Company: FGMCU
Filing Date: 2025-01-28
Form Type: 8-A12B
Source: 0001104659-25-006572
Chunk: 0

Company: FG Merger II Corp.
Filing Date: 2025-01-28
Form: 8-A12B
Chunk 0
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<div align='center'>UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-A

FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES

PURSUANT TO SECTION 12(b) OR 12(g) OF

THE SECURITIES EXCHANGE ACT OF 1934

FG MERGER II CORP.

(Exact name of registrant as specified in its
charter)</div>

| Nevada                          |     | 86-2579471         |
| (State or other jurisdiction of 
 incorporation or organization)  |     | -I.R.S. Employer   
 Identification No. |

| 104 S. Walnut Street, Unit 1A            
 Itasca, IL                               |     |     60143 |
| (Address of principal executive offices) |     | -Zip Code |

<div align='center'>Securities to be registered pursuant to Section 12(b) of the Act:</div>

| Title of each class                                                                               
 to be so registered                                                                               |     | Name of each                   
 exchange on which              
 each class is to be registered |
| Units, each consisting of one shares of common                                                    
 stock, $0.0001 par value per share, and one right                                                 |     | The NASDAQ Stock Market LLC    |
| Common stock, $0.0001 par value per share                                                         |     | The NASDAQ Stock Market LLC    |
| Rights to receive one-tenth (1/10) of a share of common stock upon the consummation of an initial 
 business combination                                                                              |     | The NASDAQ Stock Market LLC    |

If this form relates to the registration of a
class of securities pursuant to Section 12(b) of the Exchange Act and is effective pursuant to General Instruction A.(c) or
(e), check the following box. x

If this form relates to the registration of a
class of securities pursuant to Section 12(g) of the Exchange Act and is effective pursuant to General Instruction A.(d) or
(e), check the following box. ¨

If this form relates to the registration of a
class of securities concurrently with a Regulation A offering, check the following box. ¨

<div align='center'>Securities Act registration statement file number to which this form relates:

333-275155

Securities to be registered pursuant to Section 12(g) of the Act:

None</div>

Item 1. Description of Registrant’s Securities to be