[Form 4] Rocket Lab Corp Insider Trading Activity

Rhea-AI Filing Summary

Adam C. Spice, Rocket Lab Corp (RKLB) Chief Financial Officer, reported option exercises and share sales in mid-September 2025. On 09/18/2025 Mr. Spice exercised an employee stock option with a $1.09 exercise price covering 1,867,496 shares, triggering acquisition of those common shares. The filing reports a subsequent "sell-to-cover" disposition on 09/19/2025 of 862,588 shares at a weighted-average price of $47.9941 and an additional sale of 12,000 shares at a weighted-average price of $48.8484 to satisfy the exercise cost and tax withholding. After these transactions, the reporting person beneficially owned 3,254,155 shares including 1,867,496 underlying the exercised option and 2,057,889 shares held directly following the final sale.

Insights

Financial Analyst

TL;DR: CFO exercised long-dated options at $1.09 and sold a portion to cover costs, leaving substantial post-transaction ownership.

The exercise of 1,867,496 options with a $1.09 strike reflects long-term compensation vesting; the immediate sell-to-cover of 874,588 shares (aggregate) at ~ $48 per share is a routine tax-coverage disposition and reduces direct share count but leaves the CFO with 3,254,155 shares beneficially owned. This transaction is not an issuance or secondary financing event for the company; it is a personal liquidity action following option exercise and therefore has limited direct corporate financial impact. Investors may note insider liquidity but should treat this as routine compensation-related activity.

Corporate Governance Expert

TL;DR: Transaction is a standard, disclosed officer exercise and sell-to-cover; compliance and disclosure appear complete.

The Form 4 discloses option grant details (original grant date August 3, 2018) and vesting schedule, exercise date, and weighted-average sale prices for shares sold to cover exercise and tax obligations. The filing includes an attorney-in-fact signature and explanatory footnotes describing the multi-trade weightings. From a governance and disclosure perspective, the form supplies the required particulars and footnote undertakings to furnish per-trade pricing on request, indicating adherence to reporting norms. No governance red flags or unusual concealment are evident in the document itself.

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).

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^*

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)
09/18/2025

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	09/18/2025		M		1,867,496	A	$1.09	2,932,477	D
Common Stock	09/19/2025		S		862,588(1)	D	$47.9941(2)	2,069,889	D
Common Stock	09/19/2025		S		12,000(1)	D	$48.8484(3)	2,057,889	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
Employee Stock Option (right to buy)	$1.09	09/18/2025		M			1,867,496	(4)	08/03/2028	Common Stock	1,867,496	$0.0	3,254,155	D

Explanation of Responses:

1. Represents the sale of shares pursuant to a "sell-to-cover" transaction, with shares sold to cover the exercise price and satisfy applicable tax withholding obligations in connection with the exercise of stock options previously granted to the reporting person.

2. The price reported in column 4 is a weighted average price of the aggregate number of shares. These shares were sold in multiple transactions in bulk at prices ranging from $47.7100 to $48.7000, 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 of the aggregate number of shares. These shares were sold in multiple transactions in bulk at prices ranging from $48.7100 to $48.9300, 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 stock option was granted on August 3, 2018, and had a vesting commencement date of May 25, 2018. 1/4 of the shares subject to the stock option vest on the one year anniversary of the vesting commencement date, and 1/48 of the shares subject to the stock option vest on a monthly basis each month thereafter, subject, in each case, to the reporting person's continued service relationship through each applicable vesting date.

	By: /s/ Arjun Kampani, as Attorney-in-Fact For: Adam C. Spice	09/22/2025
	** Signature of Reporting Person	Date
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