TeraWulf Inc.

Item 1.01 Entry into a Material Definitive Agreement. On April 14, 2026, TeraWulf Inc. (“TeraWulf” or the “Company”) entered into an underwriting agreement (the “Underwriting Agreement”) with Morgan Stanley & Co. LLC, as representative of the several underwriters named therein (the “Underwriters”), pursuant to which the Company agreed to sell 47,400,000 shares of the Company’s common stock, par value $0.001 per share (“Common Stock”), at a public offering price of $19.00 per share (the “Offering”). In connection with the Offering, the Company granted the Underwriters a 30-day option to purchase up to an additional 7,110,000 shares of Common Stock (the “Optional Shares”). The Offering, including the sale of the Optional Shares, closed on April 16, 2026. The net proceeds from the Offering, after deducting underwriting discounts and commissions and estimated offering expenses payable by us, were approximately $1,004.3 million. The Underwriting Agreement includes customary representations, warranties and covenants by the Company. It also provides that the Company will indemnify the Underwriters against certain liabilities, including liabilities under the Securities Act of 1933, as amended (the “Securities Act”). The sale of Common Stock was made pursuant to the Company’s registration statement on Form S-3ASR (File No. 333-295042) (the “Registration Statement”), as supplemented by a preliminary prospectus supplement, filed with the Securities and Exchange Commission (the “SEC”) on April 14, 2026, and a final prospectus supplement, dated April 14, 2026, filed with the SEC on April 16, 2026 pursuant to Rule 424(b) under the Securities Act. The foregoing description of the Underwriting Agreement is not complete and is qualified in its entirety by reference to the complete text of the Underwriting Agreement, a copy of which is attached as Exhibit 1.1 hereto and incorporated herein by reference.

Item 8.01 Other Events. On April 16, 2026, the Company issued a press release announcing the closing of the Offering. A copy of the press release is attached hereto as Exhibit 99.1 and incorporated herein by reference. In connection with the Offering, the legal opinion as to the legality of the Common Stock sold in the Offering is being filed as Exhibit 5.1 to this Current Report on Form 8-K and is incorporated herein and into the Registration Statement by reference.