Form 4 Filing for CIENA CORP

This filing details a series of transactions by Dino DiPerna, SVP Global R&D at CIENA CORP, on December 20, 2025. The transactions involve the disposal of Common Stock, with a total of 7865 shares disposed of at a price of $230.34 per share. These disposals are primarily related to covering tax liabilities arising from restricted stock unit (RSU) and performance stock unit (PSU) awards granted on various dates between December 13, 2022, and December 17, 2024. The footnotes indicate that the shares reported include unvested RSUs and PSUs, and that the acquisition of these units was previously reported in earlier filings. The post-transaction shares owned by DiPerna are reported to be 52,395.