144 0001671507 XXXXXXXX LIVE 0001819994 Rocket Lab Corp 001-39560 3881 MCGOWEN STREET LONG BEACH CA 90808 714-465-5737 Kampani Arjun Officer Common MORGAN STANLEY SMITH BARNEY LLC EXECUTIVE SERVICES

200 W CIVIC CENTER DR. 4TH FLOOR SANDY UT 84070

7754 539850.08 598459739 08/24/2026 NASDAQ Common 08/22/2026 Restricted Stock Vesting Issuer N 13788 08/22/2026 Compensation N ARJUN KAMPANI

3881 McGowen Street Long Beach CA 90808

Common 05/28/2026 23804 3509510.74 ARJUN KAMPANI

3881 McGowen Street Long Beach CA 90808

Common 05/27/2026 60900 8793783.39 ARJUN KAMPANI

3881 McGowen Street Long Beach CA 90808

Common 05/27/2026 9100 1365000.00 ARJUN KAMPANI

3881 McGowen Street Long Beach CA 90808

Common 05/26/2026 28668 4087297.08 Sale includes an amount necessary to cover a tax obligation resulting from the settlement of a vested equity award distribution. 08/24/2026 09/19/2025 /s/ Arjun Kampani