Rocket Lab Corp (RKLB) · Insider Trading (Form 4) SEC Filing

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-05-26 10b5-1 Pre-arranged Plan: Yes --- Issuer --- Name: Rocket Lab Corp (RKLB) CIK: 0001819994 --- Reporting Owner --- Name: Spice Adam C. CIK: 0001509421 Role: Officer (Chief Financial Officer) --- Non-Derivative Transactions --- [Transaction #1] Security: Common Stock Date: 2026-05-26 | Code: S (Open market sale) Shares: -1,657 | Price: $139.41 Total Value: $231,006.02 Shares Owned After: 1,044,136 | Ownership: D (Direct) Footnotes: [F1] 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. [F2] The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $138.7700 to $139.7600. 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] Includes 527 shares acquired under the Rocket Lab Corporation 2021 Employee Stock Purchase Plan in transactions that were exempt under both Rule 16b-3(d) and Rule 16b-3(c). [Transaction #2] Security: Common Stock Date: 2026-05-26 | Code: S (Open market sale) Shares: -4,933 | Price: $140.20 Total Value: $691,614.99 Shares Owned After: 1,039,203 | Ownership: D (Direct) Footnotes: [F1] 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. [F4] The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $139.8000 to $140.8000. 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 #3] Security: Common Stock Date: 2026-05-26 | Code: S (Open market sale) Shares: -6,128 | Price: $141.46 Total Value: $866,844.21 Shares Owned After: 1,033,075 | Ownership: D (Direct) Footnotes: [F1] 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. [F5] The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $140.8200 to $141.8200. 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 #4] Security: Common Stock Date: 2026-05-26 | Code: S (Open market sale) Shares: -18,256 | Price: $142.35 Total Value: $2,598,832.88 Shares Owned After: 1,014,819 | Ownership: D (Direct) Footnotes: [F1] 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. [F6] The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $141.8300 to $142.8300. 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 #5] Security: Common Stock Date: 2026-05-26 | Code: S (Open market sale) Shares: -24,436 | Price: $143.24 Total Value: $3,500,293.28 Shares Owned After: 990,383 | Ownership: D (Direct) Footnotes: [F1] 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. [F7] The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $142.8400 to $143.8300. 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 #6] Security: Common Stock Date: 2026-05-26 | Code: S (Open market sale) Shares: -7,334 | Price: $144.13 Total Value: $1,057,039.89 Shares Owned After: 983,049 | Ownership: D (Direct) Footnotes: [F1] 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. [F8] The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $143.8500 to $144.7600. 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. --- Holdings --- [Holding #1] Security: Common Stock Ownership: I (Indirect) --- Footnotes (Complete Index) --- F1: 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. F2: The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $138.7700 to $139.7600. 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: Includes 527 shares acquired under the Rocket Lab Corporation 2021 Employee Stock Purchase Plan in transactions that were exempt under both Rule 16b-3(d) and Rule 16b-3(c). F4: The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $139.8000 to $140.8000. 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. F5: The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $140.8200 to $141.8200. 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. F6: The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $141.8300 to $142.8300. 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. F7: The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $142.8400 to $143.8300. 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. F8: The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $143.8500 to $144.7600. 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/ By: /s/ Arjun Kampani, as Attorney-in-Fact For: Adam Spice (2026-05-28)