X0609 4 2026-09-22 0000912093 VIAVI SOLUTIONS INC. VIAV 0001634069 Siebert Kevin Christopher false C/O VIAVI SOLUTIONS INC. 1445 SOUTH SPECTRUM BLVD, SUITE 102 CHANDLER AZ 85286 1 SVP Gen. Counsel & Secretary 0 Common Stock 2026-09-22 4 M 0 15909 0 A 56648 D Common Stock 2026-09-22 4 F 0 7175 36.40 D 49473 D Common Stock 2026-09-22 4 M 0 23148 0 A 72621 D Common Stock 2026-09-22 4 F 0 10440 36.40 D 62181 D Common Stock 2026-09-22 4 M 0 17256 0 A 79437 D Common Stock 2026-09-22 4 F 0 7783 36.40 D 71654 D Market Stock Units 0 2026-09-22 4 M 0 15909 0 D Common Stock 15909 0 D Market Stock Units 0 2026-09-22 4 M 0 23148 0 D Common Stock 23148 15432 D Market Stock Units 0 2026-09-22 4 M 0 17256 0 D Common Stock 17256 23012 D Each stock unit converts upon vesting into one share of common stock. These shares were retained by the Company in order to meet the tax withholding obligations of the award-holder in connection with the vesting of an installment of the market stock award. The amount retained by the Company was not in excess of the amount of the tax liability. Shares reflect the vesting of the 3rd tranche of market-leveraged stock units granted on August 28, 2023 at 150.00% of target based on our total stockholder return during the performance periods as stated on the grant agreement. There are no expiration dates on MSUs. Shares reflect the vesting of the 2nd tranche of market-leveraged stock units granted on August 28, 2024 at 150.00% of target based on our total stockholder return during the performance periods as stated on the grant agreement. Shares reflect the vesting of the 1st tranche of market-leveraged stock units granted on August 28, 2025 at 150.00% of target based on our total stockholder return during the performance periods as stated on the grant agreement. /s/ Donna T. Rossi, attorney-in-fact 2026-09-23