Ciena Corporation (CIEN, US) is a USA company in the Networking & Switching segment of the AI compute value chain. As of October 04, 2026, its market cap is $55.5 billion ($55.5B), ranking #58 of 244 companies overall and #4 of 12 in the Networking & Switching segment (6.0% of the segment, 0.22% of the chain). Over the past year the stock gained 156.3% (52-week range 151.45 – 627.00 USD).
| Company | Ciena Corporation（Ciena） |
|---|---|
| Ticker | CIEN · US |
| Segment | Networking & Switching |
| Headquarters | USA |
| Market cap | $55.5B（$55.5 billion） |
| Close | 391.34 USD (October 04, 2026) |
| Today | +3.22% |
| 30 days | -0.29% |
| 1 year | +156.35% |
| 52-wk high / low | 627.00 / 151.45 USD |
| Share of segment | 6.0% (Networking & Switching: 12 companies) |
| Share of chain | 0.22% (244 companies combined) |
| Segment leader | Cisco Systems ($442.4B) |
| Revenue (TTM) | $6.0 billion |
|---|---|
| Net income (TTM) | $654.4 million |
| Employees | 9,080 |
| P/E ratio (TTM) | 87.5 |
| P/B ratio | 18.17 |
| Gross margin | 44.1% |
| Net margin | 10.9% |
| Basis | TTM (source: StockAnalysis, 2026-10-05 07:49) |
| # | Company | Market | Market cap |
|---|---|---|---|
| 1 | Cisco Systems CSCO | US | $442.4B |
| 2 | Arista Networks ANET | US | $261.5B |
| 3 | Nokia NOK | US | $59.3B |
| 4 | Ciena Corporation CIEN | US | $55.5B |
| 5 | Ericsson ERIC | US | $30.3B |
| 6 | ZTE 000063 | SZ | $21.8B |
| 7 | Centec Networks 688702 | SH | $17.4B |
| 8 | Ruijie Networks 301165 | SZ | $16.7B |
| 9 | Unisplendour 000938 | SZ | $13.2B |
| 10 | Fujian Star-net Communication 002396 | SZ | $3.7B |