Rocket Lab (RKLB) GC sells 98,668 shares in Rule 10b5-1 tax trade

Filing Impact

(Very High)

Filing Sentiment

(Very Negative)

Form Type

Rhea-AI Filing Summary

Rocket Lab Corp senior vice president and general counsel Arjun Kampani reported open-market sales of company common stock to cover taxes tied to equity compensation. He sold a total of 98,668 shares on May 26–27, 2026 pursuant to a pre-arranged Rule 10b5-1 "sell-to-cover" election for tax withholding on vested restricted stock units. Trade prices were reported as weighted-average figures for multiple executions, including $150.0000 and $139.4122 per share. Following these transactions, Kampani directly holds 376,509 shares of Rocket Lab common stock.

Insider Trade Summary 10b5-1

Net Seller: 98,668 shares ($14,246,080)

Net Sell 8 txns

Insider Kampani Arjun

Role SVP & General Counsel

Sold 98,668 shs ($14.25M)

Type	Security	Shares	Price	Value
Sale	Common Stock	60,900	$144.3971	$8.79M
Sale	Common Stock	9,100	$150.00	$1.36M
Sale	Common Stock	757	$139.4122	$106K
Sale	Common Stock	2,254	$140.2017	$316K
Sale	Common Stock	2,800	$141.4563	$396K
Sale	Common Stock	8,341	$142.355	$1.19M
Sale	Common Stock	11,165	$143.2433	$1.60M
Sale	Common Stock	3,351	$144.1287	$483K

Holdings After Transaction: Common Stock — 385,609 shares (Direct, null)

Footnotes (1)

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. 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. 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. 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. 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. 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. 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. The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $144.1000 to $144.7050. 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.

Key Figures

Shares sold: 98,668 shares Shares held after: 376,509 shares Example sale price: $150.0000 per share +2 more

5 metrics

Shares sold 98,668 shares Total common shares sold on May 26–27, 2026

Shares held after 376,509 shares Direct common stock holdings following transactions

Example sale price $150.0000 per share Weighted-average price for one reported trade

Example sale price $139.4122 per share Weighted-average price for another reported trade

Net share direction 98,668 net shares sold transactionSummary netBuySellShares

Key Terms

sell-to-cover, Rule 10b5-1, restricted stock units, weighted-average price

4 terms

sell-to-cover financial

"Represents the sale of shares pursuant to a "sell-to-cover" transaction pursuant to a Rule 10b5-1 election"

Sell-to-cover is when part of newly issued or exercised company stock is immediately sold to pay required taxes and fees, so the recipient keeps the remaining shares. For investors this matters because it reduces the number of shares insiders or employees actually hold after a grant, can create small, routine share sales that aren’t signal of cashing out, and slightly increases share supply on the market—like selling a portion of a paycheck to cover the tax bill.

Rule 10b5-1 regulatory

"pursuant to a "sell-to-cover" transaction pursuant to a Rule 10b5-1 election adopted by the Reporting Person"

Rule 10b5-1 is a regulation that allows company insiders to buy or sell their shares at predetermined times, even if they have access to non-public information. It acts like setting a schedule in advance for transactions, helping prevent accusations of unfair trading. This rule provides a way for insiders to plan trades transparently, giving investors confidence that these transactions are not based on hidden information.

restricted stock units financial

"tax withholding obligations in connection with the vesting and settlement of restricted stock units previously granted"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

weighted-average price financial

"The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions"

Form 4 Insider Transactions: What Each Field Means →

05/28/2026 - 08:22 PM

SEC Form 4

FORM 4

UNITED 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).

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)

	Director	10% Owner
X	Officer (give title below)	Other (specify below)
	SVP & General Counsel

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/26/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form 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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	05/26/2026		S		757⁽¹⁾	D	$139.4122⁽²⁾	474,420	D
Common Stock	05/26/2026		S		2,254⁽¹⁾	D	$140.2017⁽³⁾	472,166	D
Common Stock	05/26/2026		S		2,800⁽¹⁾	D	$141.4563⁽⁴⁾	469,366	D
Common Stock	05/26/2026		S		8,341⁽¹⁾	D	$142.355⁽⁵⁾	461,025	D
Common Stock	05/26/2026		S		11,165⁽¹⁾	D	$143.2433⁽⁶⁾	449,860	D
Common Stock	05/26/2026		S		3,351⁽¹⁾	D	$144.1287⁽⁷⁾	446,509	D
Common Stock	05/27/2026		S		60,900	D	$144.3971⁽⁸⁾	385,609	D
Common Stock	05/27/2026		S		9,100	D	$150	376,509	D

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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

Explanation of Responses:

1. 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.

2. 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.

3. 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.

4. 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.

5. 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.

6. 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.

7. 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.

8. The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $144.1000 to $144.7050. 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 Kampani	05/28/2026
	** Signature of Reporting Person	Date
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

FAQ

What insider transaction did Rocket Lab (RKLB) report for Arjun Kampani?

Rocket Lab reported that SVP and general counsel Arjun Kampani sold 98,668 shares of common stock. These open-market sales on May 26–27, 2026 were part of a sell-to-cover arrangement for tax withholding on vested restricted stock units.

Why did Rocket Lab (RKLB) executive Arjun Kampani sell shares?

The filing states the sales were a "sell-to-cover" transaction under a Rule 10b5-1 election. Proceeds were used to satisfy applicable tax withholding obligations arising from the vesting and settlement of previously granted restricted stock units.

How many Rocket Lab (RKLB) shares does Arjun Kampani hold after the Form 4 trades?

After the reported transactions, Arjun Kampani directly holds 376,509 shares of Rocket Lab common stock. This post-transaction balance reflects the net position following the 98,668 shares sold to cover tax obligations on vested restricted stock units.

At what prices were the Rocket Lab (RKLB) shares sold by Arjun Kampani?

The sales were executed at weighted-average prices reported for multiple trades. Examples include prices of $150.0000 and $139.4122 per share, with detailed price ranges for each trade available on request as described in the Form 4 footnotes.

Was the Rocket Lab (RKLB) insider sale made under a Rule 10b5-1 plan?

Yes. The Form 4 footnote explains that the sales occurred under a Rule 10b5-1 election adopted by the reporting person. This pre-arranged plan governed the sell-to-cover trades for tax withholding on vested restricted stock units.