Rocket Lab (RKLB) COO offloads 35,558 shares via 10b5-1 plan

Rhea-AI Filing Summary

Rocket Lab Corp (RKLB) reported that Chief Operations Officer Frank Klein sold a total of 35,558 shares of common stock on August 27, 2026, in three open-market transactions at weighted-average prices of $66.2510, $66.8576, and $67.5387. All sales were made pursuant to a Rule 10b5-1 trading plan adopted on September 19, 2025, and were executed in multiple trades within disclosed price ranges.

Insider Trade Summary 10b5-1

Net Seller: 35,558 shares

Net Sell 3 txns

Insider Klein Frank

Role Chief Operations Officer

Sold 35,558 shs ($2.37M)

Type	Security	Shares	Price	Value
Sale	Common Stock F1, F2	15,300	$66.251	$1.01M
Sale	Common Stock F1, F3	19,800	$66.8576	$1.32M
Sale	Common Stock F1, F4	458	$67.5387	$31K

Holdings After Transaction: Common Stock — 925,737 shares (Direct)

Footnotes (4)

1. F1. Represents the sale of shares which occurred automatically pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 19, 2025.
2. F2. The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $65.5300 to $66.5200. 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. F3. The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $66.5300 to $67.5200. 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.
4. F4. The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $67.5300 to $67.5400. 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.

Key Figures

Shares sold (total): 35,558 shares Shares sold: 15,300 shares Weighted-average price: $66.2510 per share +5 more

8 metrics

Shares sold (total) 35,558 shares Aggregate non-derivative sales on August 27, 2026

Shares sold 15,300 shares Common Stock sale at $66.2510 on August 27, 2026

Weighted-average price $66.2510 per share First reported sale of 15,300 shares

Shares sold 19,800 shares Common Stock sale at $66.8576 on August 27, 2026

Weighted-average price $66.8576 per share Second reported sale of 19,800 shares

Shares sold 458 shares Common Stock sale at $67.5387 on August 27, 2026

Weighted-average price $67.5387 per share Third reported sale of 458 shares

Rule 10b5-1 plan adoption date September 19, 2025 Date Frank Klein adopted the trading plan governing these sales

Key Terms

Rule 10b5-1 trading plan, weighted-average price, open market or private transaction, non-derivative

4 terms

Rule 10b5-1 trading plan regulatory

"Represents the sale of shares which occurred automatically pursuant to a Rule 10b5-1"

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

weighted-average price financial

"The price reported in Column 4 is a weighted-average price."

Weighted-average price is the average of multiple prices where each price is counted according to its size or importance—larger trades carry more weight than smaller ones, like averaging course grades by credit hours. It matters to investors because it gives a more realistic picture of the true price paid or received, helping assess trade execution, compare performance, calculate cost basis, and value positions more accurately than a simple average.

open market or private transaction financial

"transaction_code_description": "Sale in open market or private transaction""

non-derivative financial

"transaction_type": "non-derivative""

FAQ

What insider transaction did RKLB disclose for Frank Klein?

RKLB disclosed that Chief Operations Officer Frank Klein sold 35,558 shares of Rocket Lab common stock on August 27, 2026 in three open-market transactions at reported weighted-average prices between $66.2510 and $67.5387.

Were Frank Klein’s RKLB stock sales under a Rule 10b5-1 plan?

Yes. The filing states that the reported sales were executed automatically pursuant to a Rule 10b5-1 trading plan adopted by Frank Klein on September 19, 2025.

How many RKLB shares did Frank Klein sell in each transaction?

Frank Klein sold 15,300 shares at a weighted-average price of $66.2510, 19,800 shares at $66.8576, and 458 shares at $67.5387, all on August 27, 2026.

What price ranges applied to Frank Klein’s RKLB share sales?

The filing notes the weighted-average prices reflect multiple trades: $65.5300–$66.5200 for the 15,300-share sale, $66.5300–$67.5200 for the 19,800-share sale, and $67.5300–$67.5400 for the 458-share sale.

Does the filing state Frank Klein’s RKLB holdings after these sales?

No. For each reported transaction, the total shares following the transaction field is shown as null, so the filing does not state Frank Klein’s remaining Rocket Lab share holdings.

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

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 08/28/2026 - 06:07 PM Accepted by SEC EDGAR 08/28/2026 - 06:06 PM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

X

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Klein Frank

(Last) (First) (Middle)

3881 MCGOWEN STREET

(Street)

LONG BEACH CALIFORNIA 90808

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Rocket Lab Corp [ RKLB ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Operations Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/27/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

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	08/27/2026		S		15,300(1)	D	$66.251(2)	945,995	D
Common Stock	08/27/2026		S		19,800(1)	D	$66.8576(3)	926,195	D
Common Stock	08/27/2026		S		458(1)	D	$67.5387(4)	925,737	D

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 Securities Underlying Derivative Security (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: 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

Explanation of Responses:

1. Represents the sale of shares which occurred automatically pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 19, 2025.

2. The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $65.5300 to $66.5200. 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. The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $66.5300 to $67.5200. 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.

4. The price reported in Column 4 is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $67.5300 to $67.5400. 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.

	By: /s/Arjun Kampani, as Attorney-in-Fact For: Frank Klein	08/28/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* 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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)