Company: APACU
Filing Date: 2025-09-26
Form Type: 8-A12B
Source: 0001829126-25-007672
Chunk: 0

Company: StoneBridge Acquisition II Corp
Filing Date: 2025-09-26
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 (g) OF

THE SECURITIES EXCHANGE ACT OF 1934

StoneBridge Acquisition II Corporation

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

| Cayman                   
 Islands                  |     | Not                
 Applicable         |
| (State                   
 or other jurisdiction of 
 incorporation            
 or organization)         |     | -I.R.S.            
 Employer           
 Identification No. |

| One                             
 World Trade Center, Suite 8500  
 New York, New York              |     |     10007 |
| (Address of principal executive 
 offices)                        |     | -Zip Code |

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

| 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 Class A Ordinary Share, par value $0.0001 per share, and one Right to acquire one-tenth (1/10) of one Class A Ordinary Share |     | The Nasdaq Stock Market                                  
 LLC                                                      |
| Class A Ordinary Shares,                                                                                                         
 par value $0.0001 per share                                                                                                      |     | The Nasdaq Stock Market                                  
 LLC                                                      |
| Rights, each Right to acquire                                                                                                    
 one-tenth (1/10) of one Class A Ordinary Share                                                                                   |     | 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. ☒

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. ☐

Securities Act registration statement or Regulation A offering statement file number to which this form relates: 333-286983

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