Dune Acquisition Corporation announced a private placement and issued an unsecured promissory note to returning investor, Dune Acquisition Holdings LLC for gross proceeds of $300,000 on June 21, 2023. The Sponsor note does not bear interest and is payable on the earlier of December 31, 2023 and the completion of the Business Combination . The Sponsor note is subject to customary events of default, the occurrence of any of which automatically triggers the unpaid principal balance of the Sponsor Note and all other sums payable with regard to the Sponsor Note to become immediately due and payable.