X0306 4 2022-06-30 0 0001101680 DZS INC. DZSI 0001748276 Schopp David R C/O DZS INC. 5700 TENNYSON PKWY, 4TH FLOOR PLANO TX 75024 1 0 0 0 Common Stock 2022-06-30 4 M 0 972 A 20684 D Restricted Stock Units 2022-06-30 4 M 0 972 D Common Stock 972 1945 D Restricted Stock Units 2022-07-01 4 A 0 1095 A Common Stock 1095 1095 D This represents the second vesting on June 30, 2022 in the amount of 972 units for a total amount vested of 1,944 of the restricted stock units issued on January 3, 2022. Each restricted stock unit represents the right to receive one share of the issuer's common stock upon vesting. These restricted stock units were granted pursuant to the issuer's 2017 Incentive Award Plan and will vest in two equal installments on September 30, 2022 and December 31, 2022, subject to the reporting person's continued participation on the board of the issuer on each vesting date. Each restricted stock unit represents the right to receive one share of the issuer's common stock upon vesting. /s/Laura Larsen-Misunas as Power of Attorney 2022-07-05