Rivian (RIVN)

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-03-20 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: 2026-03-20 | Code: A (Grant or award) Shares: +264,201 | Price: $0.00 Shares Owned After: 1,114,258 | Ownership: D (Direct) Footnotes: [F1] Represents an award of 264,201 restricted stock units ("RSUs") which will vest on each of the next sixteen quarterly anniversaries after February 15, 2026. Each RSU represents a contingent right to receive one share of the Issuer's Class A Common Stock and has no expiration date. --- Derivative Transactions --- [Transaction #1] Security: Stock Option Date: 2026-03-20 | Code: A (Grant or award) Shares: +528,402 | Price: $0.00 Exercisable: N/A | Expires: 2036-03-20 Shares Owned After: 528,402 | Ownership: D (Direct) Footnotes: [F2] The stock option will vest annually as to 25% of the underlying shares over the next four anniversaries of March 20, 2026. --- Footnotes (Complete Index) --- F1: Represents an award of 264,201 restricted stock units ("RSUs") which will vest on each of the next sixteen quarterly anniversaries after February 15, 2026. Each RSU represents a contingent right to receive one share of the Issuer's Class A Common Stock and has no expiration date. F2: The stock option will vest annually as to 25% of the underlying shares over the next four anniversaries of March 20, 2026. --- Signature --- /s/ /s/ Jamie Chung, Attorney-in-Fact (2026-03-24)