Rivian officer McDonough plans 8,023-share sale

Rivian Automotive, Inc. (RIVN) received a Rule 144 notice from officer Claire R. McDonough covering a proposed sale of 8,023 shares of common stock through Morgan Stanley Smith Barney LLC on or after August 20, 2026.

Rhea-AI Filing Summary

Rivian Automotive, Inc. (RIVN) received a Rule 144 notice from officer Claire R. McDonough covering a proposed sale of 8,023 shares of common stock through Morgan Stanley Smith Barney LLC on or after August 20, 2026. The shares are described as restricted stock acquired from the issuer on August 15, 2026.

The notice also lists McDonough’s prior sales of Rivian common stock during the past three months, including transactions on May 21, May 29, June 3, and August 18, 2026, each for several thousand shares with reported aggregate sale prices.

Key Figures

Proposed shares to be sold: 8,023 shares Aggregate market value of proposed sale: $128,368.00 Shares sold on 08/18/2026: 13,144 shares +4 more

7 metrics

Proposed shares to be sold 8,023 shares Common stock under Rule 144 notice via Morgan Stanley Smith Barney LLC

Aggregate market value of proposed sale $128,368.00 Value reported for 8,023 shares of Rivian common stock

Shares sold on 08/18/2026 13,144 shares Rivian common stock sold with aggregate price $190,649.34

Aggregate sale price on 08/18/2026 $190,649.34 Sale of 13,144 shares of Rivian common stock

Shares sold on 06/03/2026 8,022 shares Rivian common stock sold with aggregate price $144,396.00

Shares sold on 05/29/2026 8,023 shares Rivian common stock sold with aggregate price $128,368.00

Shares sold on 05/21/2026 7,600 shares Rivian common stock sold with aggregate price $106,400.00

Key Terms

Rule 144, Restricted Stock, aggregate sale price

3 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 financial

"Common | 08/15/2026 | Restricted Stock | Issuer"

Shares granted to an individual that carry limits on transfer or sale until certain conditions are met, such as staying with the company for a set time or hitting performance targets. Think of them as a locked gift that gradually opens; for investors they matter because they affect how many shares may enter the market later, signal management incentives and potential dilution, and reveal confidence in future company performance.

aggregate sale price financial

"Common | 08/18/2026 | 13144 | 190649.34"

FAQ

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

What does the Form 144 filing disclose about RIVN insider Claire McDonough?

It discloses that officer Claire R. McDonough has filed a Rule 144 notice to sell 8,023 shares of Rivian Automotive, Inc. common stock, described as restricted stock acquired from the issuer on August 15, 2026, through Morgan Stanley Smith Barney LLC.

How many RIVN shares are proposed to be sold under this Form 144?

The notice covers a proposed sale of 8,023 shares of Rivian Automotive, Inc. common stock. The filing lists an aggregate market value of $128,368.00 for this block, with Morgan Stanley Smith Barney LLC as the broker.

What prior RIVN stock sales by Claire McDonough are reported in the past 3 months?

The notice lists Rivian common stock sales by Claire R. McDonough of 7,600 shares on May 21, 2026, 8,023 shares on May 29, 2026, 8,022 shares on June 3, 2026, and 13,144 shares on August 18, 2026, with corresponding aggregate sale prices.

What is the reported value of the proposed 8,023 RIVN shares to be sold?

The filing reports an aggregate market value of $128,368.00 for the proposed sale of 8,023 shares of Rivian common stock to be executed through Morgan Stanley Smith Barney LLC on or after August 20, 2026.

What type of securities is Claire McDonough selling under Rule 144 for RIVN?

The securities are described as restricted stock of Rivian Automotive, Inc., acquired from the issuer on August 15, 2026. The Form 144 relates to a proposed sale of 8,023 restricted shares of common stock.

Which broker is handling the proposed RIVN share sale under this Form 144?

The proposed sale of 8,023 shares of Rivian Automotive, Inc. common stock is listed as being handled through Morgan Stanley Smith Barney LLC Executive Financial Services, located at 1 New York Plaza in New York.

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

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google

Add on Google Not now

Available on EDGAR 08/20/2026 - 04:54 PM EDT Accepted by SEC EDGAR 08/20/2026 - 04:53 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	0001890925
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	RIVIAN AUTOMOTIVE, INC.
SEC File Number	001-41042
Address of Issuer	14600 MYFORD ROAD IRVINE CALIFORNIA 92606
Phone	(888) 748-4261
Name of Person for Whose Account the Securities are To Be Sold	CLAIRE R MCDONOUGH
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	8023	128368.00	1443948130	08/20/2026	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	08/15/2026	Restricted Stock	Issuer			8023	08/15/2026	Not Applicable

* 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
CLAIRE R MCDONOUGH 14600 MYFORD ROAD IRVINE CA 92606	Common	08/18/2026	13144	190649.34
CLAIRE R MCDONOUGH 14600 MYFORD ROAD IRVINE CA 92606	Common	06/03/2026	8022	144396.00
CLAIRE R MCDONOUGH 14600 MYFORD ROAD IRVINE CA 92606	Common	05/29/2026	8023	128368.00
CLAIRE R MCDONOUGH 14600 MYFORD ROAD IRVINE CA 92606	Common	05/21/2026	7600	106400.00

144: Remarks and Signature

Remarks
Date of Notice	08/20/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	09/02/2025
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/ Claire Raun McDonough
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)