Form 4 Filing for CIENA CORP - Officer Transaction

This filing details a transaction by Marc D. Graff, SVP & Chief Financial Officer of CIENA CORP, on August 1, 2026. Mr. Graff disposed of 14,441 shares of Common Stock at a price of $377.05 per share. This disposal was to cover tax liabilities related to a restricted stock unit (RSU) award agreement dated August 1, 2025. The transaction code is "F", indicating a voluntary disposition. Following this transaction, Mr. Graff owns 112,514 shares, a portion of which are unvested RSUs. The filing was signed by Michelle Rankin on behalf of Mr. Graff on August 4, 2026.