TERAWULF INC. (WULF)

Data as of Oct 2, 2026, from SEC Form 4 filings.

Net insider selling (90d)Watch WULF

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Latest WULF insider trades

Michael C. Bucella - Director
Open-market purchase$90K
Sep 15, 2026
Catherine J. Motz - Director
Open-market sale$998K
Sep 8, 2026
Walter E. Carter - Director
Open-market sale$1.98M
Aug 31, 2026
Paul B. Prager - Officer
Open-market sale$2.35M
Aug 27, 2026
Michael C. Bucella - Director
Open-market purchase$50K
Aug 14, 2026
Michael C. Bucella - Director
Open-market purchase$50K
Aug 17, 2026
Paul B. Prager - Officer
Open-market sale$3.66M
Jun 29, 2026
Paul B. Prager - Officer
Open-market sale$4.07M
May 26, 2026

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We read every Form 4 as it is filed, WULF's included, and rank the insider purchases worth a look into a daily trading plan.

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WULF key statistics

Key statistics for WULF are not available right now.

Filings (90d)

Form 4

Purchases (90d)

$190K

Sales (90d)

$5.32M

Market cap

WULF insider sentiment, last 90 days

How the dollar value of insider trades on Form 4 split between purchases and sales.

3% Buying97% Selling

3 insider purchases totaling $190K against 3 sales totaling $5.32M.

Most active WULF insiders in the last 90 days

About TERAWULF INC. (WULF)

The SEC lists TERAWULF INC. under CIK 0001083301, in finance services. We track it alongside the rest of the Financials sector.

Sector: Financials

SEC filings for WULF on EDGAR

WULF Form 4 activity by transaction type, last 90 days

Form 4 transaction type	Transactions	Shares	Total value
Open-market purchase	3	11,968	$190K
Open-market sale	3	324,149	$5.32M
Grant or award	3	5,492
Option exercise	8	3,346,666
Derivative transaction	1	276,500
Other acquisition / disposition	3	3,700,000

Dollar totals cover purchases and sales only (codes P and S). Grants, option exercises, gifts and tax withholding are counted in shares, because none of them is a trade at a market price.

WULF insider transactions (Form 4)

103 Form 4 filings on record, the earliest from Oct 2, 2024, newest first. Filing history page 1 of 3.

Date	Insider	Transaction	Security	Shares	Price	Value
Sep 30, 2026	Lisa A. Prager - Director	Grant or award	Common stock, $0.001 par value per share	1,690^{footnote F1}	-^{footnote F1}	-
Footnote F1 (price, shares): Shares of common stock issued pursuant to the Issuer's Non-Employee Director Compensation Policy in lieu of cash retainers accrued since the beginning of the third fiscal quarter of 2026, at a price of $14.80 per share, the closing price on September 30, 2026.
Sep 30, 2026	Walter E. Carter - Director	Grant or award	Common stock, $0.001 par value per share	2,112^{footnote F1}	-^{footnote F1}	-
Footnote F1 (price, shares): Shares of common stock issued pursuant to the Issuer's Non-Employee Director Compensation Policy in lieu of cash retainers accrued since the beginning of the third fiscal quarter of 2026, at a price of $14.80 per share, the closing price on September 30, 2026.
Sep 30, 2026	Michael C. Bucella - Director	Grant or award	Common stock, $0.001 par value per share	1,690^{footnote F1}	-^{footnote F1}	-
Footnote F1 (price, shares): Shares of common stock issued pursuant to the Issuer's Non-Employee Director Compensation Policy in lieu of cash retainers accrued since the beginning of the third fiscal quarter of 2026, at a price of $14.80 per share, the closing price on September 30, 2026.
Sep 29, 2026	Nazar M. Khan - Officer	Option exercise	Common stock, $0.001 par value per share	666,667	-^{footnote F1}	-
Sep 29, 2026	Nazar M. Khan - Officer	Option exercise	Restricted Stock Units	666,667	-^{footnote F8}	-
Footnote F1 (price): The Reporting Person received restricted stock units which vested in accordance with their terms, as amended in the manner described below in Footnote 8 of this Form 4, on September 29, 2026, subject to the Reporting Person's continued employment or service with TeraWulf Inc… Full note on SEC EDGAR Footnote F8 (price): The restricted stock units were scheduled to vest upon the first anniversary of August 1, 2025, subject to the Reporting Person's continued employment or service with the Issuer through such date. On July 31, 2026, the Reporting Person and the Issuer mutually agreed to defer… Full note on SEC EDGAR
Sep 22, 2026	Paul B. Prager - Officer	Other	Forward sale contract (obligation to sell)	3,000,000	-^{footnote F1}	-
Footnote F1 (price): On September 22, 2026, Riesling Power LLC ("Riesling Power") entered into a prepaid variable share forward contract / loan facility (the "Contract") of approximately 14 months duration with an unaffiliated dealer with a pledge of up to a maximum of 3,000,000 shares of common… Full note on SEC EDGAR
Sep 15, 2026	Michael C. Bucella - Director	Open-market purchase	Common stock, $0.001 par value per share	6,085	$14.79	$90K
Sep 10, 2026	Nazar M. Khan - Officer	Other	Forward sale contract (obligation to sell)	350,000	-^{footnote F1,F2}	-
Sep 10, 2026	Nazar M. Khan - Officer	Other	Forward sale contract (obligation to sell)	350,000	-^{footnote F1,F2}	-
Footnote F1 (price): On September 19, 2025, Lake Harriet Holdings, LLC ("Lake Harriet Holdings") entered into a prepaid variable share forward contract / loan facility (the "Original Contract") with an unaffiliated dealer with a pledge of up to a maximum of 350,000 shares of common stock, par value… Full note on SEC EDGAR Footnote F2 (price): (Continued from footnote 1) The Amended Contract can be settled in cash or Common Stock and/or refinanced, at Lake Harriet Holdings' option. In exchange for assuming the obligation under the Original Contract, Lake Harriet Holdings received a cash payment in September 2025… Full note on SEC EDGAR
Sep 8, 2026	Catherine J. Motz - Director	Open-market sale	Common stock, $0.001 par value per share	56,023	$17.81^{footnote F1}	$998K
Footnote F1 (price): The Price reported in Column 4 is a weighted average price. The shares of common stock, par value $0.001 per share ("Common Stock"), of TeraWulf Inc. were sold in multiple transactions at a price ranging from $17.71 to $17.99, inclusive. The Reporting Person undertakes to… Full note on SEC EDGAR
Aug 31, 2026	Walter E. Carter - Director	Open-market sale	Common stock, $0.001 par value per share	130,626	$15.14	$1.98M
Aug 27, 2026	Paul B. Prager - Officer	Open-market sale	Common stock, $0.001 par value per share	137,500	$17.06^{footnote F2}	$2.35M
Footnote F2 (price): The Price reported in Column 4 is a weighted average price. The shares of common stock, par value $0.001 per share ("Common Stock") were sold in multiple transactions at a price ranging from $17.0100 to $17.1150, inclusive. The Reporting Person undertakes to provide to the staff… Full note on SEC EDGAR
Aug 14, 2026	Michael C. Bucella - Director	Open-market purchase	Common stock, $0.001 par value per share	3,023	$16.54	$50K
Aug 17, 2026	Michael C. Bucella - Director	Open-market purchase	Common stock, $0.001 par value per share	2,860	$17.47	$50K
Aug 16, 2026	William Joseph Tanimoto - Officer	Option exercise	Common stock, $0.001 par value per share	6,666	-^{footnote F1}	-
Aug 16, 2026	William Joseph Tanimoto - Officer	Option exercise	Restricted Stock Units	6,666	-^{footnote F3}	-
Footnote F1 (price): The Reporting Person received Restricted Stock Units which vested in accordance with their terms upon the third anniversary of August 16, 2023, as reported in this Form 4, subject to the Reporting Person's continued employment or service with the Issuer through such date. Footnote F3 (price): The restricted stock units vested in accordance with their terms upon the third anniversary of August 16, 2023, subject to the Reporting Person's continued employment or service with the Issuer through each such date.
Aug 1, 2026	Kerri M. Langlais - Officer	Option exercise	Common stock, $0.001 par value per share	500,000	-^{footnote F1}	-
Aug 3, 2026	Kerri M. Langlais - Officer	Derivative	Common stock, $0.001 par value per share	276,500	-^{footnote F2}	-
Aug 1, 2026	Kerri M. Langlais - Officer	Option exercise	Restricted Stock Units	500,000	-^{footnote F4}	-
Footnote F1 (price): The Reporting Person received restricted stock units which vested in accordance with their terms upon the first anniversary of August 1, 2025, as reflected in this Form 4, subject to the Reporting Person's continued employment or service with the Issuer through such date. Footnote F2 (price): 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 August 1, 2026, as reflected in this Form 4. Footnote F4 (price): The restricted stock units vested upon the first anniversary of August 1, 2025, subject to the Reporting Person's continued employment or service with the Issuer through such date. The remaining restricted stock units will vest ratably upon the second and third anniversaries of… Full note on SEC EDGAR
Aug 1, 2026	Patrick Fleury - Officer	Option exercise	Common stock, $0.001 par value per share	500,000	-^{footnote F1}	-
Aug 1, 2026	Patrick Fleury - Officer	Option exercise	Restricted Stock Units	500,000	-^{footnote F4}	-
Footnote F1 (price): The Reporting Person received restricted stock units which vested in accordance with their terms upon the first anniversary of August 1, 2025, as reflected in this Form 4, subject to the Reporting Person's continued employment or service with the Issuer through such date. Footnote F4 (price): The restricted stock units vested upon the first anniversary of August 1, 2025, subject to the Reporting Person's continued employment or service with the Issuer through such date. The remaining restricted stock units will vest ratably upon the second and third anniversaries of… Full note on SEC EDGAR
Jun 29, 2026	Paul B. Prager - Officer	Open-market sale	Common stock, $0.001 par value per share	137,500	$26.60^{footnote F1}	$3.66M
Footnote F1 (price): The Price reported in Column 4 is a weighted average price. The shares of common stock, par value $0.001 per share ("Common Stock") were sold in multiple transactions at a price ranging from $26.5800 to $27.5799, inclusive. The reporting person undertakes to provide to the staff… Full note on SEC EDGAR
Jun 30, 2026	Lisa A. Prager - Director	Grant or award	Common stock, $0.001 par value per share	1,013	-^{footnote F1}	-
Footnote F1 (price): Shares of common stock issued in lieu of cash retainers accrued since the beginning of the second fiscal quarter of 2026, at a price of $24.70 per share, the closing price as of June 30, 2026.
Jun 30, 2026	Walter E. Carter - Director	Grant or award	Common stock, $0.001 par value per share	1,266	-^{footnote F1}	-
Footnote F1 (price): Shares of common stock issued in lieu of cash retainers accrued since the beginning of the second fiscal quarter of 2026, at a price of $24.70 per share, the closing price as of June 30, 2026
Jun 30, 2026	Michael C. Bucella - Director	Grant or award	Common stock, $0.001 par value per share	1,013	-^{footnote F1}	-
Footnote F1 (price): Shares of common stock issued in lieu of cash retainers accrued since the beginning of the second fiscal quarter of 2026, at a price of $24.70 per share, the closing price as of June 30, 2026
Jun 24, 2026	William Joseph Tanimoto - Officer	Option exercise	Common stock, $0.001 par value per share	10,000	-^{footnote F1}	-
Jun 24, 2026	William Joseph Tanimoto - Officer	Option exercise	Restricted Stock Units	10,000	-^{footnote F4}	-
Footnote F1 (price): The Reporting Person received Restricted Stock Units which vested in accordance with their terms upon the first anniversary of June 24, 2025, as reported in this Form 4, subject to the Reporting Person's continued employment or service with the Issuer through such date. Footnote F4 (price): The remaining Restricted Stock Units will vest in accordance with their terms on each of the second and third anniversaries of June 24, 2025, subject to the Reporting Person's continued employment or service with the Issuer through each such date.
Jun 23, 2026	Lisa A. Prager - Director	Grant or award	Restricted Stock Units	6,950	$0.00	-
Jun 23, 2026	Lisa A. Prager - Director	Option exercise	Common stock, $0.001 par value per share	56,023	-^{footnote F1}	-
Jun 23, 2026	Lisa A. Prager - Director	Option exercise	Restricted Stock Units	56,023	$0.00	-
Footnote F1 (price): The Reporting Person received restricted stock units which vested upon the first anniversary of June 23, 2025, as reported in this Form 4, subject to the Reporting Person's continued employment or service with the Issuer through such date.
Jun 23, 2026	Steven T. Pincus - Director	Grant or award	Restricted Stock Units	7,818	$0.00	-
Jun 23, 2026	Steven T. Pincus - Director	Option exercise	Common stock, $0.001 par value per share	63,026	-^{footnote F1}	-
Jun 23, 2026	Steven T. Pincus - Director	Option exercise	Restricted Stock Units	63,026	$0.00	-
Footnote F1 (price): The Reporting Person received restricted stock units which vested upon the first anniversary of June 23, 2025, as reported in this Form 4, subject to the Reporting Person's continued employment or service with the Issuer through such date.
Jun 23, 2026	Catherine J. Motz - Director	Option exercise	Common stock, $0.001 par value per share	56,023	-^{footnote F1}	-
Jun 23, 2026	Catherine J. Motz - Director	Option exercise	Restricted Stock Units	56,023	$0.00	-
Jun 23, 2026	Catherine J. Motz - Director	Grant or award	Restricted Stock Units	6,950	$0.00	-
Footnote F1 (price): The Reporting Person received restricted stock units which vested upon the first anniversary of June 23, 2025, as reported in this Form 4, subject to the Reporting Person's continued employment or service with the Issuer through such date.
Jun 23, 2026	Amanda Fabiano - Director	Grant or award	Restricted Stock Units	6,950	$0.00	-
Jun 23, 2026	Amanda Fabiano - Director	Option exercise	Common stock, $0.001 par value per share	56,023	-^{footnote F1}	-
Jun 23, 2026	Amanda Fabiano - Director	Option exercise	Restricted Stock Units	56,023	$0.00	-
Footnote F1 (price): The Reporting Person received restricted stock units which vested upon the first anniversary of June 23, 2025, as reported in this Form 4, subject to the Reporting Person's continued employment or service with the Issuer through such date.
Jun 23, 2026	Walter E. Carter - Director	Grant or award	Restricted Stock Units	6,950	$0.00	-
Jun 23, 2026	Walter E. Carter - Director	Option exercise	Common stock, $0.001 par value per share	56,023	-^{footnote F1}	-
Jun 23, 2026	Walter E. Carter - Director	Option exercise	Restricted Stock Units	56,023	$0.00	-
Footnote F1 (price): The Reporting Person received restricted stock units which vested upon the first anniversary of June 23, 2025, as reported in this Form 4, subject to the Reporting Person's continued employment or service with the Issuer through such date.
Jun 23, 2026	Michael C. Bucella - Director	Option exercise	Restricted Stock Units	56,023	$0.00	-
Jun 23, 2026	Michael C. Bucella - Director	Grant or award	Restricted Stock Units	6,950	$0.00	-
Jun 23, 2026	Michael C. Bucella - Director	Option exercise	Common stock, $0.001 par value per share	56,023	-^{footnote F1}	-
Footnote F1 (price): The Reporting Person received restricted stock units which vested upon the first anniversary of June 23, 2025, as reported in this Form 4, subject to the Reporting Person's continued employment or service with the Issuer through such date.
May 26, 2026	Paul B. Prager - Officer	Open-market sale	Common stock, $0.001 par value per share	166,650	$24.43^{footnote F1}	$4.07M
May 27, 2026	Paul B. Prager - Officer	Open-market sale	Common stock, $0.001 par value per share	109,849	$25.58^{footnote F3}	$2.81M
May 27, 2026	Paul B. Prager - Officer	Open-market sale	Common stock, $0.001 par value per share	56,801	$26.57^{footnote F4}	$1.51M
Footnote F1 (price): The Price reported in Column 4 is a weighted average price. The shares of common stock, par value $0.001 per share ("Common Stock") were sold in multiple transactions at a price ranging from $24.2700 to $25.2699, inclusive. The reporting person undertakes to provide to the staff… Full note on SEC EDGAR Footnote F3 (price): The Price reported in Column 4 is a weighted average price. The shares of Common Stock were sold in multiple transactions at a price ranging from $24.9500 to $25.9499, inclusive. The reporting person undertakes to provide to the staff of the Securities and Exchange Commission… Full note on SEC EDGAR Footnote F4 (price): The Price reported in Column 4 is a weighted average price. The shares of Common Stock were sold in multiple transactions at a price ranging from $25.9500 to $26.9499, inclusive. The reporting person undertakes to provide to the staff of the Securities and Exchange Commission… Full note on SEC EDGAR
May 18, 2026	Paul B. Prager - Officer	Option exercise	Common stock, $0.001 par value per share	981,161	-^{footnote F1}	-
May 18, 2026	Paul B. Prager - Officer	Derivative	Common stock, $0.001 par value per share	542,582	-^{footnote F2}	-
May 18, 2026	Paul B. Prager - Officer	Option exercise	Performance-Based Restricted Stock Units	981,161	$0.00	-
Footnote F1 (price): The performance stock units vested in accordance with their terms upon the achievement of specified performance goals between the grant date and the third anniversary of January 2, 2026, subject to the Reporting Person's continued employment or service with the Issuer through… Full note on SEC EDGAR Footnote F2 (price): The disposition is due to withholding to cover taxes, as a result of the Reporting Person's election of net settlement of performance stock units, which vested in accordance with their terms upon the achievement of specified performance goals between the grant date and the third… Full note on SEC EDGAR
May 18, 2026	Nazar M. Khan - Officer	Option exercise	Common stock, $0.001 par value per share	817,634	-^{footnote F1}	-
May 18, 2026	Nazar M. Khan - Officer	Derivative	Common stock, $0.001 par value per share	452,151	-^{footnote F2}	-
May 18, 2026	Nazar M. Khan - Officer	Option exercise	Performance-Based Restricted Stock Units	817,634	$0.00	-
Footnote F1 (price): The performance stock units vested in accordance with their terms upon the achievement of specified performance goals between the grant date and the third anniversary of January 2, 2026, subject to the Reporting Person's continued employment or service with the Issuer through… Full note on SEC EDGAR Footnote F2 (price): The disposition is due to withholding to cover taxes, as a result of the Reporting Person's election of net settlement of performance stock units, which vested in accordance with their terms upon the achievement of specified performance goals between the grant date and the third… Full note on SEC EDGAR
May 18, 2026	Kerri M. Langlais - Officer	Option exercise	Performance-Based Restricted Stock Units	327,054	$0.00	-
May 18, 2026	Kerri M. Langlais - Officer	Option exercise	Common stock, $0.001 par value per share	327,054	-^{footnote F1}	-
May 18, 2026	Kerri M. Langlais - Officer	Derivative	Common stock, $0.001 par value per share	180,860	-^{footnote F2}	-
Footnote F1 (price): The performance stock units vested in accordance with their terms upon the achievement of specified performance goals between the grant date and the third anniversary of January 2, 2026, subject to the Reporting Person's continued employment or service with the Issuer through… Full note on SEC EDGAR Footnote F2 (price): The disposition is due to withholding to cover taxes, as a result of the Reporting Person's election of net settlement of performance stock units, which vested in accordance with their terms upon the achievement of specified performance goals between the grant date and the third… Full note on SEC EDGAR
May 18, 2026	Patrick Fleury - Officer	Option exercise	Common stock, $0.001 par value per share	327,054	-^{footnote F1}	-
May 18, 2026	Patrick Fleury - Officer	Derivative	Common stock, $0.001 par value per share	128,695	-^{footnote F2}	-
May 18, 2026	Patrick Fleury - Officer	Option exercise	Performance-Based Restricted Stock Units	327,054	$0.00	-
Footnote F1 (price): The performance stock units vested in accordance with their terms upon the achievement of specified performance goals between the grant date and the third anniversary of January 2, 2026, subject to the Reporting Person's continued employment or service with the Issuer through… Full note on SEC EDGAR Footnote F2 (price): The disposition is due to withholding to cover taxes, as a result of the Reporting Person's election of net settlement of performance stock units, which vested in accordance with their terms upon the achievement of specified performance goals between the grant date and the third… Full note on SEC EDGAR

Recent WULF Form 8-K filings

Read WULF company news

Oct 5, 2026Item 8.01, 9.01

Read the filing on SEC EDGAR

Aug 5, 2026Item 2.02, 7.01, 9.01

Read the filing on SEC EDGAR

Jul 6, 2026Item 8.01, 9.01

Read the filing on SEC EDGAR

Jun 10, 2026Item 5.07

Read the filing on SEC EDGAR

May 26, 2026Item 8.01, 9.01

Read the filing on SEC EDGAR

Recent WULF Form 144 notices of proposed sale

An insider files Form 144 before selling restricted or control stock. It announces a planned sale. If the sale goes ahead, it shows up later on a Form 4.

Filed	Filer	Relationship	Shares	Market value	Notice
Sep 22, 2026	Prager Paul B.	Officer, Director	3,000,000	$52.35M	View on EDGAR
Sep 8, 2026	Motz Catherine J.	Director	56,023	$996K	View on EDGAR
Sep 1, 2026	Carter, Walter E.	Director	130,626	$1.98M	View on EDGAR

WULF insider trading FAQ

What is the latest insider trade for WULF?

TERAWULF INC. (WULF) had 14 insider filings in the last 90 days, with the most recent on 2026-10-02. The full record for WULF runs to 103 Form 4 filings, the earliest from 2024-10-02. InsiderAlpha adds new Form 4, Form 144 and 8-K filings as they arrive from SEC EDGAR.

How many insiders are buying WULF stock?

3 insider purchases of WULF were filed in the last 90 days, totaling $190K.

How many insiders are selling WULF stock?

3 insider sales of WULF were filed in the last 90 days, totaling $5.32M.

Where can I see WULF SEC filings (Form 4, 10-K, 10-Q, 8-K)?

This page collects WULF Form 4 insider transactions, Form 144 sale notices and 8-K filings in one place. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.

More Financials companies with insider activity

Recent insider filings

The EDGAR links open each original Form 4, so you can check any number on this page against the filing it came from.

Oct 2, 2026 - Lisa A. Prager view on EDGAR
Oct 2, 2026 - Walter E. Carter view on EDGAR
Oct 2, 2026 - Michael C. Bucella view on EDGAR
Sep 30, 2026 - Nazar M. Khan view on EDGAR
Sep 23, 2026 - Paul B. Prager view on EDGAR
Sep 17, 2026 - Michael C. Bucella view on EDGAR
Sep 12, 2026 - Nazar M. Khan view on EDGAR
Sep 10, 2026 - Catherine J. Motz view on EDGAR
Sep 1, 2026 - Walter E. Carter view on EDGAR
Aug 29, 2026 - Paul B. Prager view on EDGAR

Related companies with recent insider activity

Learn more

Insider selling: signal or noise?: Why most insider sales are routine, and the few patterns worth a second look.
Form 144 vs Form 4: A Form 144 announces a planned sale; the Form 4 reports it after it happens.
Insider activity in Financials: Where WULF's peers are being bought and sold.
Every recent Form 4: The market-wide feed, updated as filings arrive from SEC EDGAR.

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Form 4 transaction type

Transactions

Total value

Open-market purchase

11,968

$190K

Open-market sale

324,149

$5.32M

Grant or award

5,492

Option exercise

3,346,666

Derivative transaction

276,500

Other acquisition / disposition

3,700,000

Date

Insider

Transaction

Security

Price

Value

Sep 30, 2026

Lisa A. Prager - Director

Grant or award

Common stock, $0.001 par value per share

1,690^{footnote F1}

-^{footnote F1}

Footnote F1 (price, shares): Shares of common stock issued pursuant to the Issuer's Non-Employee Director Compensation Policy in lieu of cash retainers accrued since the beginning of the third fiscal quarter of 2026, at a price of $14.80 per share, the closing price on September 30, 2026.

Sep 30, 2026

Walter E. Carter - Director

Grant or award

Common stock, $0.001 par value per share

2,112^{footnote F1}

-^{footnote F1}

Footnote F1 (price, shares): Shares of common stock issued pursuant to the Issuer's Non-Employee Director Compensation Policy in lieu of cash retainers accrued since the beginning of the third fiscal quarter of 2026, at a price of $14.80 per share, the closing price on September 30, 2026.

Sep 30, 2026

Michael C. Bucella - Director

Grant or award

Common stock, $0.001 par value per share

1,690^{footnote F1}

-^{footnote F1}

Footnote F1 (price, shares): Shares of common stock issued pursuant to the Issuer's Non-Employee Director Compensation Policy in lieu of cash retainers accrued since the beginning of the third fiscal quarter of 2026, at a price of $14.80 per share, the closing price on September 30, 2026.

Sep 29, 2026

Nazar M. Khan - Officer

Option exercise

Common stock, $0.001 par value per share

666,667

-^{footnote F1}

Sep 29, 2026

Nazar M. Khan - Officer

Option exercise

Restricted Stock Units

666,667

-^{footnote F8}

Footnote F1 (price): The Reporting Person received restricted stock units which vested in accordance with their terms, as amended in the manner described below in Footnote 8 of this Form 4, on September 29, 2026, subject to the Reporting Person's continued employment or service with TeraWulf Inc… Full note on SEC EDGAR
Footnote F8 (price): The restricted stock units were scheduled to vest upon the first anniversary of August 1, 2025, subject to the Reporting Person's continued employment or service with the Issuer through such date. On July 31, 2026, the Reporting Person and the Issuer mutually agreed to defer… Full note on SEC EDGAR

Sep 22, 2026

Paul B. Prager - Officer

Other

Forward sale contract (obligation to sell)

3,000,000

-^{footnote F1}

Footnote F1 (price): On September 22, 2026, Riesling Power LLC ("Riesling Power") entered into a prepaid variable share forward contract / loan facility (the "Contract") of approximately 14 months duration with an unaffiliated dealer with a pledge of up to a maximum of 3,000,000 shares of common… Full note on SEC EDGAR

Sep 15, 2026

Michael C. Bucella - Director

Open-market purchase

Common stock, $0.001 par value per share

6,085

$14.79

$90K

Sep 10, 2026

Nazar M. Khan - Officer

Other

Forward sale contract (obligation to sell)

350,000

-^{footnote F1,F2}

Sep 10, 2026

Nazar M. Khan - Officer

Other

Forward sale contract (obligation to sell)

350,000

-^{footnote F1,F2}

Footnote F1 (price): On September 19, 2025, Lake Harriet Holdings, LLC ("Lake Harriet Holdings") entered into a prepaid variable share forward contract / loan facility (the "Original Contract") with an unaffiliated dealer with a pledge of up to a maximum of 350,000 shares of common stock, par value… Full note on SEC EDGAR
Footnote F2 (price): (Continued from footnote 1) The Amended Contract can be settled in cash or Common Stock and/or refinanced, at Lake Harriet Holdings' option. In exchange for assuming the obligation under the Original Contract, Lake Harriet Holdings received a cash payment in September 2025… Full note on SEC EDGAR

Sep 8, 2026

Catherine J. Motz - Director

Open-market sale

Common stock, $0.001 par value per share

56,023

$17.81^{footnote F1}

$998K

Footnote F1 (price): The Price reported in Column 4 is a weighted average price. The shares of common stock, par value $0.001 per share ("Common Stock"), of TeraWulf Inc. were sold in multiple transactions at a price ranging from $17.71 to $17.99, inclusive. The Reporting Person undertakes to… Full note on SEC EDGAR

Aug 31, 2026

Walter E. Carter - Director

Open-market sale

Common stock, $0.001 par value per share

130,626

$15.14

$1.98M

Aug 27, 2026

Paul B. Prager - Officer

Open-market sale

Common stock, $0.001 par value per share

137,500

$17.06^{footnote F2}

$2.35M

Footnote F2 (price): The Price reported in Column 4 is a weighted average price. The shares of common stock, par value $0.001 per share ("Common Stock") were sold in multiple transactions at a price ranging from $17.0100 to $17.1150, inclusive. The Reporting Person undertakes to provide to the staff… Full note on SEC EDGAR

Aug 14, 2026

Michael C. Bucella - Director

Open-market purchase

Common stock, $0.001 par value per share

3,023

$16.54

$50K

Aug 17, 2026

Michael C. Bucella - Director

Open-market purchase

Common stock, $0.001 par value per share

2,860

$17.47

$50K

Aug 16, 2026

William Joseph Tanimoto - Officer

Option exercise

Common stock, $0.001 par value per share

6,666

-^{footnote F1}

Aug 16, 2026

William Joseph Tanimoto - Officer

Option exercise

Restricted Stock Units

6,666

-^{footnote F3}

Footnote F1 (price): The Reporting Person received Restricted Stock Units which vested in accordance with their terms upon the third anniversary of August 16, 2023, as reported in this Form 4, subject to the Reporting Person's continued employment or service with the Issuer through such date.
Footnote F3 (price): The restricted stock units vested in accordance with their terms upon the third anniversary of August 16, 2023, subject to the Reporting Person's continued employment or service with the Issuer through each such date.

Aug 1, 2026

Kerri M. Langlais - Officer

Option exercise

Common stock, $0.001 par value per share

500,000

-^{footnote F1}

Aug 3, 2026

Kerri M. Langlais - Officer

Derivative

Common stock, $0.001 par value per share

276,500

-^{footnote F2}

Aug 1, 2026

Kerri M. Langlais - Officer

Option exercise

Restricted Stock Units

500,000

-^{footnote F4}

Footnote F1 (price): The Reporting Person received restricted stock units which vested in accordance with their terms upon the first anniversary of August 1, 2025, as reflected in this Form 4, subject to the Reporting Person's continued employment or service with the Issuer through such date.
Footnote F2 (price): 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 August 1, 2026, as reflected in this Form 4.
Footnote F4 (price): The restricted stock units vested upon the first anniversary of August 1, 2025, subject to the Reporting Person's continued employment or service with the Issuer through such date. The remaining restricted stock units will vest ratably upon the second and third anniversaries of… Full note on SEC EDGAR

Aug 1, 2026

Patrick Fleury - Officer

Option exercise

Common stock, $0.001 par value per share

500,000

-^{footnote F1}

Aug 1, 2026

Patrick Fleury - Officer

Option exercise

Restricted Stock Units

500,000

-^{footnote F4}

Footnote F1 (price): The Reporting Person received restricted stock units which vested in accordance with their terms upon the first anniversary of August 1, 2025, as reflected in this Form 4, subject to the Reporting Person's continued employment or service with the Issuer through such date.
Footnote F4 (price): The restricted stock units vested upon the first anniversary of August 1, 2025, subject to the Reporting Person's continued employment or service with the Issuer through such date. The remaining restricted stock units will vest ratably upon the second and third anniversaries of… Full note on SEC EDGAR

Jun 29, 2026

Paul B. Prager - Officer

Open-market sale

Common stock, $0.001 par value per share

137,500

$26.60^{footnote F1}

$3.66M

Footnote F1 (price): The Price reported in Column 4 is a weighted average price. The shares of common stock, par value $0.001 per share ("Common Stock") were sold in multiple transactions at a price ranging from $26.5800 to $27.5799, inclusive. The reporting person undertakes to provide to the staff… Full note on SEC EDGAR

Jun 30, 2026

Lisa A. Prager - Director

Grant or award

Common stock, $0.001 par value per share

1,013

-^{footnote F1}

Footnote F1 (price): Shares of common stock issued in lieu of cash retainers accrued since the beginning of the second fiscal quarter of 2026, at a price of $24.70 per share, the closing price as of June 30, 2026.

Jun 30, 2026

Walter E. Carter - Director

Grant or award

Common stock, $0.001 par value per share

1,266

-^{footnote F1}

Footnote F1 (price): Shares of common stock issued in lieu of cash retainers accrued since the beginning of the second fiscal quarter of 2026, at a price of $24.70 per share, the closing price as of June 30, 2026

Jun 30, 2026

Michael C. Bucella - Director

Grant or award

Common stock, $0.001 par value per share

1,013

-^{footnote F1}

Footnote F1 (price): Shares of common stock issued in lieu of cash retainers accrued since the beginning of the second fiscal quarter of 2026, at a price of $24.70 per share, the closing price as of June 30, 2026

Jun 24, 2026

William Joseph Tanimoto - Officer

Option exercise

Common stock, $0.001 par value per share

10,000

-^{footnote F1}

Jun 24, 2026

William Joseph Tanimoto - Officer

Option exercise

Restricted Stock Units

10,000

-^{footnote F4}

Footnote F1 (price): The Reporting Person received Restricted Stock Units which vested in accordance with their terms upon the first anniversary of June 24, 2025, as reported in this Form 4, subject to the Reporting Person's continued employment or service with the Issuer through such date.
Footnote F4 (price): The remaining Restricted Stock Units will vest in accordance with their terms on each of the second and third anniversaries of June 24, 2025, subject to the Reporting Person's continued employment or service with the Issuer through each such date.

Jun 23, 2026

Lisa A. Prager - Director

Grant or award

Restricted Stock Units

6,950

$0.00

Jun 23, 2026

Lisa A. Prager - Director

Option exercise

Common stock, $0.001 par value per share

56,023

-^{footnote F1}

Jun 23, 2026

Lisa A. Prager - Director

Option exercise

Restricted Stock Units

56,023

$0.00

Footnote F1 (price): The Reporting Person received restricted stock units which vested upon the first anniversary of June 23, 2025, as reported in this Form 4, subject to the Reporting Person's continued employment or service with the Issuer through such date.

Jun 23, 2026

Steven T. Pincus - Director

Grant or award

Restricted Stock Units

7,818

$0.00

Jun 23, 2026

Steven T. Pincus - Director

Option exercise

Common stock, $0.001 par value per share

63,026

-^{footnote F1}

Jun 23, 2026

Steven T. Pincus - Director

Option exercise

Restricted Stock Units

63,026

$0.00

Footnote F1 (price): The Reporting Person received restricted stock units which vested upon the first anniversary of June 23, 2025, as reported in this Form 4, subject to the Reporting Person's continued employment or service with the Issuer through such date.

Jun 23, 2026

Catherine J. Motz - Director

Option exercise

Common stock, $0.001 par value per share

56,023

-^{footnote F1}

Jun 23, 2026

Catherine J. Motz - Director

Option exercise

Restricted Stock Units

56,023

$0.00

Jun 23, 2026

Catherine J. Motz - Director

Grant or award

Restricted Stock Units

6,950

$0.00

Footnote F1 (price): The Reporting Person received restricted stock units which vested upon the first anniversary of June 23, 2025, as reported in this Form 4, subject to the Reporting Person's continued employment or service with the Issuer through such date.

Jun 23, 2026

Amanda Fabiano - Director

Grant or award

Restricted Stock Units

6,950

$0.00

Jun 23, 2026

Amanda Fabiano - Director

Option exercise

Common stock, $0.001 par value per share

56,023

-^{footnote F1}

Jun 23, 2026

Amanda Fabiano - Director

Option exercise

Restricted Stock Units

56,023

$0.00

Footnote F1 (price): The Reporting Person received restricted stock units which vested upon the first anniversary of June 23, 2025, as reported in this Form 4, subject to the Reporting Person's continued employment or service with the Issuer through such date.

Jun 23, 2026

Walter E. Carter - Director

Grant or award

Restricted Stock Units

6,950

$0.00

Jun 23, 2026

Walter E. Carter - Director

Option exercise

Common stock, $0.001 par value per share

56,023

-^{footnote F1}

Jun 23, 2026

Walter E. Carter - Director

Option exercise

Restricted Stock Units

56,023

$0.00

Footnote F1 (price): The Reporting Person received restricted stock units which vested upon the first anniversary of June 23, 2025, as reported in this Form 4, subject to the Reporting Person's continued employment or service with the Issuer through such date.

Jun 23, 2026

Michael C. Bucella - Director

Option exercise

Restricted Stock Units

56,023

$0.00

Jun 23, 2026

Michael C. Bucella - Director

Grant or award

Restricted Stock Units

6,950

$0.00

Jun 23, 2026

Michael C. Bucella - Director

Option exercise

Common stock, $0.001 par value per share

56,023

-^{footnote F1}

Footnote F1 (price): The Reporting Person received restricted stock units which vested upon the first anniversary of June 23, 2025, as reported in this Form 4, subject to the Reporting Person's continued employment or service with the Issuer through such date.

May 26, 2026

Paul B. Prager - Officer

Open-market sale

Common stock, $0.001 par value per share

166,650

$24.43^{footnote F1}

$4.07M

May 27, 2026

Paul B. Prager - Officer

Open-market sale

Common stock, $0.001 par value per share

109,849

$25.58^{footnote F3}

$2.81M

May 27, 2026

Paul B. Prager - Officer

Open-market sale

Common stock, $0.001 par value per share

56,801

$26.57^{footnote F4}

$1.51M

Footnote F1 (price): The Price reported in Column 4 is a weighted average price. The shares of common stock, par value $0.001 per share ("Common Stock") were sold in multiple transactions at a price ranging from $24.2700 to $25.2699, inclusive. The reporting person undertakes to provide to the staff… Full note on SEC EDGAR
Footnote F3 (price): The Price reported in Column 4 is a weighted average price. The shares of Common Stock were sold in multiple transactions at a price ranging from $24.9500 to $25.9499, inclusive. The reporting person undertakes to provide to the staff of the Securities and Exchange Commission… Full note on SEC EDGAR
Footnote F4 (price): The Price reported in Column 4 is a weighted average price. The shares of Common Stock were sold in multiple transactions at a price ranging from $25.9500 to $26.9499, inclusive. The reporting person undertakes to provide to the staff of the Securities and Exchange Commission… Full note on SEC EDGAR

May 18, 2026

Paul B. Prager - Officer

Option exercise

Common stock, $0.001 par value per share

981,161

-^{footnote F1}

May 18, 2026

Paul B. Prager - Officer

Derivative

Common stock, $0.001 par value per share

542,582

-^{footnote F2}

May 18, 2026

Paul B. Prager - Officer

Option exercise

Performance-Based Restricted Stock Units

981,161

$0.00

Footnote F1 (price): The performance stock units vested in accordance with their terms upon the achievement of specified performance goals between the grant date and the third anniversary of January 2, 2026, subject to the Reporting Person's continued employment or service with the Issuer through… Full note on SEC EDGAR
Footnote F2 (price): The disposition is due to withholding to cover taxes, as a result of the Reporting Person's election of net settlement of performance stock units, which vested in accordance with their terms upon the achievement of specified performance goals between the grant date and the third… Full note on SEC EDGAR

May 18, 2026

Nazar M. Khan - Officer

Option exercise

Common stock, $0.001 par value per share

817,634

-^{footnote F1}

May 18, 2026

Nazar M. Khan - Officer

Derivative

Common stock, $0.001 par value per share

452,151

-^{footnote F2}

May 18, 2026

Nazar M. Khan - Officer

Option exercise

Performance-Based Restricted Stock Units

817,634

$0.00

Footnote F1 (price): The performance stock units vested in accordance with their terms upon the achievement of specified performance goals between the grant date and the third anniversary of January 2, 2026, subject to the Reporting Person's continued employment or service with the Issuer through… Full note on SEC EDGAR
Footnote F2 (price): The disposition is due to withholding to cover taxes, as a result of the Reporting Person's election of net settlement of performance stock units, which vested in accordance with their terms upon the achievement of specified performance goals between the grant date and the third… Full note on SEC EDGAR

May 18, 2026

Kerri M. Langlais - Officer

Option exercise

Performance-Based Restricted Stock Units

327,054

$0.00

May 18, 2026

Kerri M. Langlais - Officer

Option exercise

Common stock, $0.001 par value per share

327,054

-^{footnote F1}

May 18, 2026

Kerri M. Langlais - Officer

Derivative

Common stock, $0.001 par value per share

180,860

-^{footnote F2}

Footnote F1 (price): The performance stock units vested in accordance with their terms upon the achievement of specified performance goals between the grant date and the third anniversary of January 2, 2026, subject to the Reporting Person's continued employment or service with the Issuer through… Full note on SEC EDGAR
Footnote F2 (price): The disposition is due to withholding to cover taxes, as a result of the Reporting Person's election of net settlement of performance stock units, which vested in accordance with their terms upon the achievement of specified performance goals between the grant date and the third… Full note on SEC EDGAR

May 18, 2026

Patrick Fleury - Officer

Option exercise

Common stock, $0.001 par value per share

327,054

-^{footnote F1}

May 18, 2026

Patrick Fleury - Officer

Derivative

Common stock, $0.001 par value per share

128,695

-^{footnote F2}

May 18, 2026

Patrick Fleury - Officer

Option exercise

Performance-Based Restricted Stock Units

327,054

$0.00

Footnote F1 (price): The performance stock units vested in accordance with their terms upon the achievement of specified performance goals between the grant date and the third anniversary of January 2, 2026, subject to the Reporting Person's continued employment or service with the Issuer through… Full note on SEC EDGAR
Footnote F2 (price): The disposition is due to withholding to cover taxes, as a result of the Reporting Person's election of net settlement of performance stock units, which vested in accordance with their terms upon the achievement of specified performance goals between the grant date and the third… Full note on SEC EDGAR

Filed

Filer

Relationship

Market value

Notice

Sep 22, 2026

Prager Paul B.

Officer, Director

3,000,000

$52.35M

View on EDGAR

Sep 8, 2026

Motz Catherine J.

Director

56,023

$996K

View on EDGAR

Sep 1, 2026

Carter, Walter E.

Director

130,626

$1.98M

View on EDGAR