[Form 4] Rocket Lab Corporation Insider Trading Activity

Rhea-AI Filing Summary

Merline Saintil, a director of Rocket Lab Corporation (RKLB), was granted 3,960 restricted stock units (RSUs) on 08/27/2025. The RSUs were issued under the company's non-employee director compensation policy and 2021 Stock Option and Incentive Plan and will vest in full on the earlier of the issuer's next Annual Meeting of Stockholders or the one-year anniversary of the grant, subject to the reporting persons continued board service. Following the reported grant, the filing shows the reporting person beneficially owns 423,529 shares in a direct ownership form. The Form 4 was executed by an attorney-in-fact for Merline Saintil on 08/29/2025.

Positive

• Grant of 3,960 RSUs to a non-employee director is explicitly disclosed.
• Post-grant direct beneficial ownership of 423,529 shares is reported.
• Vesting terms are clear: vesting in full on earlier of next annual meeting or one-year anniversary, subject to continued service.

Negative

• None.

Insights

Financial Analyst

TL;DR: Routine director equity grant of 3,960 RSUs increases direct beneficial ownership to 423,529 shares.

The Form 4 documents a non-derivative equity award to a board member under standard director compensation plans. The grant size (3,960 RSUs) and the described vesting — earlier of next annual meeting or one year from grant, conditioned on continued service — are typical mechanisms to align director incentives with shareholder interests. This disclosure is a standard Section 16 filing and does not include cash amounts or derivative instruments.

Corporate Governance Expert

TL;DR: Compensation appears standard for non-employee directors with time-based vesting; disclosure is complete for the grant described.

The filing specifies plan authorities for the RSUs and a clear vesting condition tied to continued board service and a near-term corporate milestone (the next annual meeting). The Form 4 indicates direct beneficial ownership post-grant, and the signature was provided via attorney-in-fact. No additional governance actions or amendments are disclosed in this filing.

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
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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^*

Saintil Merline

(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)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
08/27/2025

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	08/27/2025		A		3,960(1)	A	$0.0	423,529	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 restricted stock units ("RSUs") granted to the Reporting Person under the Rocket Lab Corporation Amended and Restated Non-Employee Director Compensation Policy, and the Rocket Lab Corporation 2021 Stock Option and Incentive Plan. Such RSUs will vest in full on the earlier of (i) the date of the Issuer's next Annual Meeting of Stockholders and (ii) the one-year anniversary of the date of grant, subject to the Reporting Person's continuous service as a member of the Board of Directors through such date.

	By: /s/ Arjun Kampani as Attorney-in-Fact For: Merline Saintil	08/29/2025
	** 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 Merline Saintil report on the Form 4 for RKLB?

The Form 4 reports a grant of 3,960 restricted stock units (RSUs) to Merline Saintil, a director of Rocket Lab Corporation (RKLB).

When was the RSU transaction for RKLB reported and executed?

The transaction date is 08/27/2025 and the Form 4 was signed by an attorney-in-fact on 08/29/2025.

How many shares does Merline Saintil beneficially own after the reported transaction?

Following the reported grant, the filing shows 423,529 shares beneficially owned in direct form.

Under what plans were the RSUs for RKLB granted?

The RSUs were granted under the Rocket Lab Corporation Amended and Restated Non-Employee Director Compensation Policy and the 2021 Stock Option and Incentive Plan.

What are the vesting conditions for the RSUs reported on the Form 4?

The RSUs will vest in full on the earlier of (i) the issuer's next Annual Meeting of Stockholders and (ii) the one-year anniversary of the grant date, subject to continuous board service through such date.