Ciena Corporation (CIEN:NYSE) closed at $351.15 on October 27, 2026, up 4.53% on the day. The stock trades 44.9% below its 52-week high of $637.51 and 108.7% above its 52-week low of $168.22. Over the past year, it gained 84.0%. Ciena Corporation is part of the Public Utilities sector (Telecommunications Equipment).
In 252 trading sessions since October 27, 2025, CIEN closed higher on 138 days (55%). Its best day was October 6, 2026 (+13.85%) and its worst was June 4, 2026 (-13.66%). The stock moved 10% or more in a single session 14 times. It opened at least 5% above the previous day's high 3 times.
Ciena Corporation provides equipment, software, and services that support the transport, switching, aggregation, service delivery, and management of voice, video, and data traffic on communications networks worldwide. The company's Networking Platforms segment offers hardware networking solutions optimized for the convergence of coherent optical transport, optical transport network switching, and packet switching. Its products include 6500 Packet-Optical Platform and the 5430 Reconfigurable Switching System, Waveserver stackable interconnect system, CoreDirector Multiservice Optical Switches, and OTN configuration for the 5410 Reconfigurable Switching System, as well as Z-Series Packet-Optical Platform; 3000 family of service delivery switches and service aggregation switches, and the 5000 family of service aggregation switches, as well as 8700 Packetwave Platform and the Ethernet packet configuration for the 5410 Service Aggregation Switch; and 4200 Advanced Services Platform, Corestream 5100/5200 Advanced Services Platform, Common Photonic Layer, and 6100 Multiservice Optical Platform. This segment also sells operating system software and enhanced software features embedded in ea...
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