X0508 4 2022-01-11 0 0001874178 Rivian Automotive, Inc. / DE RIVN 0001189130 FLATLEY JAY T C/O RIVIAN AUTOMOTIVE, INC. 14600 MYFORD ROAD IRVINE CA 92606 1 0 0 0 0 Class A Common Stock 2022-01-11 4 P 0 30 82.8377 A 160850 D Class A Common Stock 2022-01-26 4 S 0 30 62.2214 D 160820 D Class A Common Stock 2022-05-13 4 P 0 60 26.8331 A 160880 D Class A Common Stock 2022-12-13 4 S 0 3 24.99 D 160877 D Class A Common Stock 2022-12-13 4 S 0 57 25.7474 D 160820 D Class A Common Stock 2023-07-06 4 P 0 490 20.6746 A 161310 D Class A Common Stock 2023-10-23 4 S 0 490 17.0726 D 160820 D Class A Common Stock 2024-04-17 4 P 0 1250 8.844 A 162070 D The Reporting Person's sale of 30 shares Class A common stock on January 26, 2022 at a price of $62.2214 per share was matchable under Section 16(b) of the Securities Exchange Act of 1934, to the extent of 30 shares, with the Reporting Person's purchase of 60 shares of Class A common stock on May 13, 2022 at a price of $26.8331 per share. The Reporting Person paid to the Issuer $1,061.65, representing the full amount of the profit realized in connection with the short-swing transaction. The Reporting Person's sale of 490 shares Class A common stock on October 25, 2023 at a price of $17.0726 per share was matchable under Section 16(b) of the Securities Exchange Act of 1934, to the extent of 490 shares, with the Reporting Person's purchase of 1,250 shares of Class A common stock on April 17, 2024 at a price of $8.844 per share. The Reporting Person paid to the Issuer $4,032.01, representing the full amount of the profit realized in connection with the short-swing transaction. The transactions reported in this Form 4 were made by the Reporting Person's financial advisor due to an administrative error and without the Reporting Person's knowledge. The reporting of these transactions was untimely because the Reporting Person did not become aware of the transactions until a later date. /s/ Jamie Chung, Attorney-in-Fact 2026-03-05