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 3.3× larger than Ciena by market cap; Amphenol trades at the lower P/E (40.4 vs 143.0); year to date, Ciena leads (+59.0% vs +15.1%).
Side by side
| APH | CIEN | |
|---|---|---|
| Market cap | $208B | $62.7B |
| Price | $158.78 | $387.66 |
| Today | +2.1% | +4.2% |
| Return YTD | +15.1% | +59.0% |
| Return 1Y | +42.2% | +314.2% |
| P/E | 40.4 | 143.0 |
| P/S | 7.2 | 11.3 |
| P/B | 13.4 | 21.7 |
Data as of 2026-08-26 · updates daily after U.S. close
The two companies
AmphenolAPH
Interconnect hardware: connectors and cable, plus a sensor business. The high-speed parts end up in AI servers and data center gear.
Full APH profile →More APH & CIEN comparisons
Other head-to-heads in the Data centers segment.
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 →