Rocket Lab (RKLB)

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-08-27 10b5-1 Pre-arranged Plan: Yes --- Issuer --- Name: Rocket Lab Corp (RKLB) CIK: 0001819994 --- Reporting Owner --- Name: Kampani Arjun CIK: 0001671507 Role: Officer (SVP & General Counsel) --- Non-Derivative Transactions --- [Transaction #1] Security: Common Stock Date: 2026-08-27 | Code: S (Open market sale) Shares: -4,600 | Price: $66.50 Total Value: $305,882.06 Shares Owned After: 252,351 | Ownership: D (Direct) Footnotes: [F1] 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. [F2] The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $65.8400 to $66.8100. 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. [Transaction #2] Security: Common Stock Date: 2026-08-27 | Code: S (Open market sale) Shares: -1,434 | Price: $67.16 Total Value: $96,304.43 Shares Owned After: 250,917 | Ownership: D (Direct) Footnotes: [F1] 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. [F3] The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $66.8400 to $67.5400. 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. --- Footnotes (Complete Index) --- F1: 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. F2: The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $65.8400 to $66.8100. 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. F3: The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $66.8400 to $67.5400. 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. --- Signature --- /s/ /s/Arjun Kampani (2026-08-28)