FORM 4 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 that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES 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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(Print or Type Responses)

1. Name and Address of Reporting Person * Beck Peter 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 __X__ Officer (give title below) _____ Other (specify below) CEO (Last) (First) (Middle) 3881 MCGOWEN STREET 3. Date of Earliest Transaction (Month/Day/Year) 12/15/2025 (Street) LONG BEACH, CA 90808 4. If Amendment, Date 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 (City) (State) (Zip) 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 12/15/2025 S 317,989(1) D $55.6411(2) 2,182,011 I by Trust(3) Common Stock 12/15/2025 S 537,294(1) D $56.6163(4) 1,644,717 I by Trust(3) Common Stock 12/15/2025 S 373,108(1) D $57.6255(5) 1,271,609 I by Trust(3) Common Stock 12/15/2025 S 129,550(1) D $58.3904(6) 1,142,059 I by Trust(3) Common Stock 12/15/2025 S 34,302(1) D $59.7217(7) 1,107,757 I by Trust(3) Common Stock 12/15/2025 S 50,483(1) D $60.4885(8) 1,057,274 I by Trust(3) Common Stock 12/15/2025 S 19,519(1) D $61.4917(9) 1,037,755 I by Trust(3) Common Stock 12/15/2025 S 46,952(1) D $62.7733(10) 990,803 I by Trust(3) Common Stock 12/15/2025 S 43,052(1) D $63.4783(11) 947,751 I by Trust(3) Common Stock 12/15/2025 S 8,005(1) D $64.3144(12) 939,746 I by Trust(3) Common Stock 12/16/2025 S 190,345(1) D $53.2081(13) 749,401 I by Trust(3) Common Stock 12/16/2025 S 222,349(1) D $54.3052(14) 527,052 I by Trust(3) Common Stock 12/16/2025 S 335,510(1) D $55.1409(15) 191,542 I by Trust(3) Common Stock 12/16/2025 S 191,542(1) D $56.0044(16) 0 I by Trust(3) Common Stock 902,942 D

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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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 Underlying Securities (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 of Derivative Security: 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

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Beck Peter 3881 MCGOWEN STREET LONG BEACH, CA 90808	X		CEO

Signatures

By: /s/Arjun Kampani, as Attorney-in-Fact For: Peter Beck		12/16/2025
**Signature of Reporting Person		Date

Explanation of Responses:

*	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).
(1)	Represents the sale of shares which occurred automatically pursuant to a Rule 10b5-1 trading plan adopted by the Equatorial Trust (the "Trust") on June 13, 2025.
(2)	The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $55.1100 to $56.1050. 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)	These shares are held directly by the Trust, a family trust settled by Peter Beck and Kerryn Beck. Peek Street Equatorial Trustee Limited (the "Trustee") is the trustee of the Trust and each of Peter Beck, Kerryn Beck and Warren Butler serve as a director of the Trustee with shared voting and investment control of the shares and, as a result, the Trustee and each such individual is deemed to be an indirect beneficial owner of these shares. Each Reporting Person disclaims beneficial ownership of these shares, except to the extent, if any, of his, her or its pecuniary interest therein, and the filing of this Form 4 is not an admission that any Reporting Person is the beneficial owner of these shares.
(4)	The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $56.1100 to $57.1050. 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 $57.1100 to $58.1050. 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 $58.1100 to $59.1000. 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 $59.1100 to $60.1000. 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 $60.1100 to $61.1050. 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.
(9)	The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $61.1100 to $62.1000. 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.
(10)	The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $62.1100 to $63.1000. 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.
(11)	The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $63.1100 to $64.1050. 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.
(12)	The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $64.1100 to $64.5250. 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.
(13)	The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $52.6800 to $53.6700. 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.
(14)	The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $53.6800 to $54.6750. 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.
(15)	The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $54.6800 to $55.6750. 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.
(16)	The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $55.6800 to $56.5900. 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.

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