X0306 4 2021-05-03 0 0000917273 RAMBUS INC RMBS 0001275868 ROGGE KAREN M C/O RAMBUS INC. 4453 NORTH FIRST STREET, SUITE 100 SAN JOSE CA 95134 1 0 0 0 Common Stock 2021-05-03 4 A 0 8303 0.00 A 8303 D The shares are represented by restricted stock units, or RSUs, all of which vest May 3, 2022 or the first business day thereafter. Each RSU represents the contingent right to receive one share of RMBS common stock. /s/ Keith Jones, by power of attorney 2021-05-04