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  4. [Form 4] TERAWULF INC. Insider Trading Activity

TeraWulf (WULF) director buys 5,883 shares in August

Filing Impact
(Neutral)
Filing Sentiment
(Positive)
Form Type
4

Rhea-AI Filing Summary

Director Michael C. Bucella of TERAWULF INC. (WULF) reported two open-market purchases of common stock. On August 14, 2026, he purchased 3,023 shares at $16.535 per share, and on August 17, 2026 he purchased 2,860 shares at $17.47 per share. In total, these transactions reflect net purchases of 5,883 shares of common stock held directly. The company’s Rule 10b5-1 checkbox was not marked as being under a trading plan.

Positive

  • None.

Negative

  • None.
Insider Bucella Michael C.
Role Director
Bought 5,883 shs ($100K)
Type Security Shares Price Value
Purchase Common stock, $0.001 par value per share 2,860 $17.47 $50K
Purchase Common stock, $0.001 par value per share 3,023 $16.535 $50K
Holdings After Transaction: Common stock, $0.001 par value per share — 344,704 shares (Direct)
Shares purchased on 2026-08-14 3,023 shares Non-derivative open-market purchase of common stock
Price per share on 2026-08-14 $16.535 per share Purchase price for 3,023 common shares
Shares purchased on 2026-08-17 2,860 shares Non-derivative open-market purchase of common stock
Price per share on 2026-08-17 $17.47 per share Purchase price for 2,860 common shares
Total shares purchased 5,883 shares Net buy volume across both reported transactions
non-derivative financial
"reported as non-derivative open-market purchases of common stock"
par value financial
"Common stock, $0.001 par value per share"
Par value is the fixed amount printed on a bond or stock that represents its original value when issued. It’s like the face value of a coin or bill—what the issuer promises to pay back or the starting price of a stock—though it often doesn’t change with market prices. It matters because it helps determine certain financial details, like how much the company will pay back at maturity.
Rule 10b5-1 regulatory
"The company’s Rule 10b5-1 checkbox was not marked as being under a trading plan"
Rule 10b5-1 is a regulation that allows company insiders to buy or sell their shares at predetermined times, even if they have access to non-public information. It acts like setting a schedule in advance for transactions, helping prevent accusations of unfair trading. This rule provides a way for insiders to plan trades transparently, giving investors confidence that these transactions are not based on hidden information.

FAQ

What insider transactions did TERAWULF INC. (WULF) director Michael C. Bucella report?
He reported two open-market purchases of TERAWULF common stock, totaling 5,883 shares, executed on August 14, 2026 and August 17, 2026, and held directly.

How many TERAWULF (WULF) shares did Michael C. Bucella buy on August 14, 2026?
On August 14, 2026, he purchased 3,023 shares of TERAWULF common stock at a price of $16.535 per share in an open-market or private transaction coded as a purchase.

What was the August 17, 2026 TERAWULF (WULF) insider purchase by Michael C. Bucella?
On August 17, 2026, he bought 2,860 shares of TERAWULF common stock at $17.47 per share, reported as a non-derivative open-market or private purchase held directly.

What is the total number of TERAWULF (WULF) shares bought in these Form 4 transactions?
Across both reported transactions, Michael C. Bucella acquired 5,883 shares of TERAWULF common stock, all categorized as direct, non-derivative purchases in open-market or private transactions.

Were Michael C. Bucella’s TERAWULF (WULF) purchases made under a Rule 10b5-1 plan?
The filing’s Rule 10b5-1 checkbox was not marked as being pursuant to a trading plan, indicating these purchases were not affirmatively reported as made under Rule 10b5-1.

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

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Form 4 Insider Transactions: What Each Field Means →
SEC Form 4
FORM 4UNITED 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)
XDirector10% Owner
Officer (give title below)Other (specify below)
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
08/14/2026		6. Individual or Joint/Group Filing (Check Applicable Line)
XForm 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)
CodeVAmount(A) or (D)Price
Common stock, $0.001 par value per share08/14/2026P3,023A$16.535341,844D
Common stock, $0.001 par value per share08/17/2026P2,860A$17.47344,704D
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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Explanation of Responses:
Remarks:
/s/ Stefanie C. Fleischmann, as attorney-in-fact for Michael C. Bucella08/17/2026
** Signature of Reporting PersonDate
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)

Source: View Original Filing on SEC EDGAR