X0306 4 2020-02-27 0 0001408278 Synacor, Inc. SYNC 0001236136 GINSBERG GARY L C/O SYNACOR, INC. 40 LA RIVIERE DRIVE, SUITE 300 BUFFALO NY 14202 1 0 0 0 Common Stock 2020-02-27 4 A 0 11932 1.10 A 50162 D The time-based vesting requirement shall be satisfied with respect to the Stock Units when the recipient completes three months of continuous service following the vesting commencement date of January 1, 2020. /s/ Timothy J. Heasley, attorney-in-fact 2020-03-02