X0306 4 2021-08-02 0001177394 SYNNEX CORP SNX 0001270710 POLK DENNIS 44201 NOBEL DRIVE FREMONT CA 94538 1 1 Chief Executive Officer Common Stock 2021-08-02 4 M 0 4000 19.29 A 129159 D Common Stock 2021-08-02 4 S 0 100 122.08 D 129059 D Common Stock 2021-08-02 4 S 0 100 121.25 D 128959 D Common Stock 2021-08-02 4 S 0 100 120.70 D 128859 D Common Stock 2021-08-02 4 S 0 100 120.57 D 128759 D Common Stock 2021-08-02 4 S 0 2 120.54 D 128757 D Common Stock 2021-08-02 4 S 0 100 120.48 D 128657 D Common Stock 2021-08-02 4 S 0 200 120.29 D 128457 D Common Stock 2021-08-02 4 S 0 100 120.11 D 128357 D Common Stock 2021-08-02 4 S 0 100 120.095 D 128257 D Common Stock 2021-08-02 4 S 0 100 120.09 D 128157 D Common Stock 2021-08-02 4 S 0 100 120.06 D 128057 D Common Stock 2021-08-02 4 S 0 100 120.01 D 127957 D Common Stock 2021-08-02 4 S 0 100 119.94 D 127857 D Common Stock 2021-08-02 4 S 0 100 119.89 D 127757 D Common Stock 2021-08-02 4 S 0 100 119.54 D 127657 D Common Stock 2021-08-02 4 S 0 100 119.35 D 127557 D Common Stock 2021-08-02 4 S 0 100 119.31 D 127457 D Common Stock 2021-08-02 4 S 0 100 119.29 D 127357 D Common Stock 2021-08-02 4 S 0 100 119.28 D 127257 D Common Stock 2021-08-02 4 S 0 100 119.25 D 127157 D Common Stock 2021-08-02 4 S 0 100 119.22 D 127057 D Common Stock 2021-08-02 4 S 0 100 118.95 D 126957 D Common Stock 2021-08-02 4 S 0 100 118.94 D 126857 D Common Stock 2021-08-02 4 S 0 100 118.93 D 126757 D Common Stock 2021-08-02 4 S 0 100 118.89 D 126657 D Common Stock 2021-08-02 4 S 0 100 118.88 D 126557 D Common Stock 2021-08-02 4 S 0 100 118.65 D 126457 D Stock Option (Right to Buy) 19.29 2021-08-02 4 M 0 4000 0 D 2023-10-03 Common Stock 4000 6584 D These sales were effectuated pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on April 22,2021. This stock option is immediately exercisable and is fully vested. /s/ Simon Y. Leung, Attorney-in-Fact 2021-08-04