Company: CGCT
Filing Date: 2025-05-01
Form Type: S-1MEF
Source: 0001104659-25-043663
Chunk: 0

Company: Cartesian Growth Corp III
Filing Date: 2025-05-01
Form: S-1MEF
Chunk 0
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<div align='center'>As filed with the U.S. Securities and Exchange Commission on May 1, 2025.</div>

Registration No. 333-

<div align='center'>UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM S-1
REGISTRATION STATEMENT
UNDER
THE SECURITIES ACT OF 1933

CARTESIAN GROWTH CORPORATION III

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

| Cayman Islands                  |     |                         6770 |     | N/A                   |
| (State or other jurisdiction of 
 incorporation or organization)  |     | -Primary Standard Industrial 
   Classification Code Number |     | -I.R.S. Employer      
 Identification Number |

<div align='center'>505 Fifth Avenue, 15 Floor
New York, New York 10017

Tel: (212) 461-6363

(Address, including zip code, and telephone number,
including area code, of registrant’s principal executive offices)

Peter Yu, Chief Executive OfficerCartesian Growth Corporation III
505 Fifth Avenue, 15 Floor
New York, New York 10017

Tel: (212) 461-6363

(Name, address, including zip code, and telephone
number, including area code, of agent for service)

Copies to:</div>

| Alan I. Annex, Esq.     
 Tricia Branker, Esq.    
 Thomas R. Martin, Esq.  
 Greenberg Traurig, P.A. 
 333 S.E. 2nd Avenue     
 Miami, Florida 33131    
 Tel: (305) 579-0576     
 Fax: (305) 579-0717     |     | Douglas S. Ellenoff, Esq.      
 Stuart Neuhauser, Esq.         
 Anthony Ain, Esq.              
 Ellenoff Grossman & Schole LLP 
 1345 Avenue of the Americas    
 New York, New York 10105       
 Tel: (212) 370-1300            
 Fax: (212) 370-7889            |

Approximate date of commencement of proposed sale to the public: As soon as practicable after the effective date of this registration statement.

If any of the securities being registered on this
Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933 check the following box.
¨

If this Form is