[Form 4] Rocket Lab Corporation Insider Trading Activity

Rhea-AI Filing Summary

Rocket Lab director Nina Armagno was granted 3,960 restricted stock units (RSUs) on 08/27/2025 under the company’s non-employee director compensation policy and 2021 incentive plan. The RSUs were reported at a $0.0 price and increase her beneficial ownership to 136,254 shares following the grant. The RSUs vest in full on the earlier of the issuer’s next annual meeting or the one-year anniversary of the grant, provided she remains in continuous service as a board member through the vesting date. The Form 4 was executed by an attorney-in-fact on behalf of Ms. Armagno on 08/29/2025.

Positive

• 3,960 RSUs granted to a director under the company’s established compensation policy, indicating adherence to board pay practices
• Beneficial ownership reported after the grant: 136,254 shares, improving transparency of insider holdings
• Clear vesting terms: vesting on earlier of next annual meeting or one-year anniversary, conditional on continuous service

Negative

• None.

Insights

Corporate Governance Expert

TL;DR: A routine director equity grant aligns pay with shareholder interests and follows company compensation policies.

The filing documents a standard RSU award to a non-employee director under Rocket Lab’s established compensation plan. The award size (3,960 RSUs) and vesting tied to continued service and the next annual meeting are typical governance practices to retain directors and align their interests with shareholders. There is no disclosure here of any accelerated vesting, related-party transaction beyond standard director status, or special provisions; the transaction appears procedural and policy-compliant.

Securities Analyst

TL;DR: Small incremental equity grant reported; increases reported beneficial ownership to 136,254 shares.

The Form 4 shows a non-cash award of 3,960 RSUs reported at $0.0, which raises the reporting person’s total beneficial ownership to 136,254 shares. The instrument and vesting terms are clearly stated; there are no derivative instruments or exercised options disclosed in this filing. From a disclosure standpoint, the submission is complete and consistent 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

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^*

Armagno Nina

(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	136,254	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: Nina Armagno	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 Nina Armagno report on the RKLB Form 4?

The Form 4 reports a grant of 3,960 restricted stock units (RSUs) to Nina Armagno on 08/27/2025, increasing her beneficial ownership to 136,254 shares.

When do the RSUs granted to Nina Armagno vest?

The RSUs 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 continuous board service.

What price was reported for the RSU grant on the Form 4 for RKLB?

The transaction is reported with a $0.0 price, consistent with equity awards issued as compensation rather than purchased shares.

Who signed the Form 4 reporting Nina Armagno’s transaction?

The Form 4 was signed by Arjun Kampani, as Attorney-in-Fact for Nina Armagno on 08/29/2025.

Are there any derivative securities listed in this Form 4 for RKLB?

No. Table II for derivative securities contains no entries; only the non-derivative RSU grant is reported.