X0202 SCHEDULE 13G/A 0001539041-25-000076 0001539041 XXXXXXXX LIVE 2 Class A ordinary shares, par value $0.0001 per share 03/31/2026 0002049662 CARTESIAN GROWTH CORPORATION III G19307100 505 Fifth Avenue, 15th Floor New York NY 10017 Rule 13d-1(b) Picton Mahoney Asset Management Z4 1300000 0 1300000 0 1300000 4.71 PN Based on the Form 10-K filed March 23, 2026; as of March 18, 2026, there were 27,600,000 Class A. ordinary shares outstanding. CARTESIAN GROWTH CORPORATION III 505 Fifth Avenue, 15th Floor, New York, NEW YORK, 10017 Picton Mahoney Asset Management 33 Yonge Street, #320, Toronto, ON M5E 1G4 Canada N FI Investment Fund Manager 1300000 4.71 1300000 0 1300000 0 N Y Y Y Y Y N By signing below I certify that, to the best of my knowledge and belief, the foreign regulatory scheme applicable to [insert particular category of institutional investor] is substantially comparable to the regulatory scheme applicable to the functionally equivalent U.S. institution(s). I also undertake to furnish to the Commission staff, upon request, information that would otherwise be disclosed in a Schedule 13D. Picton Mahoney Asset Management Catrina Duong 04/27/2026 After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.