Did Rocket Lab (RKLB) mention any recent share acquisitions by Marvin Bradford Clevenger?

Yes, the filing notes 589 shares acquired under the 2021 Employee Stock Purchase Plan. These ESPP purchases were described as exempt under Rule 16b-3(d) and Rule 16b-3(c), providing additional context on the executive’s recent share activity.

Rocket Lab Corp (NASDAQ: RKLB) president sells 15,549 shares in tax sell-to-cover

Filing Impact

(Very High)

Filing Sentiment

(Negative)

Form Type

Rhea-AI Filing Summary

Rocket Lab Corp executive Marvin Bradford Clevenger, President of Rocket Lab USA, Inc, reported selling 15,549 shares of common stock on May 26, 2026. The six open-market sales occurred at weighted-average prices between about 139 and 144 per share.

According to the disclosure, these transactions were a sell-to-cover event to satisfy tax withholding obligations triggered by the vesting and settlement of previously granted restricted stock units. The filing notes that additional shares were recently acquired under Rocket Lab’s 2021 Employee Stock Purchase Plan in exempt transactions.

Insider Trade Summary

Net Seller: 15,549 shares ($2,216,875)

Net Sell 6 txns

Insider Clevenger Marvin Bradford

Role President, Rocket Lab USA, Inc

Sold 15,549 shs ($2.22M)

Type	Security	Shares	Price	Value
Sale	Common Stock	411	$139.4122	$57K
Sale	Common Stock	1,222	$140.2017	$171K
Sale	Common Stock	1,519	$141.4563	$215K
Sale	Common Stock	4,524	$142.355	$644K
Sale	Common Stock	6,055	$143.2433	$867K
Sale	Common Stock	1,818	$144.1287	$262K

Holdings After Transaction: Common Stock — 492,613 shares (Direct, null)

Footnotes (1)

Represents the sale of shares pursuant to a "sell-to-cover" transaction 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. Includes 589 shares acquired under the Rocket Lab Corporation 2021 Employee Stock Purchase Plan in transactions that were exempt under both Rule 16b-3(d) and Rule 16b-3(c). 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.

Key Figures

Shares sold: 15,549 shares Sale price (weighted-average high): 144.1287 per share Sale price (weighted-average low): 139.4122 per share +2 more

5 metrics

Shares sold 15,549 shares Total Rocket Lab common shares sold on May 26, 2026

Sale price (weighted-average high) <money>144.1287</money> per share Highest reported weighted-average sale price among the six transactions

Sale price (weighted-average low) <money>139.4122</money> per share Lowest reported weighted-average sale price among the six transactions

Number of sale transactions 6 transactions Open-market sales of Rocket Lab common stock on May 26, 2026

ESPP shares acquired 589 shares Shares acquired under Rocket Lab 2021 Employee Stock Purchase Plan

Key Terms

sell-to-cover, restricted stock units, weighted-average price, Employee Stock Purchase Plan, +1 more

5 terms

sell-to-cover financial

"Represents the sale of shares pursuant to a "sell-to-cover" transaction in order to satisfy applicable tax withholding obligations"

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.

restricted stock units financial

"in connection with the vesting and settlement of restricted stock units previously granted to the Reporting Person"

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"

Employee Stock Purchase Plan financial

"Includes 589 shares acquired under the Rocket Lab Corporation 2021 Employee Stock Purchase Plan"

An employee stock purchase plan is a company program that lets workers buy shares through small payroll deductions, often at a discount to the market price and after a set offering period. Think of it like a workplace savings plan that turns into ownership: it encourages employees to share in the company’s success and can create predictable buying or selling of stock that investors watch because it affects supply, demand and employee incentives.

Rule 16b-3(d) regulatory

"transactions that were exempt under both Rule 16b-3(d) and Rule 16b-3(c)"

Rule 16b-3(d) is a narrow SEC safe-harbor that shields company insiders (officers, directors and large shareholders) from liability for short‑swing profits when their buys or sells of company stock are made under a pre-established, written plan or contract that removes the insider’s ability to time trades. For investors, this matters because it permits predictable, automated insider transactions — like scheduled sales for diversification or payroll withholding — without triggering forced disgorgement, so such planned trades are treated differently from opportunistic insider trading.

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^*

Clevenger Marvin Bradford

(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)
	President, Rocket Lab USA, Inc

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		411⁽¹⁾	D	$139.4122⁽²⁾	492,613⁽³⁾	D
Common Stock	05/26/2026		S		1,222⁽¹⁾	D	$140.2017⁽⁴⁾	491,391	D
Common Stock	05/26/2026		S		1,519⁽¹⁾	D	$141.4563⁽⁵⁾	489,872	D
Common Stock	05/26/2026		S		4,524⁽¹⁾	D	$142.355⁽⁶⁾	485,348	D
Common Stock	05/26/2026		S		6,055⁽¹⁾	D	$143.2433⁽⁷⁾	479,293	D
Common Stock	05/26/2026		S		1,818⁽¹⁾	D	$144.1287⁽⁸⁾	477,475	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 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. Includes 589 shares acquired under the Rocket Lab Corporation 2021 Employee Stock Purchase Plan in transactions that were exempt under both Rule 16b-3(d) and Rule 16b-3(c).

4. 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.

5. 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.

6. 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.

7. 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.

8. 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.

	By: /s/ Arjun Kampani, as Attorney-in-Fact For: Marvin B. Clevenger	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 Marvin Bradford Clevenger?

Rocket Lab reported that executive Marvin Bradford Clevenger sold 15,549 shares of common stock. The Form 4 shows multiple open-market transactions on May 26, 2026, executed as part of a sell-to-cover arrangement related to tax withholding on vested restricted stock units.

Why did Rocket Lab (RKLB) executive Marvin Bradford Clevenger sell 15,549 shares?

The shares were sold under a sell-to-cover arrangement to pay tax withholding obligations. The filing explains the sales related to the vesting and settlement of previously granted restricted stock units, indicating a tax-driven transaction rather than a discretionary portfolio sale.

At what prices were the Rocket Lab (RKLB) shares sold by Marvin Bradford Clevenger?

The reported weighted-average sale prices ranged roughly from the high $130s to mid $140s per share. Individual Form 4 line items show prices such as 139.4122 and 144.1287 per share, with footnotes detailing ranges for each transaction grouping.

How many separate sale transactions did the Rocket Lab (RKLB) Form 4 disclose?

The Form 4 discloses six separate open-market sale transactions. All six involved Rocket Lab common stock on May 26, 2026, and together they totaled 15,549 shares sold to cover tax withholding tied to restricted stock unit vesting.