Form 4 Filing for CIENA CORP

Sheela Kosaraju, EVP & Chief Legal Officer of CIENA CORP, reported a sale of 2101 shares of Common Stock on October 1, 2026, at a price of $355.19 per share. This transaction was conducted under a Rule 10b5-1 trading plan established on October 14, 2024. Following this sale, Ms. Kosaraju owns 84065 shares, which includes unvested Restricted Stock Units (RSUs) and Performance Stock Units (PSUs).