X0206 3 2023-08-01 0 0000917273 RAMBUS INC RMBS 0001397728 Allen John K C/O RAMBUS INC. 4453 NORTH FIRST STREET, STE. 100 SAN JOSE CA 95134 0 1 0 0 Chief Accounting Officer Common Stock 8888 D The shares are represented by restricted stock units, or RSUs, which vest in four equal annual installments beginning on April 3, 2024 or the first business day thereafter. Each RSU represents a contingent right to receive one share of RMBS common stock. /s/Brian Wu, by power of attorney 2023-08-07