As of December 2025 Ciena has a market cap of A$43.35 Billion. This makes Ciena the world's 814th most valuable company by market cap according to our data. The market capitalization, commonly called market cap, is the total market value of a publicly traded company's outstanding shares and is commonly used to measure how much a company is worth.
On Dec 16th, 2025 the market cap of Ciena was reported to be: