Matthew Ocko - 16 Sep 2025 Form 4 Insider Report for Rocket Lab Corp (RKLB)

Reporting relationship: Director
Issuer ticker: RKLB
Reported as of: 16 Sep 2025
Net transaction value: -$90,280,095
SEC form: 4
Accepted by SEC: 18 Sep 2025, 20:28:21 UTC
Prior SEC filing: 18 Jun 2025
Source filing: View source filing
Reporting owner signature: /s/ Matthew Ocko

Key filing fact

Matthew Ocko filed Form 4 for Rocket Lab Corp (RKLB) on 18 Sep 2025.

Key facts

This page summarizes Matthew Ocko's Form 4 filing for Rocket Lab Corp (RKLB).
16 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 18 Sep 2025, 20:28.

Change

Previous filing in this sequence was filed on 18 Jun 2025.
Current net transaction value: -$90,280,095.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001836089 Primary reporting owner

Ocko Matthew

Relationship: Director
Address: C/O ROCKET LAB CORPORATION, 3881 MCGOWEN STREET, LONG BEACH
Signature: /s/ Matthew Ocko
Signature date: 18 Sep 2025

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

RKLB transaction

Common Stock

Sale

Transaction value: $14,392,291
Shares: -303,076
Change %: -28%
Price: $47.49
Shares after: 779,977
Date: 16 Sep 2025
Ownership: See Footnote
Footnotes: F1, F2

RKLB transaction

Common Stock

Sale

Transaction value: $35,389,462
Shares: -745,239
Change %: -28%
Price: $47.49
Shares after: 1,917,900
Date: 16 Sep 2025
Ownership: See Footnote
Footnotes: F1, F3

RKLB transaction

Common Stock

Sale

Transaction value: $6,740,463
Shares: -138,901
Change %: -18%
Price: $48.53
Shares after: 641,076
Date: 16 Sep 2025
Ownership: See Footnote
Footnotes: F2, F4

RKLB transaction

Common Stock

Sale

Transaction value: $16,574,188
Shares: -341,545
Change %: -18%
Price: $48.53
Shares after: 1,576,355
Date: 16 Sep 2025
Ownership: See Footnote
Footnotes: F3, F4

RKLB transaction

Common Stock

Sale

Transaction value: $3,319,030
Shares: -67,409
Change %: -11%
Price: $49.24
Shares after: 573,667
Date: 16 Sep 2025
Ownership: See Footnote
Footnotes: F2, F5

RKLB transaction

Common Stock

Sale

Transaction value: $8,161,214
Shares: -165,753
Change %: -11%
Price: $49.24
Shares after: 1,410,602
Date: 16 Sep 2025
Ownership: See Footnote
Footnotes: F3, F5

RKLB transaction

Common Stock

Sale

Transaction value: $652,809
Shares: -12,993
Change %: -2.3%
Price: $50.24
Shares after: 560,674
Date: 16 Sep 2025
Ownership: See Footnote
Footnotes: F2, F6

RKLB transaction

Common Stock

Sale

Transaction value: $1,605,167
Shares: -31,948
Change %: -2.3%
Price: $50.24
Shares after: 1,378,654
Date: 16 Sep 2025
Ownership: See Footnote
Footnotes: F3, F6

RKLB transaction

Common Stock

Sale

Transaction value: $466,084
Shares: -9,000
Change %: -1.6%
Price: $51.79
Shares after: 551,674
Date: 16 Sep 2025
Ownership: See Footnote
Footnotes: F2, F7

RKLB transaction

Common Stock

Sale

Transaction value: $1,146,049
Shares: -22,130
Change %: -1.6%
Price: $51.79
Shares after: 1,356,524
Date: 16 Sep 2025
Ownership: See Footnote
Footnotes: F3, F7

RKLB transaction

Common Stock

Sale

Transaction value: $530,004
Shares: -10,148
Change %: -1.8%
Price: $52.23
Shares after: 541,526
Date: 16 Sep 2025
Ownership: See Footnote
Footnotes: F2, F8

RKLB transaction

Common Stock

Sale

Transaction value: $1,303,335
Shares: -24,955
Change %: -1.8%
Price: $52.23
Shares after: 1,331,569
Date: 16 Sep 2025
Ownership: See Footnote
Footnotes: F3, F8

RKLB transaction

Common Stock

Other

Transaction value: $0
Shares: -541,526
Change %: -100%
Price: $0.000000
Shares after: 0
Date: 16 Sep 2025
Ownership: See Footnote
Footnotes: F2, F9

RKLB transaction

Common Stock

Other

Transaction value: $0
Shares: -1,331,569
Change %: -100%
Price: $0.000000
Shares after: 0
Date: 16 Sep 2025
Ownership: See Footnote
Footnotes: F3, F10

RKLB transaction

Common Stock

Other

Transaction value: $0
Shares: -9,894
Change %: -50%
Price: $0.000000
Shares after: 9,894
Date: 16 Sep 2025
Ownership: Three Kingdoms Capital Partners, LP
Footnotes: F11, F12

RKLB transaction

Common Stock

Other

Transaction value: $0
Shares: -164,026
Change %: -50%
Price: $0.000000
Shares after: 164,026
Date: 16 Sep 2025
Ownership: SST Capital Management, LLC
Footnotes: F13, F14

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 14 footnotes

Footnote F1

The price reported in column 4 is a weighted average price of the aggregate number of shares sold. These shares were sold in multiple transactions at prices ranging from $47.013 to $48.01, inclusive. The Reporting Person undertakes to provide to Rocket Lab Corporation (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 ranges set forth in this footnote.

Footnote F2

Represents securities held of record by Data Collective IV, L.P. ("DCVC IV"). Data Collective IV GP, LLC ("DCVC IV GP") is the general partner of DCVC IV and has sole voting and dispositive power with regard to the securities held by DCVC IV. The Reporting Person is a managing member of DCVC IV GP and shares voting and dispositive power with respect to the securities held by DCVC IV. The Reporting Person disclaims the existence of a "group" and disclaims beneficial ownership of such securities and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of his indirect pecuniary interest therein, if any.

Footnote F3

Represents securities held of record by DCVC Opportunity Fund II, L.P. ("DCVC Opportunity Fund II"). DCVC Opportunity Fund II GP, LLC ("DCVC Opportunity Fund II GP") is the general partner of DCVC Opportunity Fund II and has sole voting and dispositive power with regard to the securities held by DCVC Opportunity Fund II. The Reporting Person is a managing member of DCVC Opportunity Fund II GP and shares voting and dispositive power with respect to the securities held by DCVC Opportunity Fund II. The Reporting Person disclaims the existence of a "group" and disclaims beneficial ownership of such securities and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of his indirect pecuniary interest therein, if any.

Footnote F4

The price reported in column 4 is a weighted average price of the aggregate number of shares sold. These shares were sold in multiple transactions at prices ranging from $48.013 to $49.01, 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 ranges set forth in this footnote.

Footnote F5

The price reported in column 4 is a weighted average price of the aggregate number of shares sold. These shares were sold in multiple transactions at prices ranging from $49.015 to $50.01, 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 ranges set forth in this footnote.

Footnote F6

The price reported in column 4 is a weighted average price of the aggregate number of shares sold. These shares were sold in multiple transactions at prices ranging from $50.02 to $50.398, 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 ranges set forth in this footnote.

Footnote F7

The price reported in column 4 is a weighted average price of the aggregate number of shares sold. These shares were sold in multiple transactions at prices ranging from $51.10 to $52.09, 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 ranges set forth in this footnote.

Footnote F8

The price reported in column 4 is a weighted average price of the aggregate number of shares sold. These shares were sold in multiple transactions at prices ranging from $52.10 to $52.45, 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 ranges set forth in this footnote.

Footnote F9

On September 16, 2025, DCVC IV distributed, for no consideration, 541,526 shares of Common Stock (the "DCVC IV Shares") to its limited partners and to DCVC IV GP, the general partner of DCVC IV, representing each such partner's pro rata interest in such DCVC IV Shares. DCVC IV GP then distributed, for no consideration, the DCVC IV Shares it received in the distribution by DCVC IV to its members, representing each such member's pro rata interest in such DCVC IV Shares.

Footnote F10

On September 16, 2025, DCVC Opportunity Fund II distributed, for no consideration, 1,331,569 shares of Common Stock (the "DCVC Opportunity Fund II Shares") to its limited partners and to DCVC Opportunity Fund II GP, the general partner of DCVC Opportunity Fund II, representing each such partner's pro rata interest in such DCVC Opportunity Fund II Shares. DCVC Opportunity Fund II GP then distributed, for no consideration, the DCVC Opportunity Fund II Shares it received in the distribution by DCVC Opportunity Fund II to its members, representing each such member's pro rata interest in such DCVC Opportunity Fund II Shares.

Footnote F11

Represents shares received by Three Kingdoms Capital Partners, LP pursuant to pro rata distributions by DCVC IV and DCVC Opportunity Fund II, for no consideration, of shares of Common Stock to their respective partners and such partners' members, as applicable.

Footnote F12

The shares are held of record by Three Kingdoms Capital Partners, LP of which the Reporting Person is an indirect member of the general partner. The Reporting Person disclaims the existence of a "group" and disclaims beneficial ownership of these securities except to the extent of his pecuniary interest therein, and the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of the reported securities for purposes of Section 16 or for any other purpose.

Footnote F13

Represents shares received by SST Capital Management, LLC pursuant to pro rata distributions by DCVC IV and DCVC Opportunity Fund II, for no consideration, of shares of Common Stock to their respective partners and such partners' members, as applicable.

Footnote F14

The shares are held of record by SST Capital Management, LLC of which the Reporting Person is a beneficial owner. The Reporting Person disclaims the existence of a "group" and disclaims beneficial ownership of these securities except to the extent of his pecuniary interest therein, and the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of the reported securities for purposes of Section 16 or for any other purpose.