Space stocks are easy to get excited about and hard to value. Each of these three companies has a compelling story, but each also has a question that will shape what shareholders earn. Looking at the question each one has to answer is a useful way to judge how much risk comes with the story.
All three are burning cash, and all three trade at premium multiples that assume revenue and profit will ramp up. The difference is what stands between each company and that outcome.
AST SpaceMobile (ASTS): Can It Turn a Network Into Revenue?
AST SpaceMobile is building a satellite-based cellular network meant to connect ordinary smartphones directly to satellites through existing mobile operators. It has partnerships with operators serving more than 3 billion subscribers. What it doesn’t have yet is recognized revenue from the service itself. Its fiscal second-quarter revenue was just $31.5 million.
Management says it needs 45 to 60 operating BlueBird satellites to provide continuous service across key markets such as the U.S., Europe, and Japan, and believes it has funding to build and launch about 90. The company burned roughly $1 billion in free cash flow in the first half of 2026, mostly on satellite components and supporting infrastructure.
Deploying the network is only part of the job. AST must also earn enough recurring revenue to cover costs and deliver a return, and it is unclear how many subscribers will actually use the service. Only 6.6% of its $1.2 billion in remaining performance obligations is expected to become revenue by June 2027.
The shares trade near $31, down about 12% on the day, with a market cap near $10.7 billion. At 101.8 times trailing sales, it is the most expensive of the three, and the company expects $150 million to $200 million in 2026 revenue.
SpaceX (SPCX): Can AI Spending Earn Its Keep?
SpaceX has three businesses: Space, which makes and launches reusable rockets, Connectivity, which runs the Starlink satellite internet service, and Super Intelligence, the former AI unit. It reported about $14.6 billion in third-quarter revenue, and more than half came from Super Intelligence.
Starlink is where the profit is. Connectivity earned $2.37 billion in operating profit in the quarter, versus $431 million for Super Intelligence. Yet the AI unit drove about $40 billion of the company’s $48.1 billion in capital spending in the first nine months of the year. Operating cash flow was $13.1 billion, and free cash flow was negative by nearly $35 billion.
One unidentified Super Intelligence customer made up 34.5% of third-quarter revenue, about two-thirds of that segment. So future cash generation depends heavily on that customer’s decisions. SpaceX has to show its AI investment can produce attractive returns.
Shares trade near $125, down about 8% on the day, with a market cap near $1.85 trillion, or about 57 times trailing sales.
Rocket Lab (RKLB): Can Acquisition Growth Beat the Dilution?
Rocket Lab earned $234 million in fiscal second-quarter revenue, mainly from Space Systems, which builds spacecraft and satellite components. Its Launch Services unit sends satellites and other payloads into orbit. A backlog of $2.36 billion gives some visibility, with 45.5% expected to convert to revenue by June 2027.
The company is also pursuing the acquisition of Iridium Communications, an established satellite-services business that reported $245.7 million of third-quarter revenue, 76% from services. To help pay, Rocket Lab raised $1.94 billion in September by issuing 29.3 million shares, and Iridium’s roughly $1.78 billion of term loans will stay outstanding after the deal.
So the test is whether added cash flow outweighs the dilution and debt. Rocket Lab also must turn free cash flow positive, since it burned about $188 million in the first half of 2026, and its next-generation Neutron rocket has been pushed to 2027.
Shares trade near $47, with a market cap of roughly $31.3 billion, about 40.8 times trailing sales. The source calls it the best risk-reward of the three, though the valuation is rich.
