Company: OSRH
Filing Date: 2025-02-13
Form Type: 425
Source: 0001213900-25-013502
Chunk: 0

Company: OSR Holdings, Inc.
Filing Date: 2025-02-13
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

Date of Report (Date of earliest event reported): February 13, 2025</div>

| OSR HOLDINGS, INC |

<div align='center'>(Exact Name of Registrant as Specified in Charter)</div>

| Delaware                     |     | 001-41390               |     | 84-5052822          |
| (State or Other Jurisdiction |     | -Commission File Number |     | (IRS Employer       |
| of Incorporation)            |     |                         |     | Identification No.) |

| 10900                                    
 NE 4th Street, Suite 2300, Bellevue, WA  |     |     98004 |
| (Address of Principal Executive Offices) |     | -Zip Code |

<div align='center'>Registrant’s telephone number, including area code ( 425) 635-7700</div>

| BELLEVUE LIFE SCIENCES ACQUISITION CORP.              |
| (Former Name or Former Address, if Changed Since Last 
 Report)                                               |

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:

| ☒ | 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   
 Symbol(s) |     | Name                                 
 of each exchange on which registered |
| Units, each                                                                               
 consisting of one share of common stock, one redeemable warrant and one right             |     | BLACU     |     | The