Iridium Communicationsvs.Rocket Lab
IRDM vs RKLB · both in Space industry & satellites, part of the Defense, security & space value chain: Launch, satellite communications and space systems — civil and military.
Rocket Lab is about 9.2× larger than Iridium Communications by market cap; year to date, Iridium Communications leads (+188.0% vs +16.2%).
Side by side
| IRDM | RKLB | |
|---|---|---|
| Market cap | $5.3B | $48.5B |
| Price | $50.06 | $81.04 |
| Today | −1.1% | −1.8% |
| Return YTD | +188.0% | +16.2% |
| Return 1Y | +56.1% | +107.3% |
| P/E | 49.8 | — |
| P/S | 6.0 | 71.3 |
| P/B | 11.2 | 21.4 |
Data as of 2026-07-11 · updates daily after U.S. close
The two companies
Iridium CommunicationsIRDM
Operates a global satellite network for communications — coverage everywhere on earth for shipping, defense and IoT.
Full IRDM profile →Rocket LabRKLB
Launch company and space systems provider — small-lift rockets (Electron), an upcoming larger rocket (Neutron) and satellite components.
Full RKLB profile →More comparisons in Space industry & satellites
See where IRDM and RKLB sit in the full Defense, security & space map — every segment from suppliers to end markets.Open the Defense value chain →