X0306 4 2022-05-30 0 0001101680 DZS INC. DZSI 0001655819 Ferguson Justin K. C/O DZS INC. 5700 TENNYSON PKWY, 4TH FLOOR PLANO TX 75024 0 1 0 0 Chief Legal Officer Restricted Stock Units 2022-05-30 4 A 0 5517 A Common Stock 5517 5517 D These restricted stock units were granted pursuant to the issuer's 2017 Incentive Award Plan and will vest in one equal installments on May 30, 2023, subject to the reporting person's continued employment with the issuer on the 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 2022-06-01