Rocket Lab (RKLB) legal chief sells 52,472 shares under 10b5-1 plans

Rhea-AI Filing Summary

Rocket Lab Corp senior vice president and general counsel Arjun Kampani reported selling a total of 52,472 shares of Rocket Lab common stock in open-market transactions. The sales occurred on March 2 and March 4, 2026 at weighted-average prices generally in the mid-$60s to low-$70s per share. Part of the sale was a sell-to-cover transaction under a Rule 10b5-1 election to satisfy tax withholding obligations tied to the vesting and settlement of previously granted restricted stock units. The remaining sales occurred automatically under a Rule 10b5-1 trading plan adopted on September 19, 2025. After these trades, Kampani directly owned 397,988 Rocket Lab common shares.

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 CA 90808

(City) (State) (Zip)

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

3. Date of Earliest Transaction (Month/Day/Year)
03/02/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

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

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

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	03/02/2026		S		2,058(1)	D	$66.8288(2)	448,402	D
Common Stock	03/02/2026		S		1,451(1)	D	$67.9207(3)	446,951	D
Common Stock	03/02/2026		S		5,284(1)	D	$69.1034(4)	441,667	D
Common Stock	03/02/2026		S		16,792(1)	D	$70.0313(5)	424,875	D
Common Stock	03/02/2026		S		3,176(1)	D	$70.617(6)	421,699	D
Common Stock	03/04/2026		S		2,436(7)	D	$70.5156(8)	419,263	D
Common Stock	03/04/2026		S		11,022(7)	D	$71.6184(9)	408,241	D
Common Stock	03/04/2026		S		7,140(7)	D	$72.314(10)	401,101	D
Common Stock	03/04/2026		S		3,013(7)	D	$73.3561(11)	398,088	D
Common Stock	03/04/2026		S		100(7)	D	$74.09	397,988	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 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 $66.4700 to $67.4500. 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.

3. The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $67.5000 to $68.4500. 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.

4. The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $68.4800 to $69.4600. 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.

5. The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $69.4700 to $70.4600. 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.

6. The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $70.4700 to $70.9450. 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. 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.

8. The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $69.9600 to $70.9500. 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 $70.9700 to $71.9600. 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.

10. The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $71.9700 to $72.9300. 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.

11. The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $72.9700 to $73.8400. 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	03/04/2026
	** 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.

FAQ

What did Rocket Lab (RKLB) insider Arjun Kampani report on this Form 4?

Arjun Kampani, Rocket Lab’s SVP and general counsel, reported selling 52,472 shares of common stock. These were open-market transactions executed under Rule 10b5-1 arrangements, including sales to cover tax withholding on vested restricted stock units.

How many Rocket Lab (RKLB) shares did Arjun Kampani sell and on which dates?

Kampani sold a total of 52,472 Rocket Lab common shares. The transactions took place on March 2, 2026 and March 4, 2026, through a series of open-market sales at various weighted-average prices disclosed in the filing.

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

Yes. Some shares were sold under a Rule 10b5-1 election to cover tax withholding on vested restricted stock units, and other sales occurred automatically under a Rule 10b5-1 trading plan adopted on September 19, 2025, as described in the footnotes.

How many Rocket Lab (RKLB) shares does Arjun Kampani own after these transactions?

After completing the reported sales, Arjun Kampani directly owned 397,988 shares of Rocket Lab common stock. This post-transaction holding reflects the remaining balance following all the March 2 and March 4, 2026 open-market sales.

What prices were received in Arjun Kampani’s Rocket Lab (RKLB) stock sales?

Each transaction reports a weighted-average sale price, with individual trades executed in ranges. The footnotes state price ranges generally from about $66.47 to $73.84 per share, and Kampani offers to provide full per-trade detail upon request.

Why did Arjun Kampani sell some Rocket Lab (RKLB) shares to cover taxes?

A portion of the shares sold represents a sell-to-cover transaction to satisfy tax withholding obligations. These obligations arose from the vesting and settlement of restricted stock units previously granted to Kampani as part of his Rocket Lab compensation.