X0609 4 2026-03-24 0 0001819994 Rocket Lab Corp RKLB 0001671507 Kampani Arjun false C/O ROCKET LAB CORPORATION 3881 MCGOWEN STREET LONG BEACH CA 90808 0 1 0 0 SVP & General Counsel 0 Common Stock 2026-03-24 4 A 0 77189 0 A 475177 D 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 March 1, 2028 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 through each applicable vesting date. /s/Arjun Kampani 2026-03-26