Completion of Acquisition or Disposition of Assets. On the Closing Date, the conditions to the effectiveness of the assignment under the Assignment Agreement were satisfied, and the Purchaser completed the Transaction. The information set forth under

. 104 Cover Page Interactive Data File (embedded within the Inline XBRL document). Cautionary Note Regarding Forward-Looking Statements This Current Report on Form 8-K contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, Section 21E of the Securities Exchange Act of 1934, as amended, and the Private Securities Litigation Reform Act of 1995. Forward-looking statements include all statements that are not historical facts, including sta…

Entry into a Material Definitive Agreement. On August 31, 2026 (the “Closing Date”), Net Power, LLC, a Delaware limited liability company (the “Purchaser”) and an indirect subsidiary of NET Power Inc. (the “Company”), and EMPower USA, LLC, a Texas limited liability company (“EMPower”), entered into, and simultaneously closed the transaction contemplated by, an Assignment and Assumption Agreement (the “Assignment Agreement”). Assignment Agreement Under the Assignment Agreement, the Purchaser a…

of this Current Report on Form 8-K and the related information in Exhibit 99.1 attached hereto is being furnished herewith, and shall not be deemed "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section and shall not be incorporated by reference in any filing with, the Securities and Exchange Commission under the Securities Act of 1933, as amended, or the Exchange Act, except as shall…

of this Current Report on Form 8-K and the related information in Exhibit 99.1 attached hereto is being furnished herewith, and shall not be deemed "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section and shall not be incorporated by reference in any filing with, the Securities and Exchange Commission under the Securities Act of 1933, as amended, or the Exchange Act, except as shall…

Chief Financial Officer — Ned Leland (Lee) Shuman: The company appointed a new Chief Financial Officer with extensive experience in the power sector.

of this Current Report on Form 8-K and the related information in Exhibit 99.1 attached hereto is being furnished herewith, and shall not be deemed "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section and shall not be incorporated by reference in any filing with, the Securities and Exchange Commission under the Securities Act of 1933, as amended, or the Exchange Act, except as shall…

of this Current Report on Form 8-K and the related information in Exhibit 99.1 attached hereto is being furnished herewith, and shall not be deemed "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section and shall not be incorporated by reference in any filing with, the Securities and Exchange Commission under the Securities Act of 1933, as amended, or the Exchange Act, except as shall…

of this Current Report on Form 8-K and the related information in Exhibit 99.1 attached hereto is being furnished herewith, and shall not be deemed "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section and shall not be incorporated by reference in any filing with, the Securities and Exchange Commission under the Securities Act of 1933, as amended, or the Exchange Act, except as shall…

Director — Eunkyung Sung: Eunkyung Sung resigned as a member of the Board.

Chief Accounting Officer — Kelly Rosser: Kelly Rosser is leaving her role as Chief Accounting Officer with a severance package.

of this Current Report on Form 8-K and the related information in Exhibit 99.1 attached hereto is being furnished herewith, and shall not be deemed "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section and shall not be incorporated by reference in any filing with, the Securities and Exchange Commission under the Securities Act of 1933, as amended, or the Exchange Act, except as shall…

Changes in Registrant’s Certifying Accountant. (a) Dismissal of independent registered public accounting firm. On March 17, 2025 , the audit committee (the “Audit Committee”) of the board of directors of NET Power Inc. (the “Company”) dismissed Grant Thornton LLP (“Grant Thornton”) as the Company’s independent registered public accounting firm. The report of Grant Thornton on the consolidated balance sheets of the Company as of December 31, 2024 and 2023, the related consolidated statements o…

of this Current Report on Form 8-K and the related information in Exhibit 99.1 attached hereto is being furnished herewith, and shall not be deemed "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section and shall not be incorporated by reference in any filing with, the Securities and Exchange Commission under the Securities Act of 1933, as amended, or the Exchange Act, except as shall…

of this Current Report on Form 8-K and the related information in Exhibit 99.1 attached hereto is being furnished herewith, and shall not be deemed "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section and shall not be incorporated by reference in any filing with, the Securities and Exchange Commission under the Securities Act of 1933, as amended, or the Exchange Act, except as shall…

Entry into a Material Definitive Agreement. On September 30, 2024, Net Power, LLC, a subsidiary of Net Power Inc. (the “Company”), and Baker Hughes Energy Services LLC (“Baker Hughes”) entered into Variation Agreement No. 2 Regarding Letter of Limited Notice to Proceed for the Purchase of KPEP Long Lead Time Items (the “LNTP”). Pursuant to the LNTP, the Company will pay Baker Hughes up to approximately $90 million for the purchase of long-lead materials necessary for the procurement and manuf…

of this Current Report on Form 8-K and the related information in Exhibit 99.1 attached hereto is being furnished herewith, and shall not be deemed "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section and shall not be incorporated by reference in any filing with, the Securities and Exchange Commission under the Securities Act of 1933, as amended, or the Exchange Act, except as shall…

of this Current Report on Form 8-K and the related information in Exhibit 99.1 attached hereto is being furnished herewith, and shall not be deemed "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section and shall not be incorporated by reference in any filing with, the Securities and Exchange Commission under the Securities Act of 1933, as amended, or the Exchange Act, except as shall…

of this Current Report on Form 8-K and the related information in Exhibit 99.1 attached hereto is being furnished herewith, and shall not be deemed "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section and shall not be incorporated by reference in any filing with, the Securities and Exchange Commission under the Securities Act of 1933, as amended, or the Exchange Act, except as shall…

of this Current Report on Form 8-K and the related information in Exhibit 99.1 attached hereto is being furnished herewith, and shall not be deemed "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section and shall not be incorporated by reference in any filing with, the Securities and Exchange Commission under the Securities Act of 1933, as amended, or the Exchange Act, except as shall…

The filing describes a new severance plan for eligible executives and management employees.

of this Current Report on Form 8-K and the related information in Exhibit 99.1 attached hereto is being furnished herewith, and shall not be deemed "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section and shall not be incorporated by reference in any filing with, the Securities and Exchange Commission under the Securities Act of 1933, as amended, or the Exchange Act, except as shall…

Changes in Registrant’s Certifying Accountant. (a) Dismissal of independent registered public accounting firm. On June 29, 2023, the audit committee (the “Audit Committee”) of the board of directors of NET Power Inc. (the “Company”) dismissed WithumSmith+Brown, PC (“Withum”) as the Company’s independent registered public accounting firm. The report of Withum on the financial statements of the Company (f/k/a Rice Acquisition Corp. II) as of and for the year ended December 31, 2022 and 2021, fo…

The filing describes a business combination and shareholder approval of an incentive plan, not a management change.

Other Events. As described in the Proxy Statement/Prospectus, RONI provided its public shareholders (as defined therein) with the opportunity to have all or a portion of their Class A Shares redeemed for cash upon the closing of the Business Combination. Holders of 21,195,224 Class A Shares, or approximately 61% of the Class A Shares, have exercised their redemption rights. As a result, the Business Combination is expected to raise more than $675 million in gross proceeds through a combinatio…