Company: FGMCU
Filing Date: 2025-12-30
Form Type: S-4/A
Source: 0001104659-25-124947
Chunk: 0

Company: FG Merger II Corp.
Filing Date: 2025-12-30
Form: S-4/A
Chunk 0
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As filed with the U.S. Securities and Exchange Commission on December 29, 2025 Registration No. 333-290357 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Amendment No. 1 to FORM S-4 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 FG MERGER II CORP. (Exact Name of Registrant as Specified in Its Charter)

| Nevada                          |                         6770 | 86-2579471             |
| (State or other jurisdiction of | (Primary Standard Industrial | (I.R.S. Employer       |
| incorporation or organization)  |  Classification Code Number) | Identification Number) |

For co-registrants, see “Table of Co-Registrants” on the following page 104 S. Walnut Street, Unit 1A Itasca, Illinois 60143 847-791-6817 (Address, including zip code, and telephone number, including area code, of Registrant’s principal executive offices) Larry G. Swets, Jr. Chief Executive Officer c/o FG Merger II Corp. 104 S. Walnut Street, Unit 1A Itasca, Illinois 60143 847-791-6817 (Name, address, including zip code, and telephone number, including area code, of agent for service) Copies to:

| Mitchell S. Nussbaum      | Michael J. Blankenship         |
| Giovanni Caruso           | Winston & Strawn LLP           |
| Loeb & Loeb LLP           | 800 Capitol Street, Suite 2400 |
| 345 Park Avenue           | Houston, TX 77002              |
| New York, NY 10154        | Tel: 713-651-2678              |
| Telephone: (212) 407-4000 | ​                              |

Approximate date of commencement of proposed sale of the securities to the public: As soon as practicable after this registration statement is declared effective and all other conditions to the Business Combination described in the enclosed joint proxy statement/prospectus have been satisfied or waived. If the securities being registered on this Form are being offered in connection with the formation of a holding company and there is compliance with General Instruction G, check the following box: ☐ If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same