Exhibit 99.1 Rocket Lab Announces Second Quarter 2025 Financial Results, Posts Record Quarterly Revenue of $144m, Representing 36% Year-on-Year Growth, And Gross Margin Expansion Exceeding Expectations Long Beach, California. August 7, 2025 – Rocket Lab Corporation (Nasdaq: RKLB) ("Rocket Lab", "the Company", "we," "us," or "our"), a global leader in launch services and space systems, today shared the financial results for fiscal second quarter ended June 30, 2025. Rocket Lab founder and CEO, Sir Peter Beck ...