Notice of Proposed Sale · 144

Rivian Automotive, Inc.

RIVNNASDAQEQUITYCurrent

Notice of Proposed Sale

Filed Jul 6, 2026Accepted Jul 6, 2026, 4:57 PM EDTFiling CIK 1874178Accession 0001950047-26-006903

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Structured filing — 144

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Notice of proposed sale. The proposed amounts below do not establish that a sale occurred.

Proposed-sale notice

Issuer: Rivian Automotive, Inc.
Issuer CIK: 0001874178
SEC file number: 001-41042
Phone: 888-748-4261
Person for whose account securities are to be sold: RIVIAN FOUNDATION
Relationships to issuer: Affiliate
Street: 14600 Myford Road
City: Irvine
State / country code: CA
Postal code: 92606

Securities proposed for sale

Securities proposed for sale · 1 reported row
Security	Proposed units	Aggregate market value	Units outstanding	Approximate sale date	Exchange	Broker / market maker
Common	166,668	3,105,024.84	1,256,505,294	07/06/2026	NASDAQ	Morgan Stanley Smith Barney LLC Executive Financial Services

Broker / market maker — proposed row 1, entry 1

Name: Morgan Stanley Smith Barney LLC Executive Financial Services
Street: 1 New York Plaza
Street (continued): 8th Floor
City: New York
State / country code: NY
Postal code: 10004

Acquisition of securities to be sold

Acquisition of securities to be sold · 1 reported row
Security	Acquired	Nature of acquisition	Acquired from	Amount acquired	Gift transaction	Payment date	Nature of payment
Common	11/15/2021	Founders Shares	Issuer	166,668	N	11/15/2021	N/A

Prior-sale reporting

Nothing to report for the preceding three months: Y

Notice signature

Notice date: 07/06/2026
Signed: /s/ Heath Nero
Plan adoption dates: 11/12/2025

Company context

Rivian (NASDAQ: RIVN) is an American automotive technology company that develops and builds category-defining electric vehicles as well as vertically integrated technologies and services. Through innovation across its electrical architecture, end-to-end software, autonomous driving platform, artificial intelligence and propulsion, the company creates vehicles that excel at work and play while accelerating the global transition to zero-emission transportation and energy. Rivian vehicles are manufactured in the United States and are sold directly to consumer and commercial customers. Whether taking families on new adventures or electrifying fleets at scale, Rivian vehicles all share a common goal - preserving the natural world for generations to come.

Current securities

RIVNNASDAQ · EQUITY · Current

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