Rivian (RIVN)

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-08-20 10b5-1 Pre-arranged Plan: Yes --- Issuer --- Name: Rivian Automotive, Inc. / DE (RIVN) CIK: 0001874178 --- Reporting Owner --- Name: McDonough Claire CIK: 0001890925 Role: Officer (Chief Financial Officer) --- Non-Derivative Transactions --- [Transaction #1] Security: Class A Common Stock Date: 2026-08-20 | Code: S (Open market sale) Shares: -8,023 | Price: $16.00 Total Value: $128,368.00 Shares Owned After: 819,178 | Ownership: D (Direct) Footnotes: [F1] The sale reported in this transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 2, 2025, as described in the Issuer's Quarterly Report on Form 10-Q for the three months ended September 30, 2025, filed with the Securities and Exchange Commission on November 4, 2025. --- Footnotes (Complete Index) --- F1: The sale reported in this transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 2, 2025, as described in the Issuer's Quarterly Report on Form 10-Q for the three months ended September 30, 2025, filed with the Securities and Exchange Commission on November 4, 2025. --- Signature --- /s/ /s/ Jamie Chung, Attorney-in-Fact (2026-08-21)