At roughly 70.8 times trailing twelve-month sales, AST SpaceMobile (NASDAQ: ASTS) carries a valuation that implies a revenue trajectory the company has yet to demonstrate it can deliver.

For context, the S&P 500 trades at approximately 3.2 times sales, highlighting just how much optimism is baked into ASTS at current prices.

That premium exists despite a brutal 2026 for shareholders, with the stock down 59.2% between February 13 and November 10, a stretch during which the S&P 500 returned 10.9%.

Satellite competitors including Globalstar, Iridium Communications, and Viasat each posted gains over that same period, making ASTS’s underperformance stand out even within its own sector.

The company’s balance sheet has shifted dramatically over the past year, moving from a net cash position to meaningful net debt as spending ambitions have expanded.

Total debt stood at $4.12 billion as of September 30, 2026, compared with just $722 million twelve months earlier, a jump driven in part by $1.15 billion in convertible notes sold in July.

Cash on hand rose to $2.80 billion, leaving net debt of $1.32 billion, a reversal from a year ago when $1.20 billion in cash comfortably exceeded the then-modest debt load.

The debt raise helped fund an announcement on November 6 that the company would develop its own rocket, named Blacklift, a project management expects will require several hundred million dollars in additional capital spending during 2027 alone.

Near-term spending is already climbing, with management guiding fourth-quarter 2026 capital expenditure to between $400 million and $500 million, up from approximately $310 million in the third quarter, which itself came in below guidance due to the timing of launch payments.

Partially offsetting that outlay, the company secured $1 billion in Japanese government funding through its joint venture with Rakuten, directed at manufacturing and launching satellites, with most of those funds expected to arrive during 2027.

On the revenue side, third-quarter 2026 results showed $42.3 million in sales, a 187.1% increase year-over-year that nonetheless remains small relative to the company’s cost structure.

Free cash flow for the quarter was negative $483 million, worsening from negative $331 million a year earlier, meaning cash outflows grew by roughly $152 million while revenue added only about $27.6 million.

Over the trailing twelve months through September, the company burned $1.89 billion in free cash flow against total revenue of just $143 million.

Management held its full-year 2026 revenue guidance at $150 million to $200 million during a November 9 earnings call, noting that recent contract signings could provide some upside.

With $88.5 million recognized through the first nine months of the year, the company needs at least $61.5 million in the fourth quarter simply to reach the bottom of that range.

The longer-term anchor for the bull case is management’s projection of revenue approaching $1 billion in the twelve months following the start of commercial service, though executives declined to offer any other forward revenue guidance.

Nationwide intermittent service in the United States is targeted before year-end 2026, with user beta trials planned for early 2027, but management stopped short of confirming whether that launch event marks the starting point for the $1 billion revenue clock.

That ambiguity leaves investors unable to fully assess when, or whether, the company’s spending commitments will be matched by the revenue growth its valuation assumes.