Exhibit 99.1 

Joint Filer Information

Name of Joint Filer:	Dune Acquisition Holdings II LLC
Address of Joint Filer:	c/o Dune Acquisition Corporation II 700 S. Rosemary Avenue, Suite 204 West Palm Beach, Florida 33401
Relationship of Joint Filer to Issuer:	10% Owner Director (Director by Deputization). Mr. Glatt serves as a Director of the Issuer. Dune Acquisition Holdings II LLC may be deemed a director by deputization as a result of such service of Mr. Glatt.
Issuer Name and Ticker or Trading Symbol:	Dune Acquisition Corporation II [IPOD]
Date of Event Requiring Statement:
(Month/Day/Year):	05/06/2025
Name of Joint Filer:	Carter Glatt
Address of Joint Filer:	c/o Dune Acquisition Corporation II 700 S. Rosemary Avenue, Suite 204 West Palm Beach, Florida 33401
Relationship of Joint Filer to Issuer:	10% Owner, Officer (Chief Executive Officer) and Director
Issuer Name and Ticker or Trading Symbol:	Dune Acquisition Corporation II [IPOD]
Date of Event Requiring Statement:	05/06/2025
Month/Day/Year):