Company: FSHPU
Filing Date: 2025-04-22
Form Type: 425
Source: 0001829126-25-002834
Chunk: 0

Company: Flag Ship Acquisition Corp
Filing Date: 2025-04-22
Form: 425
Chunk 0
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<div align='center'>UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 8-K

Current Report

Pursuant to Section 13 or 15(d) of the

Securities Exchange Act of 1934

April 18, 2025

Date of Report (Date of earliest event reported)

FLAG SHIP ACQUISITION CORPORATION

(Exact Name of Registrant as Specified in Charter)</div>

| Cayman Islands               |     | 001-42138   |     | 00-0000000         
 N/A                |
| (State or Other Jurisdiction 
 of Incorporation)            |     | -Commission 
 File Number |     | -I.R.S. Employer   
 Identification No. |

<div align='center'>26 Broadway, Suite 934

New York, New York 10004

(Address of Principal Executive Offices, and Zip Code)

(646)-362-0256

Registrant’s Telephone Number, Including Area Code

Not Applicable

(Former Name or Former Address, if Changed Since Last Report)</div>

Check the appropriate box below if the Form 8-K filing
is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction
A.2. below):

| ☒ | Written communication pursuant to Rule 425                 
 under the Securities Act (17 CFR 230.425)                  |
| ☐ | Soliciting material pursuant to Rule 14a-12                
 under the Exchange Act (17 CFR 240.14a-12)                 |
| ☐ | Pre-commencement communication pursuant to                 
 Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) |
| ☐ | Pre-commencement communication pursuant to                 
 Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) |

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

| Title                                                  
 of each class                                          |     | Trading   
 Symbol(s) |     | Name                                 
 of each exchange on which registered |
| Units, each consisting                                 
 of one Ordinary Share, $0.001 par value, and one right |     | FSHPU     |     | The Nasdaq Stock Market LLC          |
| Ordinary Shares,                                       
 $0.001 par value                                       |     | FSHP      |     | The