Due Diligence Capital Notes

On February 10, 2026, a satellite the size of a city bus unfolded a communications antenna roughly the size of a tennis court in low Earth orbit. It was the largest commercial communications array ever deployed in space. The company behind it — AST SpaceMobile (ASTS) — reported 2025 revenues of somewhere between $63 million and $71 million. Its operating expenses for the same year ran between $355 million and $363 million. In other words, it is burning through roughly five dollars in costs for every one dollar it earns.

So why did the bond market just hand it another billion dollars?

That question is worth sitting with. Because the answer tells you nearly everything you need to know about what ASTS is actually building, how it intends to fund the build-out, and what could still go catastrophically wrong along the way.

What Just Happened: The Capital Raise Explained

On February 11, 2026, ASTS filed a Form 424B5 prospectus supplement with the SEC announcing two simultaneous transactions: a registered direct equity placement (selling new shares directly to institutional investors at a fixed price, bypassing the open market) and a $1 billion convertible note offering — with an overallotment option that lets the initial purchasers buy up to an additional $150 million. Both deals closed concurrently.

A convertible note is a form of debt that pays interest like a bond but gives the lender the option to convert their principal into company stock at a predetermined price rather than being repaid in cash. It sits in the middle of the capital structure: safer than equity in a bankruptcy, but with equity-like upside if the stock runs. For capital-hungry pre-revenue companies, it is an elegant instrument — borrowers get long-duration financing without immediately handing over ownership, and lenders get downside protection plus a call option on the upside.

The new notes — due 2036, giving ASTS a full decade of runway — join a growing stack of convertible debt already on the balance sheet:

$1.15 billion in 2.00% convertible notes maturing January 2036, convertible into shares at approximately $96.30 per share
$575 million in 2.375% convertible notes maturing 2032
$50 million in 4.25% convertible notes maturing 2032

Add the new $1 billion (plus potential overallotment), and ASTS has constructed one of the more ambitious pre-commercial debt structures in recent satellite industry history. Total consolidated indebtedness as of December 31, 2025, stood at approximately $2.264 billion. Against that sits roughly $2.780 billion in cash and restricted cash — so the company has more liquidity than debt, for now. But the clock is ticking on the burn rate.

Why Capital Markets Are Willing to Participate

Here is the core tension: investors — both equity and bond — are putting money into a company that loses hundreds of millions of dollars per year. What are they seeing that makes this rational?

The answer is infrastructure economics. ASTS is not building a product you ship in a box. It is building a network — specifically, what it describes in its own SEC filing as "the first and only global Cellular Broadband network in space to be accessible directly by everyday smartphones (2G/4G-LTE/5G devices)." No new devices. No satellite dish. Your existing phone connects directly to a BlueBird satellite orbiting at roughly 700 kilometers above Earth.

Infrastructure businesses have a specific financial shape: enormous upfront capital investment, years of losses, then a step-function shift to profitability once the network reaches critical mass. The question is always whether the company can survive long enough to reach that inflection point.

The commercial logic, on paper, is striking:

Over 50 Mobile Network Operator (MNO) partnerships have been signed, covering nearly 3 billion potential subscribers globally. These are carriers — AT&T, Verizon, Rakuten, Vodafone, and others — who have agreed to a revenue-sharing model that lets them extend coverage into areas where building cell towers is economically impossible.
No new hardware required for end users. This is a distribution moat. The addressable market is every person already carrying a smartphone.
The revenue model is wholesale, not retail. ASTS does not acquire subscribers directly. It sells capacity to MNOs who already have billing relationships with hundreds of millions of customers.

None of this generates meaningful revenue today. But it does explain why sophisticated institutional capital keeps showing up.

The BlueBird 6 Milestone and the Constellation Roadmap

The February 10 deployment of BlueBird 6's antenna is not just a press-release moment. It is a meaningful technical proof point.

As the filing states: "BlueBird 6 features the largest commercial communications array antenna ever deployed in Low Earth Orbit. Spanning approximately 2,400 square feet, the satellite is engineered to support peak data speeds of up to 120 Mbps with plans to deliver up to ten times the bandwidth capacity of the BlueBird 1-5 series."

Ten times the bandwidth of the first generation. That is the difference between a system that can offer occasional connectivity in rural gaps and one that can start handling real commercial traffic loads.

BlueBird 6 launched December 23, 2025. The fact that it unfolded successfully — a mechanically complex operation involving a large phased-array antenna deploying in the vacuum of space — matters because it validates the Block 2 design before the company commits to launching 45 to 60 more of them.

The constellation math is straightforward:

25 satellites — sufficient for noncontinuous, intermittent service
45–60 satellites — continuous coverage in priority markets (U.S., Europe, Japan) — target: end of 2026
~90 satellites — full global continuous service

Block 2 satellites cost an estimated $21 million to $23 million each in capital costs, excluding validation satellites. At 60 satellites, that is roughly $1.26 billion to $1.38 billion in hardware alone, before launch costs. This is why a $1 billion raise in one quarter is not extravagant — it is barely sufficient.

The Full Capital Stack: ATM, Debt, and Spectrum

The convertible note offering sits inside a much larger financing architecture that is worth understanding in full.

The ATM Program — short for At-The-Market, meaning the company sells newly issued shares gradually into open-market trading rather than via a traditional large block offering — generated approximately $706.3 million in net proceeds from roughly 10.1 million shares sold as of early 2026, leaving about $80 million of the original $800 million facility still available. ATM proceeds go directly to funding operations and satellite construction.

The Ligado Spectrum Transaction is the most structurally unusual element. ASTS committed $550 million total to acquire rights to up to 45 MHz of lower mid-band U.S. spectrum through the Ligado bankruptcy proceedings, with $420 million already disbursed in October 2025. A UBS cash-collateralized term loan of $420 million and a Sound Point Credit Facility — a $550 million delayed-draw, non-recourse credit line — were structured specifically to backstop this acquisition. Lower mid-band spectrum (think 1–3 GHz range) propagates well indoors and over long distances, making it ideal for direct-to-device satellite use. Owning this spectrum, rather than leasing it, would give ASTS a regulatory and competitive moat in the U.S. market.

As of year-end 2025, gross capitalized property and equipment stood at approximately $1.6 billion, with accumulated depreciation and amortization of roughly $174 million — a balance sheet that is mostly satellites and spectrum, not traditional fixed assets.

The intended uses of the new $1 billion in proceeds, as stated in the filing, include "accelerating the deployment of our controlled spectrum bands on a global basis, monetizing the capabilities of our proprietary technology to capture the evolving commercial opportunities related to artificial intelligence, enhancing investment in government space opportunities in the U.S., reducing higher interest debt, and pursuing opportunistic investments."

That is a wide mandate — which is typical for a company in rapid pre-commercial buildout where capital deployment needs to remain flexible.

What Could Break This Thesis

Let me be direct about the ways this goes wrong.

The burn rate exceeds the fundraising runway. With 2025 revenues of $63M–$71M against operating expenses of $355M–$363M, the company is consuming capital at a rate that requires near-constant market access. If equity markets turn, credit spreads widen, or investor appetite for pre-revenue satellite companies cools — for any reason — ASTS's ability to raise at acceptable terms could evaporate. The filing itself warns that failure to raise additional funds could force the cancellation of launch agreements and trigger significant termination penalties.
The Ligado spectrum deal collapses. The $550 million spectrum acquisition cleared a Delaware bankruptcy court, but Inmarsat is actively contesting it in U.S. District Court. If that ruling is reversed, ASTS could lose access to 45 MHz of critical U.S. spectrum with $420 million already spent and potentially unrecoverable. This is not a remote tail risk — it is active litigation.
Satellite deployment runs behind schedule. The plan to launch 45–60 Block 2 BlueBird satellites by the end of 2026 depends on assembly timelines, multiple regulatory approvals, launch vehicle availability, and orbital slot coordination. Any significant delay in hitting the 45-satellite threshold pushes continuous commercial service out further, extending the loss period and stressing liquidity.
Dilution compounds faster than value creation. The convertible note stack, layered on top of the ATM program and existing conversion rights, represents tens of millions of potential new shares. If the stock price stagnates or declines, conversion economics become unfavorable, but the debt obligations remain. At a share price of roughly $96.27 on February 10, 2026 — notably close to the ~$96.30 conversion price on the $1.15 billion in existing 2.00% notes — the margin for error between accretive and dilutive conversion is thin.

Conclusion

What ASTS is attempting has no real precedent at this scale. Building a space-based cellular network capable of reaching standard smartphones globally, through partnerships with over 50 carriers representing nearly 3 billion subscribers, while funding the build-out through convertible debt and equity issuances — it is an audacious capital allocation strategy wedded to a genuinely novel engineering challenge.

The February 10 unfolding of BlueBird 6's 2,400 square-foot antenna, and the $1 billion capital raise that followed the next day, are the two most important data points for evaluating whether 2026 will be the year ASTS transitions from "interesting concept" to "operating network." The 45-to-60-satellite threshold for continuous commercial service in the U.S., Europe, and Japan is the number I am watching. Everything else — the revenue model, the MNO agreements, the spectrum rights — sits dormant until the constellation is dense enough to actually deliver service.

The question worth asking by year-end: is ASTS carrying $2.7 billion in cash because it is well-capitalized, or because it needs every dollar of it to survive long enough to matter? The answer, I suspect, is both.