York Space Systems: short this unprofitable space stock

York Space Systems is a play on a booming sector – but it looks doomed and is absurdly overvalued, says Matthew Partridge

York Space Systems logo displayed on a smartphone screen
(Image credit: Thomas Fuller/SOPA Images/LightRocket via Getty Images)

The space industry is booming. The falling cost of satellites and launches has stimulated great interest from both the private sector and the military users, while the imminent flotation of Elon Musk's SpaceX has also put the sector in the spotlight. Still, as with any boom, not every company will prosper, and this is particularly true if its core business is a competitor of SpaceX. A case in point is York Space Systems (NYSE: YSS), which went public at the end of January 2026.

At present, York Space Systems makes its money from selling satellites. The problem is that it makes virtually all of its revenue from just one client, the Space Development Agency (SDA), part of the US Space Force (the space branch of the US Armed Forces).

Try 6 free issues of MoneyWeek today

Get unparalleled financial insight, analysis and expert opinion you can profit from.

Start your trial
https://cdn.mos.cms.futurecdn.net/flexiimages/mw70aro6gl1676370748.jpg

Sign up for MoneyWeek’s free twice-daily newsletter.

Join more than 165,000 subscribers and keep yourself informed with latest financial news, insights and expert analysis to help you understand what really matters when it comes to your finances.

Join more than 165,000 subscribers and keep yourself informed with latest financial news, insights and expert analysis to help you understand what really matters when it comes to your finances.

Sign up
Dr Matthew Partridge
MoneyWeek Shares editor