[Form 4] Rocket Lab Corp Insider Trading Activity

Rhea-AI Filing Summary

Adam C. Spice, Chief Financial Officer of Rocket Lab Corp (RKLB), reported multiple sales of common stock on 09/16/2025 as shown on Form 4. The transactions are described as "sell-to-cover" sales to satisfy tax withholding on the vesting and settlement of previously granted restricted stock units. The reported disposals were: 12,358 shares at a weighted-average price of $47.785, 31,843 shares at $48.6044, 13,743 shares at $49.4143, 6,686 shares at $50.5206 and 3,624 shares at $51.6341. Following these transactions, the reporting person’s direct beneficial ownership decreased to 1,064,981 shares. The Form 4 was signed on behalf of Mr. Spice by his attorney-in-fact on 09/18/2025.

Insights

Financial Analyst

TL;DR: Routine sell-to-cover transactions by the CFO reduced direct holdings; no new grants or purchases reported.

The Form 4 discloses multiple dispositions totaling 68,254 shares executed on 09/16/2025 through "sell-to-cover" transactions to meet tax withholding from vested restricted stock units. The sales were executed across a range of prices with weighted-average prices disclosed for each lot. This filing documents tax-related liquidity events rather than open-market, discretionary selling, and the reporting person's remaining direct position is 1,064,981 shares.

Corporate Governance Expert

TL;DR: Disclosure is consistent with routine insider tax-withholding activity; filings are complete with price ranges noted.

The Form 4 includes explanatory footnotes stating the disposals were to satisfy tax withholding on RSU vesting. Each reported price is a weighted average with disclosed execution price ranges and an undertaking to provide transaction-level details upon request. The form is signed by an attorney-in-fact, indicating procedural compliance with Section 16 reporting requirements.

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

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person^*

Spice Adam C.

(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)
	Chief Financial Officer

3. Date of Earliest Transaction (Month/Day/Year)
09/16/2025

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	09/16/2025		S		12,358(1)	D	$47.785(2)	1,120,877	D
Common Stock	09/16/2025		S		31,843(1)	D	$48.6044(3)	1,089,034	D
Common Stock	09/16/2025		S		13,743(1)	D	$49.4143(4)	1,075,291	D
Common Stock	09/16/2025		S		6,686(1)	D	$50.5206(5)	1,068,605	D
Common Stock	09/16/2025		S		3,624(1)	D	$51.6341(6)	1,064,981	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 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 $47.1300 to $48.1200, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, 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 $48.1300 to $49.1200, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, 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 $49.1300 to $50.1200, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, 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 $50.1300 to $51.1100, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, 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 $51.1300 to $52.0500, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, 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: Adam C. Spice	09/18/2025
	** 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) CFO Adam C. Spice report on Form 4?

The CFO reported sell-to-cover sales on 09/16/2025 of a total of 68,254 shares related to tax withholding for vested RSUs.

How many shares does Adam C. Spice beneficially own after the transactions?

The Form 4 shows 1,064,981 shares of direct beneficial ownership following the reported sales.

What prices were the shares sold at in the Form 4 filing?

Sales were reported in lots with weighted-average prices: $47.785, $48.6044, $49.4143, $50.5206, and $51.6341.

Why were the shares sold according to the filing?

The filing states the sales were sell-to-cover transactions to satisfy applicable tax withholding obligations on vested restricted stock units.

When were the transactions and when was the Form 4 signed?

Transactions occurred on 09/16/2025 and the Form 4 was signed by an attorney-in-fact for Adam C. Spice on 09/18/2025.