Rocket Lab Corp

Vector Acquisition Corporation, trading under the ticker VACQ and sponsored by Vector Capital, completed its initial public offering in 2021 targeting the aerospace and space technology sector. The blank-check vehicle successfully closed its business combination with Rocket Lab USA, bringing the orbital launch and spacecraft services company to public markets under its successor identity, Rocket Lab Corp. On May 12, 2026, Rocket Lab Corp filed a Form DEFA14A — additional definitive proxy soliciting materials — with the Securities and Exchange Commission, accession number 0001819994-26-000033, reflecting continued shareholder engagement activity at the post-merger company. Visit SpacDesk and sign up for full data access to track this filing and every other SPAC transaction in real time.