Ciena Corporation Fiscal Q4 2025 Earnings Presentation Period ended November 1, 2025 December 11, 2025 © Ciena Corporation 2025. ll rights reserved. Proprietary Information. Forward-looking statements and non-GAAP measures You are encouraged to review the Investors section of our website, where we routinely post press releases, Securities and Exchange Commission (SEC) filings, recent news, financial results, supplemental financial information, and other announcements. From time to time, we exclusively post ...