6,085 shares Net buying activity reported for this Form 4 filing

Key Terms

open-market or private transaction, Rule 10b5-1 trading plan, beneficial ownership

3 terms

open-market or private transaction financial

"reported as a purchase in an open-market or private transaction"

Rule 10b5-1 trading plan regulatory

"no Rule 10b5-1 trading plan is reported for this transaction"

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

beneficial ownership financial

"describes the director’s beneficial ownership of TERAWULF common stock after the purchase"

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did TERAWULF INC. (WULF) disclose?

TERAWULF INC. disclosed that director Michael C. Bucella purchased 6,085 shares of its common stock on September 15, 2026 in an open-market or private transaction at $14.785 per share.

How many TERAWULF (WULF) shares does Michael C. Bucella now hold?

After the reported transaction, Michael C. Bucella directly holds 350,789 shares of TERAWULF INC. common stock, according to the filing.

Was the TERAWULF (WULF) insider purchase under a Rule 10b5-1 plan?

No. The filing indicates that no Rule 10b5-1 trading plan is reported in connection with Michael C. Bucella’s purchase of TERAWULF shares.

On what date did the TERAWULF (WULF) insider buy 6,085 shares?

The reported purchase of 6,085 TERAWULF common shares by director Michael C. Bucella occurred on September 15, 2026.

What price did the TERAWULF (WULF) director pay per share?

Director Michael C. Bucella paid $14.785 per share for the 6,085 TERAWULF INC. common shares purchased on September 15, 2026.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 09/16/2026 - 09:41 PM Accepted by SEC EDGAR 09/16/2026 - 09:41 PM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Bucella Michael C.

(Last) (First) (Middle)

C/O TERAWULF INC.

9 FEDERAL STREET

(Street)

EASTON MARYLAND 21601

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
TERAWULF INC. [ WULF ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/15/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction 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, $0.001 par value per share	09/15/2026		P		6,085	A	$14.785	350,789	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction 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 (Month/Day/Year)		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: 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

Explanation of Responses:

Remarks:

	/s/ Stefanie C. Fleischmann, as attorney-in-fact for Michael C. Bucella	09/16/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)