RIVN Form 144: Affiliate files to sell 5,544 shares

RIVN affiliate filed a Form 144 to offer Common stock.

Rhea-AI Filing Summary

RIVN affiliate filed a Form 144 to offer Common stock. The notice lists 5,544 Common shares of Restricted Stock dated 05/15/2026, with brokerage placement at Morgan Stanley Smith Barney LLC Executive Financial Services.

The filing also records a prior sale by Claire R. McDonough of 10,245 Common shares on 04/22/2026 for proceeds of $184,410.00. The filing date shown is 05/18/2026.

Insights

Securities Attorney

Form 144 notifies the market of a proposed affiliate sale of restricted shares.

The filing lists 5,544 Common shares of Restricted Stock dated 05/15/2026 and names Morgan Stanley Smith Barney LLC as the broker-dealer. This is a notice of intent to sell, not a confirmation of completed sales.

Trading activity will depend on whether the affiliate completes transactions under applicable resale rules; cash-flow treatment is not specified in the provided excerpt.

Key Figures

Shares offered (Form 144): 5,544 shares Prior sale (insider): 10,245 shares Proceeds recorded: $184,410.00 +2 more

5 metrics

Shares offered (Form 144) 5,544 shares Restricted Stock dated 05/15/2026

Prior sale (insider) 10,245 shares Sale by Claire R. McDonough on 04/22/2026

Proceeds recorded $184,410.00 Proceeds from 04/22/2026 sale by Claire R. McDonough

Filing date 05/18/2026 Form 144 filing date shown

Security type Common (Restricted Stock) Securities to be sold listed as Restricted Stock

Key Terms

Form 144, Restricted Stock, Issuer

3 terms

Form 144 regulatory

"Filer Information | 144: Filer Information"

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 financial

"Securities To Be Sold | 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.

Issuer regulatory

"Securities To Be Sold | Restricted Stock | ISSUER"

FAQ

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

What does RIVN's Form 144 filing report?

It reports an affiliate's notice to sell Common stock, listing 5,544 shares of Restricted Stock dated 05/15/2026. The form names Morgan Stanley Smith Barney LLC as the broker-dealer and shows a filing date of 05/18/2026.

Who is the broker-dealer handling the proposed sale in the RIVN filing?

The broker-dealer shown is Morgan Stanley Smith Barney LLC Executive Financial Services. The filing includes the broker's address at 1 New York Plaza, 8th Floor, New York, NY and lists NASDAQ in the excerpt.

Does the Form 144 show any completed sales for insiders?

Yes; the excerpt records Claire R. McDonough selling 10,245 Common shares on 04/22/2026 for proceeds of $184,410.00. That line documents a past completed sale in the three-month window.

What type of shares are being offered in this Form 144?

The filing lists the securities as Restricted Stock of Common shares, with the specific offering line showing 5,544 shares dated 05/15/2026. The excerpt identifies the sale as by the Issuer line.

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

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Accepted by SEC EDGAR 05/18/2026 - 04:34 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	5544	74481.19	1256505294	05/18/2026	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	05/15/2026	Restricted Stock	ISSUER			5544	05/15/2026	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	04/22/2026	10245	184410.00

144: Remarks and Signature

Remarks
Date of Notice	05/18/2026
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)