X0508 4 2025-11-06 0 0001874178 Rivian Automotive, Inc. / DE RIVN 0001891517 Scaringe Robert J C/O RIVIAN AUTOMOTIVE, INC. 14600 MYFORD ROAD IRVINE CA 92606 1 1 0 0 Chief Executive Officer 0 Stock Option 21.72 2025-11-06 4 D 0 20355946 0 D 2031-01-19 Class A Common Stock 20355946 4922182 D Stock Option 15.22 2025-11-06 4 A 0 36500000 0 A 2035-11-06 Class A Common Stock 36500000 36500000 D As disclosed in the Issuer's Current Report on Form 8-K as filed with the Securities and Exchange Commission on November 7, 2025 (the "Form 8-K"), the 2021 CEO Performance Award was cancelled in exchange for the granting of the 2025 CEO Award on November 6, 2025. (Defined terms used but not defined herein shall have the meanings ascribed thereto in the Form 8-K.) The time-based option awarded concurrently with the 2021 CEO Performance Award remains outstanding and will continue to vest according to its terms. The stock option vests as to 6,785,315 shares underlying the stock option in 6 substantially equal annual installments beginning on the first anniversary of the Issuer's IPO. The closing price of the Issuer's Class A Common Stock on November 6, 2025. As disclosed in the Form 8-K, the 2025 CEO Award vests as follows: (i) 22,000,000 shares underlying the stock option vest subject to the per share price of the Issuer's Class A Common Stock exceeding various thresholds, and (ii) 14,500,000 shares underlying the stock option vest upon the Issuer achieving certain financial performance targets, in each case subject to the Reporting Person's continued service in his current role on such vesting date. /s/ Jamie Chung, Attorney-in-Fact 2025-11-07