X0508 4 2026-03-02 0 0001819994 Rocket Lab Corp RKLB 0002037530 Klein Frank 3881 MCGOWEN STREET LONG BEACH CA 90808 0 1 0 0 Chief Operations Officer 1 Common Stock 2026-03-02 4 S 0 3182 66.8288 D 1166305 D Common Stock 2026-03-02 4 S 0 2244 67.9207 D 1164061 D Common Stock 2026-03-02 4 S 0 8173 69.1034 D 1155888 D Common Stock 2026-03-02 4 S 0 25971 70.0313 D 1129917 D Common Stock 2026-03-02 4 S 0 4912 70.617 D 1125005 D Common Stock 2026-03-04 4 S 0 2000 70.255 D 1123005 D Common Stock 2026-03-04 4 S 0 10296 71.3175 D 1112709 D Common Stock 2026-03-04 4 S 0 17675 72.0239 D 1095034 D Common Stock 2026-03-04 4 S 0 5597 73.0817 D 1089437 D Common Stock 2026-03-04 4 S 0 1200 73.8208 D 1088237 D Represents the sale of shares pursuant to a "sell-to-cover" transaction pursuant to a Rule 10b5-1 election adopted by the Reporting Person in order to satisfy applicable tax withholding obligations in connection with the vesting and settlement of restricted stock units previously granted to the Reporting Person. The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $66.4700 to $67.4500. The Reporting Person undertakes to provide the Registrant, any securityholder of the Registrant, or the Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $67.5000 to $68.4500. The Reporting Person undertakes to provide the Registrant, any securityholder of the Registrant, or the Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $68.4800 to $69.4600. The Reporting Person undertakes to provide the Registrant, any securityholder of the Registrant, or the Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $69.4700 to $70.4600. The Reporting Person undertakes to provide the Registrant, any securityholder of the Registrant, or the Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $70.4700 to $70.9450. The Reporting Person undertakes to provide the Registrant, any securityholder of the Registrant, or the Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. Represents the sale of shares which occurred automatically pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 19, 2025. The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $69.6400 to $70.6200. The Reporting Person undertakes to provide the Registrant, any securityholder of the Registrant, or the Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $70.6600 to $71.6500. The Reporting Person undertakes to provide the Registrant, any securityholder of the Registrant, or the Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $71.6600 to $72.6500. The Reporting Person undertakes to provide the Registrant, any securityholder of the Registrant, or the Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $72.6700 to $73.6400. The Reporting Person undertakes to provide the Registrant, any securityholder of the Registrant, or the Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $73.6800 to $73.9900. The Reporting Person undertakes to provide the Registrant, any securityholder of the Registrant, or the Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. By: /s/ Arjun Kampani, as Attorney-in-Fact For: Frank Klein 2026-03-04