This 8-K reports Vector Acquisition Corporation, a blank-check SPAC, closing its initial public offering (IPO) on September 29, 2020. The IPO involved 30,000,000 units priced at $10.00 per unit, generating $300 million in gross proceeds alongside a simultaneous private placement of 5,333,333 warrants to Vector Acquisition Partners, L.P. at $1.50 each. The aggregate offering proceeds of $300 million were deposited into a trust account with Continental Stock Transfer & Trust Company, accessible only for an initial business combination, redemption after 24 months without one, or specific shareholder votes amending share redemption rights. An audited balance sheet as of the closing date is attached as Exhibit 99.1. This event is foundational as Vector later merged with Rocket Lab USA in 2021, enabling Rocket Lab's public listing on NASDAQ under RKLB.

This SPAC IPO provided Vector with $300M in trust to pursue a business combination, directly enabling its 2021 de-SPAC merger with Rocket Lab, which brought RKLB public and funded growth. Near-term, it strengthened Vector's balance sheet with liquid capital; strategically, it positioned Rocket Lab for scaled launch operations post-merger. Investors should note this historical liquidity infusion supported RKLB's expansion without dilution until merger. No immediate operational impact on Rocket Lab, but pivotal for its public market access.