Adam C. Spice - 02 Sep 2026 Form 4 Insider Report for Rocket Lab Corp (RKLB)

Reporting relationship: Chief Financial Officer
Issuer ticker: RKLB
Reported as of: 02 Sep 2026
Net transaction value: -$8,777,721
SEC form: 4
Accepted by SEC: 04 Sep 2026, 18:12:34 UTC
Prior SEC filing: 26 Aug 2026
Source filing: View source filing
Reporting owner signature: By: /s/ Arjun Kampani, as Attorney-in-Fact For: Adam Spice

Key filing fact

Adam C. Spice filed Form 4 for Rocket Lab Corp (RKLB) on 04 Sep 2026.

Key facts

This page summarizes Adam C. Spice's Form 4 filing for Rocket Lab Corp (RKLB).
4 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 04 Sep 2026, 18:12.

Change

Previous filing in this sequence was filed on 26 Aug 2026.
Current net transaction value: -$8,777,721.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001509421 Primary reporting owner

Spice Adam C.

Relationship: Chief Financial Officer
Address: 3881 MCGOWEN STREET, LONG BEACH
Signature: By: /s/ Arjun Kampani, as Attorney-in-Fact For: Adam Spice
Signature date: 04 Sep 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

RKLB transaction

Common Stock

Options Exercise

Transaction value
Shares: +140,157
Change %: +12%
Price: $1.09^*
Shares after: 1,296,124
Date: 02 Sep 2026
Ownership: Direct

RKLB transaction

Common Stock

Sale

Transaction value: $4,187,179
Shares: -67,257
Change %: -5.2%
Price: $62.26
Shares after: 1,228,867
Date: 02 Sep 2026
Ownership: Direct
Footnotes: F1, F2

RKLB transaction

Common Stock

Sale

Transaction value: $4,590,542
Shares: -72,900
Change %: -5.9%
Price: $62.97
Shares after: 1,155,967
Date: 02 Sep 2026
Ownership: Direct
Footnotes: F1, F3

RKLB holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 250,000
Date: 02 Sep 2026
Ownership: by Trust

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

RKLB transaction Derivative

Employee Stock Option (right to buy)

Options Exercise

Transaction value
Shares: -140,157
Change %: -5.6%
Price: $0.000000^*
Shares after: 2,382,668
Date: 02 Sep 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 140,157
Exercise price: $1.09
Footnotes: F4

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Rule 10b5-1 trading plan

These transactions were reported as open-market trades under a Rule 10b5-1 plan. The plan lets an insider set trading instructions in advance, which can reduce the risk of trading while in possession of material nonpublic information.

Original filing language: transaction made pursuant to a contract, instruction, or written plan intended to satisfy Rule 10b5-1(c).

Explanation of responses 4 footnotes

Footnote 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.

Footnote 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.

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.

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.