=== SEC Form 4 — Statement of Changes in Beneficial Ownership ===
Document Type: 4
Period of Report: 2026-09-02
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: 2026-09-02 | Code: M (Exercise of derivative)
Shares: +140,157 | Price: $1.09
Total Value: $152,771.13
Shares Owned After: 1,296,124 | Ownership: D (Direct)
[Transaction #2]
Security: Common Stock
Date: 2026-09-02 | Code: S (Open market sale)
Shares: -67,257 | Price: $62.26
Total Value: $4,187,178.69
Shares Owned After: 1,228,867 | 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 June 03, 2026.
[F2] The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $61.5900 to $62.5800. 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: 2026-09-02 | Code: S (Open market sale)
Shares: -72,900 | Price: $62.97
Total Value: $4,590,542.16
Shares Owned After: 1,155,967 | 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 June 03, 2026.
[F3] The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $62.5900 to $63.4700. 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.
--- Derivative Transactions ---
[Transaction #1]
Security: Employee Stock Option (right to buy)
Date: 2026-09-02 | Code: M (Exercise of derivative)
Shares: -140,157 | Price: $0.00
Exercise Price: $1.09
Exercisable: N/A | Expires: 2028-08-03
Shares Owned After: 2,382,668 | Ownership: D (Direct)
Footnotes:
[F4] The stock option was granted on August 3, 2018, and had a vesting commencement date of May 25, 2018. 1/4 of the shares subject to the stock option vest on the one year anniversary of the vesting commencement date, and 1/48 of the shares subject to the stock option vest on a monthly basis each month thereafter, subject, in each case, to the reporting person's continued service relationship through each applicable vesting date.
--- Holdings ---
[Holding #1]
Security: Common Stock
Ownership: I (Indirect)
--- 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 June 03, 2026.
F2: The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $61.5900 to $62.5800. 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 $62.5900 to $63.4700. 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.
F4: The stock option was granted on August 3, 2018, and had a vesting commencement date of May 25, 2018. 1/4 of the shares subject to the stock option vest on the one year anniversary of the vesting commencement date, and 1/48 of the shares subject to the stock option vest on a monthly basis each month thereafter, subject, in each case, to the reporting person's continued service relationship through each applicable vesting date.
--- Signature ---
/s/ By: /s/ Arjun Kampani, as Attorney-in-Fact For: Adam Spice (2026-09-04)
