Cienavs.Coherent
CIEN vs COHR · both in Data centers, part of the AI & digital infrastructure value chain: Servers, networking, optics and data center capacity that tie AI infrastructure together.
Ciena and Coherent are similar in size by market cap; Coherent trades at the lower P/E (81.4 vs 96.7); year to date, Ciena leads (+89.7% vs +83.3%).
Supply-chain link: Coherent supplies Ciena.
Side by side
| CIEN | COHR | |
|---|---|---|
| Market cap | $63.3B | $65.5B |
| Price | $425.93 | $302.35 |
| Today | −4.6% | −9.6% |
| Return YTD | +89.7% | +83.3% |
| Return 1Y | +189.5% | +194.8% |
| Since June 26, 2026 | −11.2% | −20.6% |
| P/E | 96.7 | 81.4 |
| P/S | 10.5 | 9.2 |
| P/B | 20.7 | 6.0 |
Data as of 2026-10-08 · updates daily after U.S. close
Since June 26, 2026: the change in the closing price, from the daily closes Sectivia records itself since that date.
The two companies
CoherentCOHR
Makes the transceivers and lasers that turn data into light for the hop between AI servers.
Full COHR profile →More CIEN & COHR comparisons
Other head-to-heads in the Data centers segment.
See where CIEN and COHR sit in the full AI & digital infrastructure map: every segment from suppliers to end markets.Open the AI value chain →