Amphenolvs.Ciena
APH vs CIEN · both in Data centers, part of the AI & digital infrastructure value chain: Servers, networking, optics and data center capacity that tie AI infrastructure together.
Amphenol is about 3.0× larger than Ciena by market cap; Amphenol trades at the lower P/E (43.8 vs 148.8); year to date, Ciena leads (+97.0% vs +17.7%).
Side by side
| APH | CIEN | |
|---|---|---|
| Market cap | $196B | $65.2B |
| Price | $159.06 | $460.72 |
| Today | −2.0% | −0.4% |
| Return YTD | +17.7% | +97.0% |
| Return 1Y | +61.8% | +487.3% |
| P/E | 43.8 | 148.8 |
| P/S | 7.6 | 11.7 |
| P/B | 14.0 | 22.5 |
Data as of 2026-07-11 · updates daily after U.S. close
The two companies
AmphenolAPH
Interconnect technology, cables and sensors; a key supplier of high-speed interconnect for AI servers and data centers.
Full APH profile →CienaCIEN
Leading in long-distance optical transmission — connecting data centers with each other (data center interconnect).
Full CIEN profile →More comparisons in Data centers
See where APH and CIEN sit in the full AI & digital infrastructure map — every segment from suppliers to end markets.Open the AI value chain →