Adam Spice - 18 Sep 2025 Form 4 Insider Report for Rocket Lab Corp (RKLB)

Signature
By: /s/ Arjun Kampani, as Attorney-in-Fact For: Adam C. Spice
Issuer symbol
RKLB
Transactions as of
18 Sep 2025
Transactions value $
-$39,949,745
Form type
4
Date filed
22 Sep 2025, 19:17
Previous filing
18 Sep 2025
Next filing
25 Nov 2025

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Spice Adam C. Chief Financial Officer 3881 MCGOWEN STREET, LONG BEACH By: /s/ Arjun Kampani, as Attorney-in-Fact For: Adam C. Spice 2025-09-22 0001509421

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction RKLB Common Stock Options Exercise $2.04M +1.87M +175.35% $1.09 2.93M 18 Sep 2025 Direct
transaction RKLB Common Stock Sale -$41.4M -863K -29.41% $47.99 2.07M 19 Sep 2025 Direct F1, F2
transaction RKLB Common Stock Sale -$586K -12K -0.58% $48.85 2.06M 19 Sep 2025 Direct F1, F3

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction RKLB Employee Stock Option (right to buy) Options Exercise $0 -1.87M -36.46% $0.00 3.25M 18 Sep 2025 Common Stock 1.87M $1.09 Direct F4
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 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.
F2 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.
F3 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.
F4 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.