X0306 4 2023-03-13 0 0000917273 RAMBUS INC RMBS 0001341984 Seraphin Luc C/O RAMBUS INC. 4453 NORTH FIRST STREET, SUITE 100 SAN JOSE CA 95134 1 1 0 0 President and CEO Common Stock 2023-03-13 4 S 0 12500 41.0605 D 354653 D The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted on December 13, 2022. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $40.50 to $41.51, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. /s/ Brian Wu, by power of attorney 2023-03-14