Initial Statement of Beneficial Ownership (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

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(Print or Type Responses)

1. Name and Address of Reporting Person * Mulvey Derek B 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] (Last) (First) (Middle) C/O RIVIAN AUTOMOTIVE, INC., 14600 MYFORD ROAD 4. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Interim CFO 5. If Amendment, Date Original Filed (Month/Day/Year) (Street) IRVINE, CA 92606 6. Individual or Joint/Group Filing (Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) 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

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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 of Derivative Security: 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

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Mulvey Derek B C/O RIVIAN AUTOMOTIVE, INC. 14600 MYFORD ROAD IRVINE, CA 92606			Interim CFO

Signatures

/s/ Jamie Chung, Attorney-in-Fact		10/30/2026
**Signature of Reporting Person		Date

Explanation of Responses:

*	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).
(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.

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