Claire R. McDonough sells shares; RIVN (NASDAQ: RIVN) Form 144 lists April–May 2026 trades

Rhea-AI Filing Summary

RIVN affiliate Claire R. McDonough reported proposed sales of Common stock on a Form 144 through Morgan Stanley Smith Barney LLC.

The filing identifies the securities as Restricted Stock, Common and lists multiple reported dispositions during the prior three months, including 8,023 shares for $128,368.00 on 05/29/2026, 7,600 shares for $106,400.00 on 05/21/2026, 5,544 shares for $74,481.19 on 05/18/2026, and 10,245 shares for $184,410.00 on 04/22/2026.

Insights

Securities Compliance Analyst

Form 144 filing documents proposed resale activity by an affiliate; entries show multiple recent sales.

The filing names Claire R. McDonough as the reporting person and lists the broker as Morgan Stanley Smith Barney LLC Executive Financial Services. It classifies the securities as Restricted Stock, Common and records discrete past three‑month dispositions with dates and share/amount pairs.

Regulatory implications are procedural: these entries notify the SEC of proposed sales under Rule 144. Cash‑flow treatment and any holding-period qualifications are not shown in the excerpt; subsequent filings or trade confirmations would provide that detail.

Key Figures

Disposition on 05/29/2026: 8,023 shares Disposition on 05/21/2026: 7,600 shares Disposition on 05/18/2026: 5,544 shares +1 more

4 metrics

Disposition on 05/29/2026 8,023 shares reported proceeds $128,368.00

Disposition on 05/21/2026 7,600 shares reported proceeds $106,400.00

Disposition on 05/18/2026 5,544 shares reported proceeds $74,481.19

Disposition on 04/22/2026 10,245 shares reported proceeds $184,410.00

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

"Common | 05/15/2026 | 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.

Issuer legal

"Restricted Stock | ISSUER"

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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
Filer CCC
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

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

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	8022	144396.00	1256505294	06/03/2026	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			8022	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	05/29/2026	8023	128368.00
CLAIRE R MCDONOUGH 14600 MYFORD ROAD IRVINE CA 92606	Common	05/21/2026	7600	106400.00
CLAIRE R MCDONOUGH 14600 MYFORD ROAD IRVINE CA 92606	Common	05/18/2026	5544	74481.19
CLAIRE R MCDONOUGH 14600 MYFORD ROAD IRVINE CA 92606	Common	04/22/2026	10245	184410.00

144: Remarks and Signature

Remarks

Date of Notice

Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1

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

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

What does the RIVN Form 144 filing by Claire R. McDonough indicate?

It indicates a proposed resale of Restricted Common stock reported on Form 144 through Morgan Stanley Smith Barney LLC. The filing lists multiple recent dispositions with dates and share/amount pairs, showing reported sales in April and May 2026.

How many shares and proceeds are listed in the filing for Claire R. McDonough?

The filing lists four reported dispositions: 8,023 shares for $128,368.00 (05/29/2026), 7,600 shares for $106,400.00 (05/21/2026), 5,544 shares for $74,481.19 (05/18/2026), and 10,245 shares for $184,410.00 (04/22/2026).

Who is the broker handling the reported sales in the RIVN Form 144?

The broker named is Morgan Stanley Smith Barney LLC Executive Financial Services, located at 1 New York Plaza, 8th Floor, New York, NY. The filing associates that broker with the reported proposed sales.

Does the Form 144 excerpt specify the cash‑flow recipient or use of proceeds?

The excerpt does not state who receives the proceeds or how proceeds will be used. It lists share counts, dates, and dollar amounts for reported dispositions but does not disclose proceeds recipients or intended uses.