X0508 4 2025-08-15 0 0000936395 CIENA CORP CIEN 0001998826 Gage Brodie C/O CIENA CORPORATION 7035 RIDGE RD. HANOVER MD 21076-1426 0 1 0 0 SVP Global Products & Supply 1 Common Stock 2025-08-15 4 S 0 350 90.94 D 43268 D Sales were effected pursuant to Rule 10b5-1 trading plan dated 09/06/2024. Shares reported include unvested Restricted Stock Units (RSUs) and Performance Stock Units (PSUs). By: Michelle Rankin For: Brodie Gage 2025-08-18