Rocket Lab officer plans sale of 81,250 shares

Rocket Lab Corp (RKLB) reports that officer Frank Klein plans to sell Rocket Lab common stock under Rule 144.

Rhea-AI Filing Summary

Rocket Lab Corp (RKLB) reports that officer Frank Klein plans to sell Rocket Lab common stock under Rule 144. The planned sale relates to 81,250 shares from restricted stock vesting expected on 08/22/2026, with sales to be executed through Morgan Stanley Smith Barney LLC Executive Services on NASDAQ. A portion of the sale is intended to cover a tax obligation from the vested equity award distribution. In the past three months, Klein sold 36,860 shares on 05/28/2026 and 44,390 shares on 05/26/2026.

Key Figures

Planned shares to be sold from restricted stock vesting: 81,250 shares Aggregate market value for planned sale: 3,181,172.49 Shares outstanding: 598,459,739 shares +4 more

7 metrics

Planned shares to be sold from restricted stock vesting 81,250 shares Securities To Be Sold section, related to vesting on 08/22/2026

Aggregate market value for planned sale 3,181,172.49 Listed with Morgan Stanley Smith Barney LLC Executive Services for common stock

Shares outstanding 598,459,739 shares Rocket Lab Corp common stock outstanding as referenced in the securities information

Shares sold on 05/28/2026 36,860 shares Securities sold during the past 3 months by Frank Klein

Aggregate proceeds on 05/28/2026 sale 5,537,477.80 Common stock sale by Frank Klein

Shares sold on 05/26/2026 44,390 shares Securities sold during the past 3 months by Frank Klein

Aggregate proceeds on 05/26/2026 sale 6,328,838.33 Common stock sale by Frank Klein

Key Terms

Rule 144, restricted stock vesting, aggregate market value, Attorney-in-Fact

4 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

restricted stock vesting financial

"Common | 08/22/2026 | Restricted Stock Vesting | Issuer"

Restricted stock vesting is the timetable and conditions under which shares granted to employees or insiders become fully owned and can be sold, typically requiring continued work or meeting performance goals. It matters to investors because large blocks of shares can become tradable at once, which can change share supply and price, and because vesting aligns insiders’ incentives with the company’s long‑term performance—think of it like a timed unlock that both rewards and locks in key people.

aggregate market value financial

"| 45692 | 3181172.49 | 598459739 | 08/24/2026 |"

Aggregate market value is the combined price you would pay to buy all outstanding shares of a company or all companies in a group at current market prices — essentially the sum of each stock’s market capitalization. It matters to investors because it shows the overall size and weight of an investment or sector (like the total cost to buy every piece of a puzzle), helps compare scale across companies or markets, and influences index composition and risk exposure.

Attorney-in-Fact regulatory

"Signature | /s/ Arjun Kampani, as Attorney-in-Fact for Frank Klein"

An attorney-in-fact is the person or entity given legal authority through a power of attorney to act on behalf of another for specific tasks, such as signing documents, voting shares, or handling transactions. For investors, this matters because it lets a trusted representative make timely decisions or complete paperwork when the owner cannot, much like handing keys to someone to run errands on your behalf—so checks on scope and limits of that authority are important.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction does Rocket Lab Corp (RKLB) disclose for Frank Klein?

Rocket Lab Corp discloses that officer Frank Klein plans to sell 81,250 shares of Rocket Lab common stock related to restricted stock vesting expected on 08/22/2026, with a portion of the sale intended to cover a tax obligation from the vested equity award distribution.

When is the planned Rule 144 sale for RKLB shares expected to occur?

The planned Rule 144 sale of Rocket Lab Corp (RKLB) common stock for Frank Klein is tied to 08/22/2026, the date associated with the restricted stock vesting from which the 81,250 shares are to be sold.

How many RKLB shares has Frank Klein sold in the past three months?

In the past three months, Frank Klein sold 36,860 shares of Rocket Lab common stock on 05/28/2026 and 44,390 shares on 05/26/2026, according to the disclosed Rule 144 information.

What broker is handling Frank Klein’s planned sale of RKLB shares?

The planned sale of Frank Klein’s Rocket Lab Corp (RKLB) common shares is to be handled by Morgan Stanley Smith Barney LLC Executive Services, with the shares to be sold on NASDAQ as stated.

What is the purpose of part of Frank Klein’s planned RKLB share sale?

The remarks state that the sale includes an amount necessary to cover a tax obligation arising from the settlement of a vested equity award distribution related to Rocket Lab Corp (RKLB) shares.

What aggregate market value is reported for the planned RKLB share sale?

The disclosure lists an aggregate market value of 3,181,172.49 for Rocket Lab Corp common stock in connection with the planned Rule 144 sale through Morgan Stanley Smith Barney LLC Executive Services.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 08/24/2026 - 09:05 PM EDT Accepted by SEC EDGAR 08/24/2026 - 09:05 PM EDT Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0002037530
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	Rocket Lab Corp
SEC File Number	001-39560
Address of Issuer	3881 MCGOWEN STREET LONG BEACH CALIFORNIA 90808
Phone	714-465-5737
Name of Person for Whose Account the Securities are To Be Sold	Klein Frank
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	MORGAN STANLEY SMITH BARNEY LLC EXECUTIVE SERVICES 200 W CIVIC CENTER DR. 4TH FLOOR SANDY UT 84070	45692	3181172.49	598459739	08/24/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	08/22/2026	Restricted Stock Vesting	Issuer			81250	08/22/2026	Compensation

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
FRANK KLEIN 3881 McGowen Street Long Beach CA 90808	Common	05/28/2026	36860	5537477.80
FRANK KLEIN 3881 McGowen Street Long Beach CA 90808	Common	05/26/2026	44390	6328838.33

144: Remarks and Signature

Remarks	Sale includes an amount necessary to cover a tax obligation resulting from the settlement of a vested equity award distribution.
Date of Notice	08/24/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	09/19/2025
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Arjun Kampani, as Attorney-in-Fact for Frank Klein
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)