X0609 4 2026-06-03 0 0001819994 Rocket Lab Corp RKLB 0001509421 Spice Adam C. false 3881 MCGOWEN STREET LONG BEACH CA 90808 0 1 0 0 Chief Financial Officer 0 Common Stock 2026-06-03 4 A 0 275319 0.0 A 1195644 D Common Stock 250000 I by Trust Represents restricted stock units (RSUs) granted to the Reporting Person under the Rocket Lab Corporation 2021 Stock Option and Incentive Plan. Such RSUs will vest as follows: 1/16 of the RSUs will vest on August 22, 2026 and 1/16 of the RSUs will vest on each March 1st, May 22nd, August 22nd or November 22nd thereafter, in each case subject to the Reporting Person's continuous service as an employee through each applicable vesting date. By: /s/ Arjun Kampani, as Attorney-in-Fact For: Adam Spice 2026-06-05