Hennessy VII Files S-4 For ONE Nuclear Merger, Expecting To be Listed On Nasdaq Under The Ticker Symbol 'ONEN'

• Proposed Nasdaq listing under ticker symbol ONEN in connection with business combination with ONE Nuclear Energy.
• The transaction is expected to be completed in the first half of 2026, subject to customary closing conditions.

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 that Hennessy VII filed a registration statement on Form S-4 with the U.S. Securities and Exchange Commission ("SEC") on December 23, 2025, in connection with their previously announced proposed business combination.

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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.

"ONE Nuclear is building an energy platform centered on durability, scale, and long-term ownership," said Daniel Hennessy, Chairman of Hennessy VII. "The S-4 filing reflects continued progress toward completing a transaction that we believe aligns well with public-market investors seeking exposure to critical energy infrastructure."

"The filing of the S-4 marks a meaningful milestone as we progress toward becoming a public company," said Richard Taylor, Chairman and Chief Executive Officer of ONE Nuclear. "We believe the public markets provide an appropriate platform for a long-duration infrastructure business focused on disciplined development, execution, and long-term ownership."

Additional information about the proposed business combination is included in the registration statement on Form S-4 filed by Hennessy VII with the SEC.