Form 4 Filing for CIENA CORP

This filing details transactions by Gary B. Smith, President and CEO of CIENA CORP, on December 20, 2025. The transactions primarily involved the disposal of Common Stock, with shares withheld to cover tax liabilities related to various restricted stock unit (RSU), performance stock unit (PSU), and market stock unit (MSU) awards. Specific transactions include the disposal of 2,985 shares under an RSU award from 12/13/2022, 3,102 shares under an RSU award from 12/12/2023, and 1,743 shares under an RSU award from 12/17/2024. Additional disposals include 1,658 shares related to an RSU award from 12/14/2021, 57,301 shares related to an MSU award from 12/13/2022, 10,916 shares related to a PSU award from 12/17/2024, another 12,547 shares related to a PSU award from 12/17/2024, and 8,933 shares related to a PSU award from 12/12/2023. All transactions were executed at a price of $230.34 per share. The filing also notes that shares reported include unvested RSUs and PSUs.