Company: MCGAU
Filing Date: 2025-08-26
Form Type: 425
Source: 0001104659-25-083156
Chunk: 0

Company: Yorkville Acquisition Corp.
Filing Date: 2025-08-26
Form: 425
Chunk 0
---
<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

August 21, 2025

Date of Report (date of earliest event reported)

Yorkville Acquisition Corp.

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

| Cayman Islands                  | 001-42720   | N/A                   |
| (State or other jurisdiction of 
 incorporation or organization)  | -Commission 
 File Number | -I.R.S. Employer      
 Identification Number |

<div align='center'>1012 Springfield Avenue

Mountainside, New Jersey 07092

(Address of principal executive offices)

( 210) 985-8300

(Registrant’s telephone number, including area code)</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):

| x | Written communications 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                                                                      
 communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) |
| ¨ | Pre-commencement                                                                      
 communications 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 
 Symbols |     | Name of each exchange       
 on which registered         |
| Units, each consisting of one Class A ordinary share and one-third of one redeemable warrant                     |     | YORKU   |     | The Nasdaq Stock Market LLC |
| Class A ordinary shares, par value $0.0001 per share                                                             |     | YORK    |     | The Nasdaq Stock Market LLC |
| Warrants, each whole warrant exercisable for one Class A ordinary share at an exercise price of $11.50 per share |     | YORKW   |     | The