X0306 4/A 2022-03-20 2022-03-22 0 0000936395 CIENA CORP CIEN 0001177261 ALEXANDER STEPHEN B C/O CIENA CORPORATION 7035 RIDGE RD. HANOVER MD 21076-1426 0 1 0 0 SVP, Chief Technology Officer Common Stock 78894 D On March 22, 2022, the reporting person filed a Form 4 inadvertently reporting that, on March 20, 2022, following the withholding of shares to cover payment of tax liabilities relating to restricted stock unit award agreements, he directly beneficially owned 37,600 shares of the Issuer's common stock. As reported in this amendment, the reporting person actually beneficially owned 78,894 shares following these transactions. The amount of shares beneficially owned following reported transactions in all reports filed by the reporting person subsequent to the date of the original report and prior to the date of this amendment also reflect this discrepancy. by: Michelle Rankin For: Stephen B. Alexander 2022-12-15