Insider sale notice: proposed resale of 3,500 shares

Issuer submitted a Form 144 reporting proposed resale of 3,500 shares of Common Stock on 05/22/2026 tied to restricted stock vesting under a registered plan.

Rhea-AI Filing Summary

Issuer submitted a Form 144 reporting proposed resale of 3,500 shares of Common Stock on 05/22/2026 tied to restricted stock vesting under a registered plan. The filing also lists prior sales by Marvin Bradford Clevenger of 14,622 shares ($2,084,709.72) and 927 shares ($132,165.63) on 05/22/2026.

Insights

Securities Attorney

Form 144 is a routine notice for proposed resale of restricted shares.

Form 144 records a proposed sale of 3,500 shares related to restricted stock vesting under a registered plan, dated 05/22/2026. It notifies the market and broker-dealers of an intended resale method under applicable rules.

Cash‑flow treatment and actual transaction timing are not stated here; subsequent trade reports would show execution. Future filings or broker reports will confirm whether these proposed sales were completed.

Key Figures

Proposed resale: 3,500 shares Prior sale by reporting person: 14,622 shares Prior sale by reporting person: 927 shares

3 metrics

Proposed resale 3,500 shares proposed sale dated <date>05/22/2026</date> under registered plan

Prior sale by reporting person 14,622 shares sale on <date>05/22/2026</date> valued at <money>$2,084,709.72</money>

Prior sale by reporting person 927 shares sale on <date>05/22/2026</date> valued at <money>$132,165.63</money>

Key Terms

Form 144, restricted stock vesting, registered plan

3 terms

Form 144 regulatory

"proposed resale notice of restricted shares (05/22/2026)"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

restricted stock vesting financial

"Restricted stock vesting under a registered plan"

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.

registered plan regulatory

"vesting under a registered plan used as the resale source"

A registered plan is a savings or investment account that a government recognizes for special tax treatment and rules, such as limits on how much you can put in and conditions for withdrawals. For investors it matters because those rules change how much of your gains are taxed, how quickly your money can be accessed and what strategies make sense — like a labeled jar that gives tax breaks but comes with rules about when and how you can take the money out.

FAQ

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

What does the RKLB Form 144 filing report?

The filing reports a proposed resale of 3,500 shares of Common Stock dated 05/22/2026, from restricted stock vesting under a registered plan. It also lists prior sales by Marvin Bradford Clevenger totaling 15,549 shares on the same date.

Does the Form 144 mean the RKLB shares were sold?

No. Form 144 indicates a proposed resale authorization; it does not confirm a completed trade. Execution and settlement details would appear in later trade reports or broker confirmations if the sale occurred.

Who is the selling party listed in the RKLB excerpt?

The excerpt lists Marvin Bradford Clevenger as the reporting person, with two reported past sales of 14,622 shares ($2,084,709.72) and 927 shares ($132,165.63) on 05/22/2026, and the proposed 3,500-share resale.

What type of shares are covered by the RKLB Form 144?

The filing specifies Common Stock tied to restricted stock vesting under a registered plan, dated 05/22/2026. It identifies the issuer as the source of the vested restricted shares being registered for resale.

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

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Accepted by SEC EDGAR 05/28/2026 - 04:12 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	0002127567
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 CORPORATION
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	MARVIN BRADFORD CLEVENGER
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 Financial Services 1 New York Plaza 8th Floor New York NY 10004	3500	513355.85	578867000	05/28/2026	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	05/22/2026	Restricted stock vesting under a registered plan	Issuer			3500	05/22/2026	Services Rendered

* 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
MARVIN BRADFORD CLEVENGER 3881 McGowen Street Long Beach CA 90808	Common	05/22/2026	14622	2084709.72
MARVIN BRADFORD CLEVENGER 3881 McGowen Street Long Beach CA 90808	Common	05/22/2026	927	132165.63

144: Remarks and Signature

Remarks
Date of Notice	05/28/2026
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/ Marvin Bradford Clevenger
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)