X0609 4 2026-08-07 0000917273 RAMBUS INC RMBS 0001188095 KISSNER CHARLES false C/O RAMBUS INC. 4453 NORTH FIRST STREET, SUITE 100 SAN JOSE CA 95134 true false false false true Common Stock 2026-08-07 4 S false 5000 100.92 D 13747 I See Footnote Common Stock 40545 D The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted on May 8, 2026. All shares sold at an exact price of $100.92. The shares are held directly by Kissner and Associates LLC for which the Reporting Person serves as the owner of the company. /s/ Brian Wu, by power of attorney 2026-08-10