X0609 4 2026-10-20 0 0001874178 Rivian Automotive, Inc. / DE RIVN 0002066491 Gomez Aidan N. false C/O RIVIAN AUTOMOTIVE, INC. 14600 MYFORD RD IRVINE CA 92606 1 0 0 0 0 Class A Common Stock 2026-10-20 4 A 0 807 0 A 63984 D Class A Common Stock 2026-10-20 4 F 0 420 12.34 D 63564 D Represents an award of 807 restricted stock units ("RSUs"), which vested on October 20, 2026. 420 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 807 RSUs on October 20, 2026 The closing price of the Company's Class A Common Stock on October 19, 2026 /s/ Jamie Chung, Attorney-in-Fact 2026-10-22