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  4. [Form 4] Rocket Lab Corp Insider Trading Activity

Rocket Lab Corp (RKLB) general counsel sells 6,034 shares via preset plan

Filing Impact
(Moderate)
Filing Sentiment
(Negative)
Form Type
4

Rhea-AI Filing Summary

Rocket Lab Corp (RKLB) insider Arjun Kampani, SVP & General Counsel, reported selling a total of 6,034 shares of common stock on August 27, 2026 under a Rule 10b5-1 trading plan. The sales were executed in two tranches at weighted-average prices within disclosed intraday ranges.

Positive

  • None.

Negative

  • None.
Insider Kampani Arjun
Role SVP & General Counsel
Sold 6,034 shs ($402K)
Type Security Shares Price Value
Sale Common Stock F1, F2 4,600 $66.4961 $306K
Sale Common Stock F1, F3 1,434 $67.1579 $96K
Holdings After Transaction: Common Stock — 250,917 shares (Direct)
Footnotes (3)
  1. 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.
  2. 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.
  3. 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.
Shares sold (first transaction) 4,600 shares of Common Stock Sale on August 27, 2026 by Arjun Kampani
Weighted-average price (first transaction) $66.4961 per share 4,600 shares sold; individual trade prices ranged from $65.8400 to $66.8100
Shares sold (second transaction) 1,434 shares of Common Stock Sale on August 27, 2026 by Arjun Kampani
Weighted-average price (second transaction) $67.1579 per share 1,434 shares sold; individual trade prices ranged from $66.8400 to $67.5400
Total shares sold 6,034 shares of Common Stock Combined total across both sales on August 27, 2026
Rule 10b5-1 trading plan regulatory
"Represents the sale of shares which occurred automatically pursuant to a Rule 10b5-1 trading plan"
A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.
weighted-average price financial
"The price reported in Column 4 is a weighted-average price"
Weighted-average price is the average of multiple prices where each price is counted according to its size or importance—larger trades carry more weight than smaller ones, like averaging course grades by credit hours. It matters to investors because it gives a more realistic picture of the true price paid or received, helping assess trade execution, compare performance, calculate cost basis, and value positions more accurately than a simple average.
Reporting Person regulatory
"The Reporting Person undertakes to provide the Registrant, any securityholder"

FAQ

What insider transaction did RKLB report for Arjun Kampani on August 27, 2026?
Arjun Kampani, SVP & General Counsel of Rocket Lab Corp (RKLB), reported selling a total of 6,034 shares of common stock on August 27, 2026 in open-market transactions, according to the Form 4 filing.

Were the recent RKLB insider sales by Arjun Kampani under a Rule 10b5-1 plan?
Yes. The filing states the sales occurred automatically pursuant to a Rule 10b5-1 trading plan adopted by Arjun Kampani on September 19, 2025, indicating the trades were pre-arranged rather than discretionary at the time of execution.

How many RKLB shares did Arjun Kampani sell in each transaction?
On August 27, 2026, Arjun Kampani sold 4,600 shares of Rocket Lab common stock in one transaction and 1,434 shares in a second transaction, for a combined total of 6,034 shares reported on the Form 4.

What prices were received in Arjun Kampani’s RKLB share sales?
The first sale of 4,600 shares had a weighted-average price of $66.4961, with individual trades ranging from $65.8400 to $66.8100. The second sale of 1,434 shares had a weighted-average price of $67.1579, with trades from $66.8400 to $67.5400.

Does the Form 4 disclose Arjun Kampani’s remaining RKLB holdings after these sales?
No. For both transactions, the field for total shares following the transaction is left blank in the Form 4 data, so the filing does not state Arjun Kampani’s remaining Rocket Lab share ownership after these sales.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Form 4 Insider Transactions: What Each Field Means →
SEC Form 4
FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number:3235-0287
Estimated average burden
hours per response:0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
X
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
Kampani Arjun
(Last)(First)(Middle)
3881 MCGOWEN STREET
(Street)
LONG BEACH CALIFORNIA 90808
(City)(State)(Zip)
UNITED STATES
(Country)		2. Issuer Name and Ticker or Trading Symbol
Rocket Lab Corp [ RKLB ] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director10% Owner
XOfficer (give title below)Other (specify below)
SVP & General Counsel
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
08/27/2026		6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year)2A. Deemed Execution Date, if any (Month/Day/Year)3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeVAmount(A) or (D)Price
Common Stock08/27/2026S4,600(1)D$66.4961(2)252,351D
Common Stock08/27/2026S1,434(1)D$67.1579(3)250,917D
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year)3A. Deemed Execution Date, if any (Month/Day/Year)4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year)7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Explanation of Responses:
1. 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.
2. 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.
3. 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.
/s/Arjun Kampani08/28/2026
** Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

Source: View Original Filing on SEC EDGAR