Company: SIDU
Filing Date: 2025-04-29
Form Type: DEFA14A
Source: 0001641172-25-006534
Chunk: 0

Company: Sidus Space Inc.
Filing Date: 2025-04-29
Form: DEFA14A
Chunk 0
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<div align='center'>UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934</div>

Filed by the Registrant ☒

Filed by a party other than the Registrant ☐

Check the appropriate box:

| ☐ | Preliminary                                                       
 Proxy Statement                                                   |
| ☐ | Confidential,                                                     
 for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) |
| ☐ | Definitive                                                        
 Proxy Statement                                                   |
| ☒ | Definitive                                                        
 Additional Materials                                              |
| ☐ | Soliciting                                                        
 Material under §240.14a-12                                        |

| Sidus                                      
 Space, Inc.                                |
| (Name                                      
 of Registrant as Specified In Its Charter) |

| (Name                                                              
 of Person(s) Filing Proxy Statement, if other than the Registrant) |

Payment of Filing Fee (Check all boxes that apply):

| ☒ | No                                                                                               
 fee required.                                                                                    |
| ☐ | Fee                                                                                              
 paid previously with preliminary materials.                                                      |
| ☐ | Fee                                                                                              
 computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11. |

| (1) | Title                                                                                                                              
 of each class of securities to which transaction applies:                                                                          |
| (2) | Aggregate                                                                                                                          
 number of securities to which transaction applies:                                                                                 |
| (3) | Per                                                                                                                                
 unit price or other underlying value of transaction computed pursuant to Exchange Act Rule 0-11 (set forth the amount on which the 
 filing fee is calculated and state how it was determined):                                                                         |
| (4) | Proposed                                                                                                                           
 maximum aggregate value of transaction:                                                                                            |
| (5) | Total                                                                                                                              
 fee paid:                                                                                                                          |

| ☐ | Check                                                                                                                               
 box if any part of the fee is offset as provided by Exchange Act Rule 0-11(a)(2) and identify the filing for which the offsetting   
 fee was paid previously. Identify the previous filing by registration statement number, or the Form or Schedule and the date of its 
 filing.                                                                                                                             |

| (1) | Amount                                  
 Previously Paid:                        |
| (2) | Form,                                   
 Schedule or Registration Statement No.: