# EDGAR Filing Document

**Accession Number:** 0001877255
**File Stem:** 0000950142-25-002221
**Filing Date:** 2025-8
**Character Count:** 32025
**Document Hash:** 7674e394c7cbfcd8134c87b4a650f7ff
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000950142-25-002221.hdr.sgml**: 20250818

**ACCESSION NUMBER**: 0000950142-25-002221

**CONFORMED SUBMISSION TYPE**: SCHEDULE 13D/A

**PUBLIC DOCUMENT COUNT**: 3

**FILED AS OF DATE**: 20250818

**DATE AS OF CHANGE**: 20250818

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** TERAWULF INC.
- **CENTRAL INDEX KEY:** 0001083301
- **STANDARD INDUSTRIAL CLASSIFICATION:** FINANCE SERVICES [6199]
- **ORGANIZATION NAME:** 09 Crypto Assets
- **EIN:** 871909475
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-58319
- **FILM NUMBER:** 251229528

**BUSINESS ADDRESS:**
- **STREET 1:** 9 FEDERAL STREET
- **CITY:** EASTON
- **STATE:** MD
- **ZIP:** 21601
- **BUSINESS PHONE:** (410) 770-9500

**MAIL ADDRESS:**
- **STREET 1:** 9 FEDERAL STREET
- **CITY:** EASTON
- **STATE:** MD
- **ZIP:** 21601

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** IKONICS CORP
- **DATE OF NAME CHANGE:** 20021216

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** CHROMALINE CORP
- **DATE OF NAME CHANGE:** 19990405
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Prager Paul B.
- **CENTRAL INDEX KEY:** 0001877255

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D/A

**MAIL ADDRESS:**
- **STREET 1:** 9 FEDERAL STREET
- **CITY:** EASTON
- **STATE:** MD
- **ZIP:** 21601

## Ex-99

**SCHEDULE 5(c)**

The following transactions were conducted by the Reporting Persons in the last 60 days:

&nbsp;&nbsp;&nbsp;&nbsp;· On August 1, 2025, Mr. Paul B. Prager received a grant of 2,500,000 restricted stock units, each representing
a contingent right to receive a share of Common Stock.

&nbsp;&nbsp;&nbsp;&nbsp;· On July 7, 2025, Beowulf E&D Holdings received 1,795,580 shares of Common Sock as earnout consideration
pursuant to that certain Membership Interest Purchase Agreement, dated as of May 21, 2025, among E&D Holdings, TeraCub Inc. and the
issuer.

&nbsp;&nbsp;&nbsp;&nbsp;· On June 18, 2025, Beowulf E&D Holdings contributed 1,000,000 shares to Somerset Goods & Services
Trust for no consideration.

## Exhibit 99.1

**EXHIBIT 1**

**JOINT FILING AGREEMENT**

In accordance with Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended, the persons named below agree to the joint filing on behalf of each of them of a statement on Schedule 13D, and amendments thereto, relating to the common stock, $0.001 par value per share, of TeraWulf Inc. This Joint Filing Agreement shall be included as an exhibit to such joint filing and may be executed in any number of counterparts, all of which together shall constitute one and the same instrument.

In evidence thereof, each of the undersigned, being duly authorized, hereby executes this Joint Filing Agreement.

Date: August 18, 2025

---

| | | |
|:---|:---|:---|
| **STAMMTISCH INVESTMENTS LLC** | **STAMMTISCH INVESTMENTS LLC** | **STAMMTISCH INVESTMENTS LLC** |
| By: | /s/ Paul B. Prager | /s/ Paul B. Prager |
|  | Name: | Paul B. Prager |
|  | Title: | President and Manager |
| **PAUL B. PRAGER** | **PAUL B. PRAGER** | **PAUL B. PRAGER** |
| /s/ Paul B. Prager | /s/ Paul B. Prager | /s/ Paul B. Prager |
| **LUCKY LIEFERN, LLC** | **LUCKY LIEFERN, LLC** | **LUCKY LIEFERN, LLC** |
| By: | /s/ Paul B. Prager | /s/ Paul B. Prager |
|  | Name: | Paul B. Prager |
|  | Title: | Managing Member |
| **HEOROT POWER HOLDINGS, LLC** | **HEOROT POWER HOLDINGS, LLC** | **HEOROT POWER HOLDINGS, LLC** |
| By: | /s/ Paul B. Prager | /s/ Paul B. Prager |
|  | Name: | Paul B. Prager |
|  | Title: | Managing Member |
| **ALLIN WULF LLC** | **ALLIN WULF LLC** | **ALLIN WULF LLC** |
| By: | /s/ Paul B. Prager | /s/ Paul B. Prager |
|  | Name: | Paul B. Prager |
|  | Title: | President |
| **BEOWULF ELECTRICITY & DATA INC.** | **BEOWULF ELECTRICITY & DATA INC.** | **BEOWULF ELECTRICITY & DATA INC.** |
| By: | /s/ Paul B. Prager | /s/ Paul B. Prager |
|  | Name: | Paul B. Prager |
|  | Title: | President |
| **RIESLING POWER LLC** | **RIESLING POWER LLC** | **RIESLING POWER LLC** |
| By: | /s/ Paul B. Prager | /s/ Paul B. Prager |
|  | Name: | Paul B. Prager |
|  | Title: | President |
| **PAUL B. PRAGER 2020 REVOCABLE TRUST** | **PAUL B. PRAGER 2020 REVOCABLE TRUST** | **PAUL B. PRAGER 2020 REVOCABLE TRUST** |
| By: | /s/ Paul B. Prager | /s/ Paul B. Prager |
|  | Name: | Paul B. Prager |
|  | Title: | Trustee |
| **BEOWULF E&D HOLDINGS INC.** | **BEOWULF E&D HOLDINGS INC.** | **BEOWULF E&D HOLDINGS INC.** |
| By: | /s/ Paul B. Prager | /s/ Paul B. Prager |
|  | Name: | Paul B. Prager |
|  | Title: | President |

---

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

## SCHEDULE 13D

### Under the Securities Exchange Act of 1934

**(Amendment No. 15)**

**TERAWULF INC.**

*(Name of Issuer)*

**Common stock, par value $0.001 per share**

*(Title of Class of Securities)*

**88080T104**

*(CUSIP Number)*

**c/o Stammtisch Investments LLC**<br>9 Federal Street<br>Easton MD 21601<br>410-770-9500

*(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)*

**08/12/2025**

*(Date of Event Which Requires Filing of this Statement)*

| **CUSIP No.** | **88080T104** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Stammtisch Investments LLC** | Name of reporting person<br>**Stammtisch Investments LLC** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**DELAWARE** | Citizenship or place of organization<br>**DELAWARE** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**0.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**0.00** | Aggregate amount beneficially owned by each reporting person<br>**0.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**0%** | Percent of class represented by amount in Row (11)<br>**0%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**OO** | Type of Reporting Person (See Instructions)<br>**OO** | |

---

| **CUSIP No.** | **88080T104** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Paul B. Prager** | Name of reporting person<br>**Paul B. Prager** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**X1** | Citizenship or place of organization<br>**X1** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**43364058.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**43364058.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**0.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**43364058.00** | Aggregate amount beneficially owned by each reporting person<br>**43364058.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**10.7%** | Percent of class represented by amount in Row (11)<br>**10.7%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IN** | Type of Reporting Person (See Instructions)<br>**IN** | |

---

| **CUSIP No.** | **88080T104** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Lucky Liefern LLC** | Name of reporting person<br>**Lucky Liefern LLC** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**DELAWARE** | Citizenship or place of organization<br>**DELAWARE** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**0.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**0.00** | Aggregate amount beneficially owned by each reporting person<br>**0.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**0%** | Percent of class represented by amount in Row (11)<br>**0%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**OO** | Type of Reporting Person (See Instructions)<br>**OO** | |

---

| **CUSIP No.** | **88080T104** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Heorot Power Holdings LLC** | Name of reporting person<br>**Heorot Power Holdings LLC** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**DELAWARE** | Citizenship or place of organization<br>**DELAWARE** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**5000.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**5000.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**0.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**5000.00** | Aggregate amount beneficially owned by each reporting person<br>**5000.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**0%** | Percent of class represented by amount in Row (11)<br>**0%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**OO** | Type of Reporting Person (See Instructions)<br>**OO** | |

---

| **CUSIP No.** | **88080T104** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Allin WULF LLC** | Name of reporting person<br>**Allin WULF LLC** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**DELAWARE** | Citizenship or place of organization<br>**DELAWARE** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**1971778.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**1971778.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**0.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**1971778.00** | Aggregate amount beneficially owned by each reporting person<br>**1971778.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**0.5%** | Percent of class represented by amount in Row (11)<br>**0.5%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**OO** | Type of Reporting Person (See Instructions)<br>**OO** | |

---

| **CUSIP No.** | **88080T104** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Beowulf Electricity & Data Inc.** | Name of reporting person<br>**Beowulf Electricity & Data Inc.** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**DELAWARE** | Citizenship or place of organization<br>**DELAWARE** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**0.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**0.00** | Aggregate amount beneficially owned by each reporting person<br>**0.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**0%** | Percent of class represented by amount in Row (11)<br>**0%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**OO** | Type of Reporting Person (See Instructions)<br>**OO** | |

---

| **CUSIP No.** | **88080T104** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Riesling Power LLC** | Name of reporting person<br>**Riesling Power LLC** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**DELAWARE** | Citizenship or place of organization<br>**DELAWARE** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**36100000.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**36100000.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**0.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**36100000.00** | Aggregate amount beneficially owned by each reporting person<br>**36100000.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**9.2%** | Percent of class represented by amount in Row (11)<br>**9.2%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**OO** | Type of Reporting Person (See Instructions)<br>**OO** | |

---

| **CUSIP No.** | **88080T104** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Paul B. Prager 2020 Revocable Trust** | Name of reporting person<br>**Paul B. Prager 2020 Revocable Trust** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**NEW YORK** | Citizenship or place of organization<br>**NEW YORK** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**40895580.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**40895580.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**0.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**40895580.00** | Aggregate amount beneficially owned by each reporting person<br>**40895580.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**10.4%** | Percent of class represented by amount in Row (11)<br>**10.4%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**OO** | Type of Reporting Person (See Instructions)<br>**OO** | |

---

| **CUSIP No.** | **88080T104** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Beowulf E&D Holdings Inc.** | Name of reporting person<br>**Beowulf E&D Holdings Inc.** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**DELAWARE** | Citizenship or place of organization<br>**DELAWARE** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**4795580.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**4795580.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**0.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**4795580.00** | Aggregate amount beneficially owned by each reporting person<br>**4795580.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**1.2%** | Percent of class represented by amount in Row (11)<br>**1.2%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**CO** | Type of Reporting Person (See Instructions)<br>**CO** | |

---

**Item 1. Security and Issuer**

**(a) Title of Class of Securities:**
Common stock, par value $0.001 per share

**(b) Name of Issuer:**
TERAWULF INC.

**(c) Address of Issuer's Principal Executive Offices:**
9 Federal Street, Easton, MD, 21601

This Amendment No. 15 ("Amendment No. 15") amends and supplements the original Schedule 13D filed with the Securities and Exchange Commission (the "Commission") on December 23, 2021, as amended by Amendment No. 1 thereto, filed with the Commission on March 15, 2022, Amendment No. 2 thereto, filed with the Commission on September 2, 2022, Amendment No. 3 thereto, filed with the Commission on October 4, 2022, Amendment No. 4 thereto, filed with the Commission on October 14, 2022, Amendment No. 5 thereto, filed with the Commission on December 16, 2022, Amendment No. 6 thereto, filed with the Commission on February 3, 2023, Amendment No. 7 thereto, filed with the Commission on March 10, 2023, Amendment No. 8 thereto, filed with the Commission on June 28, 2023, Amendment No. 9 thereto, filed with the Commission on August 1, 2023 Amendment No. 10 thereto, filed with the Commission on August 30, 2023, Amendment No. 11 thereto, filed with the Commission on September 22, 2023, Amendment No. 12 thereto filed with the Commission on October 24, 2023, Amendment No. 13 thereto filed with the Commission on October 10, 2024 and Amendment No. 14 thereto filed with the Commission on December 31, 2024 (the "Schedule 13D") and is filed by (i) Stammtisch Investments LLC, a Delaware limited liability company ("Stammtisch"), (ii) Mr. Paul B. Prager, (iii) Lucky Liefern LLC ("Lucky Liefern"), (iv) Heorot Power Holdings LLC ("Heorot"), (v) Allin WULF LLC ("Allin WULF"), (vi) Beowulf Electricity & Data Inc. ("Beowulf E&D"), (vii) Riesling Power LLC ("Riesling"), (viii) the Paul B. Prager 2020 Revocable Trust (the "Prager Revocable Trust") and (ix) Beowulf E&D Holdings Inc. ("Beowulf E&D Holdings") (each, a "Reporting Person" and, collectively, the "Reporting Persons"), relating to the shares of the common stock, par value $0.001 per share (the "Common Stock"), of TeraWulf Inc. (formerly known as Telluride Holdco, Inc.), a Delaware corporation (the "Issuer"). Capitalized terms used but not defined herein shall have the meaning set forth in the Schedule 13D. The purpose of this Amendment No. 15 is to remove Stammtisch, Lucky Liefern and Beowulf E&D, as Reporting Persons as they no longer beneficially own any shares of the Issuer's Common Stock, to add Beowulf E&D Holdings as a Reporting Person and to disclose recent transactions identified in Item 3 and Item 6.

**Item 4. Purpose of Transaction**

No material change.

**Item 5. Interest in Securities of the Issuer**

**(a)**
Item 5 is amended as follows:

Reference to percentage ownerships of Common Stock in this Schedule 13D are based on 391,926,373 shares of Common Stock of the Issuer, issued and outstanding as of August 6, 2025, as set forth in the Issuer's Quarterly Report on Form 10-Q, filed with the SEC on August 8, 2025. (a) and (b) (i) As of the date of this Schedule 13D, Stammtisch no longer beneficially owns any shares of Common Stock. (ii) As of the date of this Schedule 13D, Mr. Paul B. Prager may be deemed to be the beneficial owner of 43,364,058 shares of Common Stock (approximately 10.7% of Common Stock). Of such 43,364,058 shares of Common Stock, Mr. Paul B. Prager has a beneficial ownership interest with respect to 491,700 shares he owns directly, 5,000 shares of Common Stock by virtue of his position as the sole managing member of Heorot, 1,971,778 shares underlying warrants held by Allin Wulf, 40,895,580 shares of Common Stock by virtue of his position as the sole trustee of the Prager Revocable Trust, which is the sole member of Riesling (which holds 36,000,000 shares of Common Stock) and the sole stockholder of Beowulf E&D Holdings (which holds 4,795,580 shares of Common Stock). Mr. Paul B. Prager may be deemed to have sole voting power and sole dispositive power with respect to all such 43,354,059 shares of Common. Mr. Paul B. Prager disclaims beneficial ownership of all such shares of Common Stock. (iii) As of the date of this Schedule 13D, Lucky Liefern no longer beneficially owns any shares of Common Stock (. (iv) As of the date of this Schedule 13D, Heorot may be deemed the beneficial owner of 5,000 shares of Common Stock (approximately 0.0% of Common Stock), which it holds directly. Heorot may be deemed to have sole voting and dispositive power with respect to such shares of Common Stock. (v) As of the date of this Schedule 13D, Allin WULF may be deemed the beneficial owner of 1,971,778 shares of Common Stock (approximately 0.5% of Common Stock) underlying warrants it holds directly. Allin Wulf may be deemed to have sole voting and dispositive power with respect to such shares of Common Stock. (vi) As of the date of this Schedule 13D, Beowulf E&D no longer beneficially owns any shares of Common Stock.   (vii) As of the date of this Schedule 13D, Riesling may be deemed the beneficial owner of 36,100,000 shares of Common Stock (approximately 9.2% of Common Stock), which it holds directly. Riesling may be deemed to have sole voting and dispositive power with respect to such shares of Common Stock. (viii) As of the date of this Schedule 13D, Beowulf E&D Holdings amy be deemed the beneficial owner of 4,795,580 shares of Common Stock (approximately 1.2% of Common Stock), which it holds directly.  Beowulf E&D Holdings may be deemed to have sole voting and dispositive power with respect to such shares of Common Stock. (ix) As of the date of this Schedule 13D, the Prager Revocable Trust may be deemed the beneficial owner of 40,895,580 shares of Common Stock (approximately 10.4% of Common Stock), by virtue of its position as the sole managing member of Riesling and the sole stockholder of Beowulf E&D Holdings. The Prager Revocable Trust may be deemed to have sole voting and dispositive power with respect to such shares of Common Stock.

**(b)**
See Item 5(a).

**(c)**
The information set forth in Item 3 above is hereby incorporated into this Item 5(c) by reference, as applicable.  See also Schedule 5(c).

**Item 6. Contracts, Arrangements, Understandings or Relationships With Respect to Securities of the Issuer.**

The information set forth under Item 3 above is incorporated herein by reference.

As of the date of this Amendment No. 15, a total of 2,064,518 shares of Common Stock are held in one or more brokerage accounts subject to customary collateral arrangements.

### 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.

**Reporting Person:** Stammtisch Investments LLC

**Signature:** /s/ Paul B. Prager

**Name/Title:** President and Manager

**Date:** 08/18/2025

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.

**Reporting Person:** Paul B. Prager

**Signature:** /s/ Paul B. Prager

**Name/Title:** Paul B. Prager

**Date:** 08/18/2025

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.

**Reporting Person:** Lucky Liefern LLC

**Signature:** /s/ Paul B. Prager

**Name/Title:** Managing Member

**Date:** 08/18/2025

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.

**Reporting Person:** Heorot Power Holdings LLC

**Signature:** /s/ Paul B. Prager

**Name/Title:** Managing Member

**Date:** 08/18/2025

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.

**Reporting Person:** Allin WULF LLC

**Signature:** /s/ Paul B. Prager

**Name/Title:** President

**Date:** 08/18/2025

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.

**Reporting Person:** Beowulf Electricity & Data Inc.

**Signature:** /s/ Paul B. Prager

**Name/Title:** President

**Date:** 08/18/2025

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.

**Reporting Person:** Riesling Power LLC

**Signature:** /s/ Paul B. Prager

**Name/Title:** President

**Date:** 08/18/2025

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.

**Reporting Person:** Paul B. Prager 2020 Revocable Trust

**Signature:** /s/ Paul B. Prager

**Name/Title:** Trustee

**Date:** 08/18/2025

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.

**Reporting Person:** Beowulf E&D Holdings Inc.

**Signature:** /s/ Paul B. Prager

**Name/Title:** President

**Date:** 08/18/2025