X0508 4 2026-02-15 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 1 Class A Common Stock 2026-02-15 4 F 0 35578 17.73 D 1079631 D Class A Common Stock 2026-02-18 4 S 0 34900 16.7976 D 1044731 D Class A Common Stock 2297 I By LLC Class A Common Stock 2632766 I By Trust 35,578 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 86,539 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 automatically pursuant to a previously disclosed Rule 10b5-1 trading plan adopted on March 14, 2025 and amended on June 11, 2025, as disclosed in the Issuer's Quarterly Report on Form 10-Q for each such quarter. The price reported is a weighted average sale price. The shares were sold in multiple transactions at prices ranging from $16.49 to $17.07, 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