X0508 4 2026-02-15 0 0001874178 Rivian Automotive, Inc. / DE RIVN 0001890925 McDonough Claire C/O RIVIAN AUTOMOTIVE, INC. 14600 MYFORD ROAD IRVINE CA 92606 0 1 0 0 Chief Financial Officer 1 Class A Common Stock 2026-02-15 4 F 0 22048 17.73 D 707969 D Class A Common Stock 2026-02-18 4 S 0 27133 16.795 D 680836 D 22,048 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 59,426 Restricted Stock Units on February 15, 2026. The closing price of the Issuer's Class A Common Stock on February 13, 2026. 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. The price reported is a weighted average sale price. The shares were sold in multiple transactions at prices ranging from $16.49 to $17.08, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote. /s/ Jamie Chung, Attorney-in-Fact 2026-02-18