Company: HVIIR
Filing Date: 2025-12-23
Form Type: S-4
Source: 0001493152-25-029121
Chunk: 2

Company: Hennessy Capital Investment Corp. VII
Filing Date: 2025-12-23
Form: S-4
Chunk 2
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 align='center'>ONENuclear Energy LLC
700 S. Rosemary Avenue, Suite 204
West Palm Beach, FL 33401
Telephone: (561) 779-9400</div>

| (2) | The                                         
 agent for service for the Co-Registrant is: |

<div align='center'>Richard Taylor

ONE Nuclear Energy LLC

Co-Founder, Chairman, Chief Executive Officer
700 S. Rosemary Avenue, Suite 204
West Palm Beach, FL 33401
Telephone: (561) 779-9400</div>

The information in this preliminary proxy statement/prospectus is not complete and may be changed. These securities described herein may not be sold until the registration statement filed with the U.S. Securities and Exchange Commission is declared effective. This preliminary proxy statement/prospectus is not an offer to sell these securities and it is not soliciting an offer to buy these securities in any jurisdiction where the offer or sale is not permitted.

<div align='center'>PRELIMINARY — SUBJECT TO COMPLETION DATED DECEMBER 23, 2025

proxy statement for extraordinary general meeting of hennessy capital investment corp. VII

(A Cayman Islands Exempted Company WITH LIMITED LIABILITY)

AND
PROSPECTUS FOR UP TO 137,410,526 SHARES OF COMMON STOCK, AND
19,690,000 RIGHTS TO PURCHASE SHARES OF COMMON STOCK
OF
HENNESSY cAPITAL INVESTMENT CORP. VII
(TO BE RENAMED “ONE Nuclear ENERGY INC.” EFFECTIVE IMMEDIATELY FOLLOWING
THE CONSUMMATION OF THE BUSINESS COMBINATION DESCRIBED HEREIN)

Hennessy Capital Investment Corp. VII

195 US Hwy 50, Suite 207

Zephyr Cove, Nevada 89448</div>

Dear Hennessy Capital Investment Corp. VII Shareholders:

Hennessy Capital Investment Corp. VII, a Cayman Islands exempted company with limited liability (“HVII”), cordially invites you to attend an extraordinary general meeting of shareholders (the “extraordinary general meeting”) to consider matters related to the proposed Business Combination (as defined and described below). The extraordinary general meeting will be held on [ ], 2026, at [ ] [a.m. / p.m.], Eastern time, or at such other time and such other date to which the extraordinary general meeting may be adjourned or postponed, via a virtual meeting. To register and receive access to