Leaderboard › Industry total › Defense space
Largest defense space companies by market cap
Companies whose main business is national-security satellites: 1 listed space pure play, it is priced from a US exchange listing. Its market cap is US$1.2B, as of Oct 2, 2026 close.
Defense space
as of Oct 2, 2026End of day| Tickers | |||||
|---|---|---|---|---|---|
| 1York Space Systems, Inc.Priced on NYSE (YSS) | YSS | Defense space | US$8.975 | ▲ +4.4% | US$1.2B |
, as of . The 1-day change is against the previous close.Market cap = shares outstanding (every class, counted once) × the last sale on the US listing (live while exchanges are open, the latest close otherwise) × the Bank of Canada rate.Methodology. Partial players are ranked separately and never enter these totals.
Other segments
- Launch
- Satellite communications
- Earth observation and data
- Infrastructure and in-space services
- Components and ground
Every pure play together: the leaderboard. All segments added up, with and without the largest company, and the total over time: space industry market cap.