Rocket Lab SVP sells 23,804 shares under 10b5-1 plan

Rocket Lab Corp reported that SVP & General Counsel Arjun Kampani sold a total of 23,804 shares of common stock in open-market transactions on May 28, 2026.

Rhea-AI Filing Summary

Rocket Lab Corp reported that SVP & General Counsel Arjun Kampani sold a total of 23,804 shares of common stock in open-market transactions on May 28, 2026. These sales were executed under a pre-arranged Rule 10b5-1 trading plan adopted on September 19, 2025, at weighted-average prices ranging from $142.76 to $150.42. No derivative securities transactions were reported in this filing.

Insider Trade Summary 10b5-1

Net Seller: 23,804 shares

Net Sell 8 txns

Insider Kampani Arjun

Role SVP & General Counsel

Sold 23,804 shs ($3.51M)

Type	Security	Shares	Price	Value
Sale	Common Stock	500	$143.146	$72K
Sale	Common Stock	1,900	$144.3295	$274K
Sale	Common Stock	1,090	$145.5162	$159K
Sale	Common Stock	4,310	$146.6229	$632K
Sale	Common Stock	6,698	$147.5082	$988K
Sale	Common Stock	6,006	$148.5174	$892K
Sale	Common Stock	3,100	$149.3861	$463K
Sale	Common Stock	200	$150.26	$30K

Holdings After Transaction: Common Stock — 352,705 shares (Direct)

Footnotes (9)

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 $142.7600 to $143.6600. 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 $143.9300 to $144.7100. 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. F4. The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $144.9300 to $145.8300. 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.
5. F5. The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $145.9900 to $146.9800. 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. F6. The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $147.0100 to $148.0000. 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. F7. The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $148.0100 to $149.0000. 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. F8. The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $149.0100 to $149.9400. 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.
9. F9. The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $150.1000 to $150.4200. 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

Total shares sold: 23,804 shares Highest reported weighted-average price: $150.26 per share Lowest price range: $142.76–$143.66 per share +4 more

7 metrics

Total shares sold 23,804 shares Aggregate common stock sold on May 28, 2026

Highest reported weighted-average price $150.26 per share One of eight open-market sale transactions

Lowest price range $142.76–$143.66 per share Weighted-average sale price range noted in footnote

Highest price range $150.10–$150.42 per share Weighted-average sale price range noted in footnote

Number of sale transactions 8 transactions Non-derivative open-market sales of common stock

Trading plan adoption date September 19, 2025 Rule 10b5-1 trading plan used for these sales

Trade date May 28, 2026 Date all reported common stock sales occurred

Key Terms

Rule 10b5-1 trading plan, weighted-average price, open-market sale, non-derivative, +1 more

5 terms

Rule 10b5-1 trading plan regulatory

"Represents the sale of shares which occurred automatically pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person"

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. These shares were sold in multiple transactions"

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.

open-market sale financial

"transaction_action": "open-market sale", "transaction_code_description": "Sale in open market or private transaction""

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

non-derivative financial

""transaction_type": "non-derivative", "security_title": "Common Stock""

derivative transaction count financial

""derivativeTransactionCount": 0, "exerciseCount": 0"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

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

Rocket Lab disclosed that SVP & General Counsel Arjun Kampani sold 23,804 shares of common stock in open-market trades on May 28, 2026. The Form 4 shows multiple sale transactions executed under a pre-arranged Rule 10b5-1 trading plan.

How many Rocket Lab (RKLB) shares did Arjun Kampani sell and at what prices?

Arjun Kampani sold a total of 23,804 Rocket Lab common shares across eight open-market transactions. Weighted-average sale prices ranged from about $142.76 to $150.42 per share, with individual reported averages including $150.26, $149.39, $148.52 and lower price levels.

Were Arjun Kampani’s Rocket Lab (RKLB) share sales made under a Rule 10b5-1 plan?

Yes. The filing states the sales occurred automatically under a Rule 10b5-1 trading plan adopted on September 19, 2025. Such plans pre-schedule trades, helping separate personal portfolio decisions from day-to-day market timing considerations.

Did the Rocket Lab (RKLB) Form 4 report any option exercises or derivative transactions?

No. The Form 4 lists only non-derivative common stock sales for Arjun Kampani. The derivative transaction count and exerciseShares fields are zero, indicating no option exercises, conversions, or other derivative security activities in this particular filing.

What does a weighted-average sale price mean in the Rocket Lab (RKLB) Form 4?

Weighted-average price means multiple trades occurred within a price range, reported as a single averaged figure. The filing notes Rocket Lab will provide full detail of shares sold at each separate price within each range upon request to investors or regulators.

How many individual sale transactions did Arjun Kampani execute in Rocket Lab (RKLB) stock?

The data show eight separate non-derivative sale transactions in Rocket Lab common stock on May 28, 2026. Each transaction has its own share amount and weighted-average sale price, collectively adding up to 23,804 shares sold.

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

Form 4 Insider Transactions: What Each Field Means →

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Accepted by SEC EDGAR 06/01/2026 - 06:10 PM EDT Learn about SEC filing dates

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).

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)

	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)
05/28/2026

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)
			Code	V	Amount	(A) or (D)	Price
Common Stock	05/28/2026		S		500(1)	D	$143.146(2)	376,009	D
Common Stock	05/28/2026		S		1,900(1)	D	$144.3295(3)	374,109	D
Common Stock	05/28/2026		S		1,090(1)	D	$145.5162(4)	373,019	D
Common Stock	05/28/2026		S		4,310(1)	D	$146.6229(5)	368,709	D
Common Stock	05/28/2026		S		6,698(1)	D	$147.5082(6)	362,011	D
Common Stock	05/28/2026		S		6,006(1)	D	$148.5174(7)	356,005	D
Common Stock	05/28/2026		S		3,100(1)	D	$149.3861(8)	352,905	D
Common Stock	05/28/2026		S		200(1)	D	$150.26(9)	352,705	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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount 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 $142.7600 to $143.6600. 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 $143.9300 to $144.7100. 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 $144.9300 to $145.8300. 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.

5. The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $145.9900 to $146.9800. 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 $147.0100 to $148.0000. 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 $148.0100 to $149.0000. 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 $149.0100 to $149.9400. 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.

9. The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $150.1000 to $150.4200. 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	06/01/2026
	** 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)