Frank Klein - 28 May 2026 Form 4 Insider Report for Rocket Lab Corp (RKLB)

Reporting relationship: Chief Operations Officer
Issuer ticker: RKLB
Reported as of: 28 May 2026
Net transaction value: -$5,433,998
SEC form: 4
Accepted by SEC: 01 Jun 2026, 18:11:27 UTC
Prior SEC filing: 28 May 2026
Source filing: View source filing
Reporting owner signature: By: /s/ Arjun Kampani, as Attorney-in-Fact For: Frank Klein

Key filing fact

Frank Klein filed Form 4 for Rocket Lab Corp (RKLB) on 01 Jun 2026.

Key facts

This page summarizes Frank Klein's Form 4 filing for Rocket Lab Corp (RKLB).
8 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 01 Jun 2026, 18:11.

Change

Previous filing in this sequence was filed on 28 May 2026.
Current net transaction value: -$5,433,998.

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 0002037530 Primary reporting owner

Klein Frank

Relationship: Chief Operations Officer
Address: 3881 MCGOWEN STREET, LONG BEACH
Signature: By: /s/ Arjun Kampani, as Attorney-in-Fact For: Frank Klein
Signature date: 01 Jun 2026

Reported non-derivative transactions

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

RKLB transaction

Common Stock

Sale

Transaction value: $100,138
Shares: -700
Change %: -0.07%
Price: $143.05
Shares after: 1,043,147
Date: 28 May 2026
Ownership: Direct
Footnotes: F1, F2

RKLB transaction

Common Stock

Sale

Transaction value: $389,204
Shares: -2,700
Change %: -0.26%
Price: $144.15
Shares after: 1,040,447
Date: 28 May 2026
Ownership: Direct
Footnotes: F1, F3

RKLB transaction

Common Stock

Sale

Transaction value: $232,369
Shares: -1,600
Change %: -0.15%
Price: $145.23
Shares after: 1,038,847
Date: 28 May 2026
Ownership: Direct
Footnotes: F1, F4

RKLB transaction

Common Stock

Sale

Transaction value: $585,084
Shares: -4,000
Change %: -0.39%
Price: $146.27
Shares after: 1,034,847
Date: 28 May 2026
Ownership: Direct
Footnotes: F1, F5

RKLB transaction

Common Stock

Sale

Transaction value: $1,457,932
Shares: -9,909
Change %: -0.96%
Price: $147.13
Shares after: 1,024,938
Date: 28 May 2026
Ownership: Direct
Footnotes: F1, F6

RKLB transaction

Common Stock

Sale

Transaction value: $1,287,840
Shares: -8,694
Change %: -0.85%
Price: $148.13
Shares after: 1,016,244
Date: 28 May 2026
Ownership: Direct
Footnotes: F1, F7

RKLB transaction

Common Stock

Sale

Transaction value: $1,170,095
Shares: -7,848
Change %: -0.77%
Price: $149.09
Shares after: 1,008,396
Date: 28 May 2026
Ownership: Direct
Footnotes: F1, F8

RKLB transaction

Common Stock

Sale

Transaction value: $211,335
Shares: -1,409
Change %: -0.14%
Price: $149.99
Shares after: 1,006,987
Date: 28 May 2026
Ownership: Direct
Footnotes: F1, F9

^* 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 9 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 September 19, 2025.

Footnote F2

The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $142.5900 to $143.4600. 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.

Footnote F3

The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $143.5900 to $144.5800. 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 F4

The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $144.6200 to $145.6000. 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 F5

The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $145.6200 to $146.5900. 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 F6

The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $146.6300 to $147.6200. 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.

Footnote F7

The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $147.6300 to $148.6100. 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 F8

The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $148.6400 to $149.6300. 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 F9

The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $149.7600 to $150.4500. 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.