Rivian (RIVN)

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-05-15 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: Rivian Automotive, Inc. / DE (RIVN) CIK: 0001874178 --- Reporting Owner --- Name: CALLAHAN MICHAEL JOHN CIK: 0001262742 Role: Officer (Chief Administrative Officer) --- Non-Derivative Transactions --- [Transaction #1] Security: Class A Common Stock Date: 2026-05-15 | Code: F (Payment of exercise/tax) Shares: -42,082 | Price: $14.52 Total Value: $611,030.64 Shares Owned After: 1,072,176 | Ownership: D (Direct) Footnotes: [F1] 42,082 shares of Class A Common Stock were withheld by the Company for the purposes of satisfying tax withholding obligations in connection with the vesting of 82,703 Restricted Stock Units on May 15, 2026. [F2] The closing price of the Issuer's Class A Common Stock on May 14, 2026. --- Footnotes (Complete Index) --- F1: 42,082 shares of Class A Common Stock were withheld by the Company for the purposes of satisfying tax withholding obligations in connection with the vesting of 82,703 Restricted Stock Units on May 15, 2026. F2: The closing price of the Issuer's Class A Common Stock on May 14, 2026. --- Signature --- /s/ /s/ Jamie Chung, Attorney-in-Fact (2026-05-19)