Company: GIGGU
Filing Date: 2025-11-12
Form Type: S-4
Source: 0001193125-25-277896
Chunk: 0

Company: GigCapital7 Corp.
Filing Date: 2025-11-12
Form: S-4
Chunk 0
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As filed with the U.S. Securities and Exchange Commission on November 12, 2025. File No. [● ] UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-4 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 GigCapital7 Corp.* (Exact name of registrant as specified in its charter)

| Cayman Islands                                               |     |                                                   6770 |     | 98-1790710                            |
| (State or otherjurisdiction ofincorporation or organization) |     | -Primary Standard IndustrialClassification Code Number |     | -I.R.S. EmployerIdentification Number |

For Co-Registrants,see “Table of Co-Registrants”on the following page. 1731 Embarcadero Rd., Suite 200, Palo Alto, CA 94303 ( 650) 276-7040 (Address, including zip code, and telephone number, including area code, of registrant’s principalexecutive offices) Dr. Avi S. Katz Chairman and Chief Executive Officer GigCapital7 Corp. 1731 Embarcadero Rd., Suite 200 Palo Alto, CA 94303 ( 650) 276-7040 (Name, address, including zip code, and telephone number, including area code, of agent for service) Copies to:

| Jeffrey C. Selman                                            
 John Maselli                                                 
 DLA Piper LLP (US)555 Mission Street, Suite 2400             
 San Francisco, CA 94105Tel: (415)615-6095Fax: (415) 659 7465 |     | Andrew M. Tucker                         
 Rebekah D. McCorvey                      
 Duane Morris LLP                         
 901 New York Avenue N.W., Suite 700 East 
 Washington, DC 20001-4795                
 Tel: (202)776-5248                       
 atucker@duanemorris.com                  
 rmccorvey@duanemorris.com                |

Approximate date of commencement of proposed sale to the public:As soon as practicable after (i) this registration statement is declared effective and (ii) upon completion of the applicable transactions described in the enclosed proxy statement/prospectus. If the securities being registered on this Form are being offered in connection with the formation of a holding company and there is compliance with General Instruction G, check the following box: ☐ If this Form is filed to register additional securities for an offering pursuant to Rule 462