CIEN key data
Ciena Corporation (WBAG: CIEN) has a market capitalization of $45.75B. Last close €288.10 (as of 2026-10-23); 52-week range €288.10 to €402.60. ORTEX data as of 2026-10-21: short interest is 0.36% of free float and the average cost to borrow is 0.41%.