Rivian interim CFO Mulvey reports 296,200-share position

The reported position includes 218,855 unvested RSUs, each a contingent right to receive one Class A share.

Available on EDGAR 10/30/2026 - 05:34 PM EDT Accepted by SEC EDGAR 10/30/2026 - 05:33 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

Rivian Automotive, Inc. (RIVN) reports that Interim CFO Derek B. Mulvey had a direct position of 296,200 shares of Class A Common Stock as of October 30, 2026. The reported amount includes 218,855 unvested restricted stock units (RSUs), each a contingent right to receive one Class A share, as well as 73,057 shares resulting from previously vested RSUs, 1,798 shares purchased under the Employee Stock Purchase Plan and 2,490 shares purchased through the Directed Share Program at the IPO.

Insider Trade Summary

Holdings reported, no transactions

Holdings

Insider Mulvey Derek B

Role Interim CFO

Type	Security	Shares	Price	Value
Holding	Class A Common Stock F1	--	--	--

Holdings: Class A Common Stock — 296,200 shares (Direct)

Footnotes (1)

1. F1. Consists of: (i) 73,057 shares resulting from previously vested Restricted Stock Units ("RSUs"), (ii) 1,798 shares purchased pursuant to the Issuer's 2021 Employee Stock Purchase Plan, (iii) 2,490 shares purchased pursuant to the Issuer's Directed Share Program at the time of its Initial Public Offering, and (iv) 218,855 unvested RSUs. Of the aggregate 218,855 unvested RSUs: (i) 160 of such unvested RSUs will vest on the next quarterly anniversary after August 15, 2026, (ii) 24,500 of such unvested RSUs will vest over the next three quarterly anniversaries after August 15, 2026, (iii) 68,803 of such unvested RSUs will vest over the next ten quarterly anniversaries after August 15, 2026, and (iv) 125,392 of such unvested RSUs will vest as to 50% on February 15, 2027 and 50% on August 15, 2027. Each RSU represents a contingent right to receive one share of the Issuer's Class A Common Stock and has no expiration date.

Key Figures

Direct Class A Common Stock position: 296,200 shares Unvested RSUs: 218,855 RSUs Shares resulting from previously vested RSUs: 73,057 shares +2 more

5 metrics

Direct Class A Common Stock position 296,200 shares As of October 30, 2026

Unvested RSUs 218,855 RSUs Included in the reported position

Shares resulting from previously vested RSUs 73,057 shares Included in the reported position

Employee Stock Purchase Plan purchases 1,798 shares Included in the reported position

Directed Share Program purchases 2,490 shares At the IPO; included in the reported position

Key Terms

Restricted Stock Units, Employee Stock Purchase Plan, Directed Share Program

3 terms

Restricted Stock Units financial

"previously vested Restricted Stock Units ("RSUs")"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

Employee Stock Purchase Plan financial

"purchased pursuant to the Issuer's 2021 Employee Stock Purchase Plan"

An employee stock purchase plan is a company program that lets workers buy shares through small payroll deductions, often at a discount to the market price and after a set offering period. Think of it like a workplace savings plan that turns into ownership: it encourages employees to share in the company’s success and can create predictable buying or selling of stock that investors watch because it affects supply, demand and employee incentives.

Directed Share Program financial

"purchased pursuant to the Issuer's Directed Share Program"

FAQ

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

How many Rivian shares does Interim CFO Derek B. Mulvey hold?

Derek B. Mulvey had a reported direct position of 296,200 shares of Class A Common Stock as of October 30, 2026. The amount includes unvested RSUs as well as shares resulting from previously vested RSUs and shares purchased through company programs.

When do Derek B. Mulvey's unvested Rivian RSUs vest?

Of 218,855 unvested RSUs, 160 vest on the next quarterly anniversary after August 15, 2026; 24,500 over the next three quarterly anniversaries; and 68,803 over the next ten quarterly anniversaries. The remaining 125,392 vest 50% on February 15, 2027 and 50% on August 15, 2027.

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

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SEC Form 3

FORM 3

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

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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:			3235-0104
Estimated average burden
hours per response:			0.5

1. Name and Address of Reporting Person^*

Mulvey Derek B

(Last) (First) (Middle)

C/O RIVIAN AUTOMOTIVE, INC.

14600 MYFORD ROAD

(Street)

IRVINE CALIFORNIA 92606

(City) (State) (Zip)

UNITED STATES

(Country)

2. Date of Event Requiring Statement (Month/Day/Year)
10/30/2026

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

3a. Foreign Trading Symbol

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

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

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Interim CFO

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

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

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Class A Common Stock	296,200(1)	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Consists of: (i) 73,057 shares resulting from previously vested Restricted Stock Units ("RSUs"), (ii) 1,798 shares purchased pursuant to the Issuer's 2021 Employee Stock Purchase Plan, (iii) 2,490 shares purchased pursuant to the Issuer's Directed Share Program at the time of its Initial Public Offering, and (iv) 218,855 unvested RSUs. Of the aggregate 218,855 unvested RSUs: (i) 160 of such unvested RSUs will vest on the next quarterly anniversary after August 15, 2026, (ii) 24,500 of such unvested RSUs will vest over the next three quarterly anniversaries after August 15, 2026, (iii) 68,803 of such unvested RSUs will vest over the next ten quarterly anniversaries after August 15, 2026, and (iv) 125,392 of such unvested RSUs will vest as to 50% on February 15, 2027 and 50% on August 15, 2027. Each RSU represents a contingent right to receive one share of the Issuer's Class A Common Stock and has no expiration date.

Remarks:

	/s/ Jamie Chung, Attorney-in-Fact	10/30/2026
	** 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 5 (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 3: SEC 1473 (03-26)