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 8.1× larger than Iridium Communications by market cap; year to date, Iridium Communications leads (+178.3% vs +3.1%).
Side by side
| IRDM | RKLB | |
|---|---|---|
| Market cap | $5B | $40.9B |
| Price | $47.56 | $68.40 |
| Today | −1.7% | −4.9% |
| Return YTD | +178.3% | +3.1% |
| Return 1Y | +149.0% | +16.9% |
| Since June 26, 2026 | +9.3% | −19.1% |
| P/E | 54.0 | — |
| P/S | 5.7 | 53.2 |
| P/B | 10.7 | 11.7 |
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
Iridium CommunicationsIRDM
Global coverage is the whole proposition. Iridium's network reaches every point on earth, from ships at sea to IoT sensors, with defense among its customers.
Full IRDM profile →Rocket LabRKLB
Electron puts small payloads in orbit today; the larger Neutron is still in development. Rocket Lab also sells satellite platforms and components to other operators.
Full RKLB profile →More IRDM & RKLB comparisons
Other head-to-heads in the Space industry & satellites segment.