X0306 4 2020-07-29 0 0000890394 MoSys, Inc. MOSY 0001717967 O'Neil Daniel Joseph 2309 BERING DR SAN JOSE CA 95131 1 0 0 0 Restricted Stock Units 2020-07-29 4 A 0 1000 A 3000 D Restricted Stock Unit ("RSU") award granted on July 29, 2020. Each RSU represents a contingent right to receive one share of the Company's common stock once vested. The entire award vests and becomes non-forfeitable on July 29, 2021, or, if earlier, the date of the next annual meeting of stockholders following the Grant Date, subject to reporting person's continuous service with the Company. In accordance with Instruction 4 to this Form, Column 5 reports only the total beneficial ownership of the "class" of derivative security reported in Column 1. /s/ James Sullivan by power of attorney 2020-07-29