X0306 4 2016-02-01 0 0000917273 RAMBUS INC RMBS 0001276837 STARK LAURA 1050 ENTERPRISE WAY, SUITE 700 SUNNYVALE CA 94089 0 1 0 0 SVP, GM ESD Common Stock 2016-02-01 4 F 0 548 12.31 D 135860 D Common Stock 2016-02-01 4 A 0 24364 0.00 A 160224 D Common Stock 2016-02-02 4 F 0 1752 11.91 D 158472 D Common Stock 2016-02-02 4 A 0 17000 0.00 A 175472 D Employee stock option (right to buy) 12.31 2016-02-01 4 A 0 26800 0.00 A 2016-08-01 2026-02-01 Common Stock 26800 26800 D Shares are represented by restricted stock units. Each restricted stock unit represents a contingent right to receive one share of RMBS common stock. The restricted stock units vest in four equal annual installments beginning on February 1, 2017 or the first business trading day thereafter. Shares are represented by performance stock units. Each performance stock unit represents a contingent right to receive one share of RMBS common stock. The performance stock units vest in full on February 2, 2018 based upon assessed achievement of the Company's targeted pro forma operating margin for Fiscal Year 2015 and continued service to the Company through the vest date. One tenth of the shares subject to the option vest on August 1, 2016 and the remaining shares vest in equal monthly installments until they are fully vested on February 1, 2020. Transactions reported in Table 1, Code F reflect securities withheld to cover the tax liability for restricted stock units that vested on the respective transaction dates reported. /s/William Krause, by power of attorney 2016-02-03