Hennessy Capital Investment Corp. VII and ONE Nuclear Energy LLC Announce Filing of Amended Registration Statement on Form S-4 and Updated Investor Presentation

Hennessy Capital Investment Corp. VII (NASDAQ: HVII) ("Hennessy VII"), and ONE Nuclear Energy LLC ("ONE Nuclear"), an independent developer of large-scale energy solutions powered by natural gas and advanced nuclear technologies, today announced the filing with the U.S. Securities and Exchange Commission (“SEC”) on April 3, 2026 of an amended registration statement on Form S-4 (the “Registration Statement”) in connection with their proposed business combination. The Registration Statement includes a preliminary proxy statement/prospectus and has not yet been declared effective. The filing of the amended Registration Statement represents a step toward completing the previously announced proposed business combination between Hennessy VII and ONE Nuclear. The amended Registration Statement includes updated information regarding the proposed transaction and incorporates recent developments.

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Concurrently with the filing of the amended Registration Statement, Hennessy VII filed an updated investor presentation, providing enhanced details about ONE Nuclear's priority development sites and illustrative development timeline and unit economics.

Hennessy VII entered into a business combination agreement with ONE Nuclear on October 23, 2025, pursuant to which, following consummation of the transaction, the combined company is expected to be listed on Nasdaq under the ticker symbol "ONEN." Completion of the transaction is subject to approval by Hennessy VII's shareholders, the Registration Statement being declared effective by the SEC, and other customary closing conditions.

ONE Nuclear is an independent developer of large-scale energy parks powered by natural gas and advanced nuclear small modular reactor (SMR) technologies. ONE Nuclear's platform is designed to deliver reliable, baseload power at scale to energy-intensive customers, including data centers, industrial users, and grid infrastructure.

The proposed transaction is expected to provide up to approximately $210 million in gross proceeds, from a combination of anticipated PIPE proceeds and up to $195 million of cash held in Hennessy VII's trust account, before accounting for potential redemptions and transaction expenses. Proceeds are expected to be used to support ONE Nuclear's development activities and to fund transaction-related costs.