HC VII Sponsor LLC - 23 Sep 2026 Form 4 Insider Report for ONE Nuclear Energy Inc. (HVII)

Reporting relationship: Other*
Issuer ticker: HVII
Reported as of: 23 Sep 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 23 Sep 2026, 18:10:41 UTC
Prior SEC filing: 16 Jan 2025
Source filing: View source filing
Reporting owner signature: /s/ Daniel J. Hennessy, Managing Member of Hennessy Capital Group LLC, the Manager of HC VII Sponsor LLC

Key filing fact

HC VII Sponsor LLC filed Form 4 for ONE Nuclear Energy Inc. (HVII) on 23 Sep 2026.

Key facts

This page summarizes HC VII Sponsor LLC's Form 4 filing for ONE Nuclear Energy Inc. (HVII).
4 reported transactions and 4 derivative rows are listed below.
Accepted by SEC: 23 Sep 2026, 18:10.

Change

Previous filing in this sequence was filed on 16 Jan 2025.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (2)

CIK 0001851746 Primary reporting owner

HC VII Sponsor LLC

Relationship: Other*
Address: 195 US HWY 50, SUITE 207, ZEPHYR COVE
Signature: /s/ Daniel J. Hennessy, Managing Member of Hennessy Capital Group LLC, the Manager of HC VII Sponsor LLC
Signature date: 23 Sep 2026

CIK 0001597166

Hennessy Capital Group LLC

Relationship: Other*
Address: 195 US HWY 50, SUITE 207, ZEPHYR COVE
Signature: /s/ Daniel J. Hennessy, Managing Member of Hennessy Capital Group LLC
Signature date: 23 Sep 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

HVII transaction

Class A ordinary shares

Options Exercise

Transaction value
Shares: +5,203,333
Change %: +1041%
Price
Shares after: 5,703,333
Date: 23 Sep 2026
Ownership: See Explanation of Responses
Footnotes: F1, F2, F3, F4

HVII transaction

Class A ordinary shares

Options Exercise

Transaction value
Shares: +5,203,333
Change %: +1041%
Price
Shares after: 5,703,333
Date: 23 Sep 2026
Ownership: See Explanation of Responses
Footnotes: F1, F2, F3, F4

HVII transaction

Class A ordinary shares

Options Exercise

Transaction value
Shares: +41,666
Change %: +0.73%
Price
Shares after: 5,744,999
Date: 23 Sep 2026
Ownership: See Explanation of Responses
Footnotes: F1, F3, F4, F7

HVII transaction

Class A ordinary shares

Options Exercise

Transaction value
Shares: +41,666
Change %: +0.73%
Price
Shares after: 5,744,999
Date: 23 Sep 2026
Ownership: See Explanation of Responses
Footnotes: F1, F3, F4, F7

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

HVII transaction Derivative

Class B ordinary shares

Options Exercise

Transaction value
Shares: -5,203,333
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 23 Sep 2026
Ownership: See Explanation of Responses
Underlying class: Class A ordinary shares
Underlying amount: 5,203,333
Exercise price
Footnotes: F1, F2, F3, F4, F5

HVII transaction Derivative

Class B ordinary shares

Options Exercise

Transaction value
Shares: -5,203,333
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 23 Sep 2026
Ownership: See Explanation of Responses
Underlying class: Class A ordinary shares
Underlying amount: 5,203,333
Exercise price
Footnotes: F1, F2, F3, F4, F5

HVII transaction Derivative

Rights to receive Class A ordinary shares

Options Exercise

Transaction value
Shares: -500,000
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 23 Sep 2026
Ownership: See Explanation of Responses
Underlying class: Class A ordinary shares
Underlying amount: 41,666
Exercise price
Footnotes: F1, F3, F4, F6, F7

HVII transaction Derivative

Rights to receive Class A ordinary shares

Options Exercise

Transaction value
Shares: -500,000
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 23 Sep 2026
Ownership: See Explanation of Responses
Underlying class: Class A ordinary shares
Underlying amount: 41,666
Exercise price
Footnotes: F1, F3, F4, F6, F7

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Section 16 status

HC VII Sponsor LLC is no longer subject to Section 16 filing requirements. Form 4 or Form 5 obligations may still apply in specific circumstances.

Explanation of responses 7 footnotes

Footnote F1

Pursuant to the business combination agreement dated October 22, 2025 (the "Merger Agreement"), among other things, at the closing of the transactions contemplated thereby (the "Closing," and the date on which the Closing occurred, the "Closing Date") and following the Domestication (as defined below), Hennessy Capital Investment Corp. VII, a Cayman Islands exempted company with limited liability (the "Predecessor Issuer"), was renamed "ONE Nuclear Energy Inc." ("Successor Issuer") and consummated its initial business combination with ONE Nuclear Energy LLC, a Delaware limited liability company ("ONE Nuclear"), with ONE Nuclear being the surviving company. Following the Closing, ONE Nuclear became a direct wholly-owned subsidiary of the Successor Issuer.

Footnote F2

Pursuant to the Merger Agreement, on the Closing Date prior to the Closing, each then issued and outstanding Class B ordinary share, par value $0.0001 per share, of the Predecessor Issuer (each a "Class B Ordinary Share") converted (the "Sponsor Share Conversion") automatically, on a one-for-one basis, into one Class A ordinary share, par value $0.0001 per share, of the Predecessor Issuer (each a "Class A Ordinary Share").

Footnote F3

Pursuant to the Merger Agreement, immediately after the Sponsor Share Conversion, the Predecessor Issuer transferred by way of continuation and deregistration to and domesticated as a Delaware corporation (such continuation and domestication, the "Domestication"). In connection with, and after giving effect to, the Domestication, each then issued and outstanding Class A Ordinary Share converted automatically, on a one-for-one basis, into one share of common stock, par value $0.0001 per share, of the Successor Issuer (each, a "Successor Share"), and the Successor Issuer became the successor issuer to the Predecessor Issuer. The conversion of the Class A Ordinary Shares into Successor Shares did not alter the proportionate interests of the security holders, and accordingly the conversion is exempt from Section 16 of the Securities Exchange Act of 1934, as amended (the "Exchange Act").

Footnote F4

HC VII Sponsor LLC ("Sponsor") is the record holder of the securities reported herein. Hennessy Capital Group LLC is the sole manager of Sponsor. Daniel J. Hennessy, the Predecessor Issuer's Chairman and Chief Executive Officer, and Thomas D. Hennessy, the Predecessor Issuer's President, Chief Operating Officer and a director, are the sole managing members of Hennessy Capital Group LLC. Consequently, each of Mr. Daniel Hennessy and Mr. Thomas Hennessy may be deemed the beneficial owner of securities held by Sponsor and have shared voting and dispositive control over such securities. Each of Mr. Daniel Hennessy and Mr. Thomas Hennessy disclaims beneficial ownership over any securities owned by Sponsor in which he does not have any pecuniary interest.

Footnote F5

Amount has been adjusted to reflect the forfeiture of 375,000 Class B Ordinary Shares for no further consideration on January 21, 2025, upon the expiration of the underwriters' over-allotment option, which was partially exercised in connection with the Predecessor Issuer's initial public offering. Such forfeiture was exempt from Section 16 pursuant to Rule 16b-6(d) and Rule 16a-4(d) promulgated under the Exchange Act.

Footnote F6

Pursuant to the Merger Agreement, in connection with, and after giving effect to, the Domestication, each then issued and outstanding right (each, a "Predecessor Right") that were automatically convertible into one-twelfth (1/12) of one Class A Ordinary Share upon consummation of the Predecessor's initial business combination converted automatically into a right to acquire one-twelfth (1/12) of one Successor Share (each, a "Successor Right"). The conversion of Predecessor Rights into Successor Rights did not alter the proportionate interests of the rights holders, and accordingly the conversion is exempt from Section 16 of the Exchange Act.

Footnote F7

Pursuant to the Merger Agreement, each twelve Successor Rights were automatically surrendered in exchange for one Successor Share at the Closing.

SEC remarks

Each of the Reporting Persons was a 10% owner of the Predecessor Issuer. Each of Mr. Daniel Hennessy and Mr. Thomas Hennessy served as a director and an officer of the Predecessor Issuer and, as a result, each of the Reporting Persons may be deemed to have been a director of the Predecessor Issuer by deputization for purposes of Section 16. Each of Mr. Daniel Hennessy and Mr. Thomas Hennessy files Section 16 reports for each of the Predecessor Issuer and the Successor Issuer separately from the Reporting Persons.