Rivian CFO sells $128K in stock under 10b5-1 plan

Rivian Automotive, Inc. (RIVN) reported that Chief Financial Officer Claire McDonough sold 8,023 shares of Class A Common Stock on August 20, 2026 at $16.00 per share.

Rhea-AI Filing Summary

Rivian Automotive, Inc. (RIVN) reported that Chief Financial Officer Claire McDonough sold 8,023 shares of Class A Common Stock on August 20, 2026 at $16.00 per share. After this sale, she directly holds 819,178 shares. The sale was executed under a Rule 10b5-1 trading plan adopted on September 2, 2025.

Insider Trade Summary 10b5-1

Net Seller: 8,023 shares

Net Sell 1 txn

Insider McDonough Claire

Role Chief Financial Officer

Sold 8,023 shs ($128K)

Type	Security	Shares	Price	Value
Sale	Class A Common Stock F1	8,023	$16.00	$128K

Holdings After Transaction: Class A Common Stock — 819,178 shares (Direct)

Footnotes (1)

1. F1. The sale reported in this transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 2, 2025, as described in the Issuer's Quarterly Report on Form 10-Q for the three months ended September 30, 2025, filed with the Securities and Exchange Commission on November 4, 2025.

Key Figures

Shares sold: 8,023 shares Sale price per share: $16.00 per share Approximate transaction value: $128,368 +2 more

5 metrics

Shares sold 8,023 shares Class A Common Stock sold on August 20, 2026

Sale price per share $16.00 per share Price for the August 20, 2026 sale

Approximate transaction value $128,368 8,023 shares sold at $16.00 per share

Shares owned after transaction 819,178 shares Direct holdings of Claire McDonough following the sale

Rule 10b5-1 plan adoption date September 2, 2025 Plan under which the reported sale was effected

Key Terms

Rule 10b5-1 trading plan, Class A Common Stock, Form 10-Q

3 terms

Rule 10b5-1 trading plan regulatory

"The sale reported in this transaction was effected pursuant to a Rule 10b5-1 trading plan"

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.

Class A Common Stock financial

"security_title: "Class A Common Stock""

Class A common stock is a category of a company’s shares that carries a specific set of ownership rights—most commonly defined voting power and claims on dividends—set out in the company’s charter. For investors it matters because the class determines how much influence you have over corporate decisions, the share’s likely dividend and trading behavior, and how it compares in value to other share classes, like choosing a particular seat with different privileges at the company’s decision-making table.

Form 10-Q regulatory

"as described in the Issuer's Quarterly Report on Form 10-Q for the three months ended"

A Form 10-Q is a detailed report that publicly traded companies are required to file with regulators three times a year, providing an update on their financial health and business activities. It is important for investors because it offers timely insights into a company's performance, helping them make informed decisions about buying or selling stocks. Think of it as a regular check-up report that shows how well a company is doing.

FAQ

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

What insider transaction did Rivian Automotive (RIVN) disclose for Claire McDonough?

Rivian Automotive (RIVN) disclosed that Chief Financial Officer Claire McDonough sold 8,023 shares of Class A Common Stock on August 20, 2026 at a price of $16.00 per share, in a reported open-market or private transaction.

How many Rivian (RIVN) shares does Claire McDonough hold after the reported sale?

After the reported sale, Claire McDonough directly holds 819,178 shares of Rivian Automotive Class A Common Stock. This share count is reported as her direct ownership immediately following the August 20, 2026 transaction.

Was the Rivian (RIVN) insider sale by Claire McDonough under a Rule 10b5-1 plan?

Yes. The filing states the sale was effected under a Rule 10b5-1 trading plan adopted by Claire McDonough on September 2, 2025, as described in Rivian’s Quarterly Report on Form 10-Q for the three months ended September 30, 2025.

What was the total dollar value of Claire McDonough’s Rivian (RIVN) share sale?

Based on the reported sale of 8,023 shares at $16.00 per share, the transaction value is approximately $128,368. This is calculated directly from the share count and per-share price disclosed in the filing.

What transaction code was used for the Rivian (RIVN) insider sale by Claire McDonough?

The transaction used code “S”, which the filing describes as a “Sale in open market or private transaction”. It applies to the August 20, 2026 sale of 8,023 shares at $16.00 per share.

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

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Available on EDGAR 08/21/2026 - 09:24 PM EDT Accepted by SEC EDGAR 08/21/2026 - 09:24 PM EDT 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^*

McDonough Claire

(Last) (First) (Middle)

C/O RIVIAN AUTOMOTIVE, INC.

14600 MYFORD ROAD

(Street)

IRVINE CALIFORNIA 92606

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Rivian Automotive, Inc. / DE [ RIVN ]

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/20/2026

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
Class A Common Stock	08/20/2026		S(1)		8,023	D	$16	819,178	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. The sale reported in this transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 2, 2025, as described in the Issuer's Quarterly Report on Form 10-Q for the three months ended September 30, 2025, filed with the Securities and Exchange Commission on November 4, 2025.

Remarks:

	/s/ Jamie Chung, Attorney-in-Fact	08/21/2026
	** 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)