Due Diligence Capital Notes

Imagine handing someone $67.76 and being told, immediately and in writing, that what you just received is worth $6.95. That is not a typo or a thought experiment — it is the arithmetic that AST SpaceMobile disclosed to prospective investors in its October 2025 equity offering prospectus. New buyers coming in at the prevailing stock price of $67.76 faced $60.81 per share in what the filing calls "immediate dilution" — the gap between what they paid and the company's adjusted net tangible book value after the raise.

So why are institutional banks lining up to sell it? Why would sophisticated investors absorb that gap? The answer lives somewhere in the intersection of satellite physics, mobile telecom economics, and a genuinely unusual bet on what a global, space-based cellular network might be worth once it is actually built. Let me walk through the mechanics.

What Is an At-The-Market Offering, and Why Use One Here?

An at-the-market equity offering, or ATM, is a structure where a company sells newly issued shares directly into the open market over time, rather than dumping a fixed block on investors in a single transaction. Instead of pricing a deal one night and waking up to a 10% gap-down the next morning, the company sells gradually — day by day, hour by hour — at whatever the current market price happens to be. It is slower and quieter, but it avoids the brutal "offering discount" that traditional secondaries typically require.

AST SpaceMobile filed a Form 424B5 prospectus supplement on October 7, 2025 (you can read the full filing at SEC EDGAR) authorizing up to $800 million in Class A Common Stock to be sold through ten banking agents — including Barclays, Bank of America, Deutsche Bank, UBS, and Cantor Fitzgerald. The sales agreement runs through October 7, 2028. Agents earn a commission of up to 3.0% of gross sales proceeds, leaving the company with estimated net proceeds of roughly $787.5 million once fees and expenses are stripped out.

The ATM structure matters here for a specific reason: ASTS stock is volatile. Using a slow-drip offering lets the company capture elevated prices during momentum periods without locking in a single price on a single bad day. It is the same playbook Strategy uses with its Bitcoin accumulation — and the logic is analogous. Sell high, deploy the capital into hard assets, repeat.

The BlueBird Constellation: How the Business Actually Works

Before getting into the capital structure, it is worth understanding exactly what ASTS is building, because the financial engineering only makes sense in that context.

AST SpaceMobile is developing what the company describes as "the first and only global Cellular Broadband network in space to be accessible directly by everyday smartphones (2G/4G-LTE/5G devices) for commercial use." The key phrase is directly by everyday smartphones. No special hardware. No satellite phone. Your existing device, already in your pocket.

The company's BlueBird (BB) satellites operate in low Earth orbit (LEO) — the same altitude band used by Starlink — but with a fundamentally different business model. Starlink sells subscriptions directly to end users and ships them a dish. ASTS sells connectivity capacity to mobile network operators (MNOs) — carriers like AT&T, Verizon, Vodafone, Rakuten — who then offer it as an extension of their existing service plans. The end user never interacts with ASTS directly. Revenue flows through revenue-sharing agreements with those carrier partners.

This is elegant in theory and fragile in practice, which is something I will return to in the risk section. But the commercial logic is sound: ASTS does not need to acquire millions of individual subscribers. It needs to close deals with a handful of large carriers who already have them.

The Constellation Ladder

The business does not turn on overnight. It scales in stages, and the financial projections are anchored to specific satellite counts:

25 satellites (5 Block 1 + 20 Block 2): The minimum threshold for non-continuous SpaceMobile service in selected markets. This is the critical near-term milestone. The company's own prospectus states: "We believe the operation of a constellation of 25 BB satellites will enable us to potentially generate cash flows from operating activities to further support the buildup of the remaining constellation." Twenty-five satellites is the point where the business could begin to fund itself.
45–60 satellites: The threshold for continuous coverage in key markets — the United States, Europe, and Japan. This is where a carrier can actually market the service as reliable rather than opportunistic.
~90 satellites: Full coverage across all targeted markets globally.

The $800 million raise is designed to get the company meaningfully toward that first threshold of 25, and potentially beyond. But it is important to be honest about what "beyond" requires — more capital, more launches, more time.

The Full Capital Stack

The ATM offering does not exist in isolation. To understand the dilution math, you need to see the entire picture of what is already outstanding.

As of October 3, 2025, the share count breaks down like this:

Class A shares outstanding: 272,079,386
Class B shares outstanding: 11,227,292
Class C shares outstanding: 78,163,078
AST LLC Common Units (redeemable one-for-one into Class A shares): 89,390,370
Incentive plan shares (RSUs and options): 13,545,967

After the full $800 million ATM offering, the illustrative Class A total rises to approximately 283,885,761 — representing roughly 11.8 million new shares issued at the $67.76 reference price. That sounds modest. But the fuller picture includes:

$460 million in 4.25% senior convertible notes due 2032, issued January 27, 2025, which are convertible into 17,044,610 Class A shares. A convertible note is a bond that can be exchanged for equity at a preset price — so if the stock rises enough, bondholders convert rather than wait for cash repayment. The 4.25% coupon is not zero like some of Strategy's instruments, but it is well below what you would normally demand for lending to a pre-revenue space company.
Private Placement Warrants covering 3,053,132 additional Class A shares.
Penny Warrants issued to Ligado Networks as part of a pending transaction — 4,714,226 shares exercisable at $0.01 per share. These are essentially free equity for Ligado, issued as consideration in a spectrum or infrastructure deal.

Add all of this together and the fully diluted share count is meaningfully larger than the headline numbers suggest. The net tangible book value — total assets minus intangible assets and liabilities, divided by shares outstanding — stood at just $4.14 per share as of June 30, 2025. After the full $800 million raise, that number adjusts to approximately $6.95 per share. Against a market price of $67.76, that still leaves new investors holding paper that is worth roughly a tenth of what they paid on a book-value basis. The prospectus itself states it plainly: "Because we will incur much of the costs and expenses from these efforts before we receive any revenues with respect to the SpaceMobile Service, our losses in future periods will be significant."

This is not a company with a valuation problem. It is a company with a timing problem — and those two things feel identical until they suddenly do not.

Why the Premium Exists at All

The stock trading at roughly 16 times book value is not irrational if you believe the constellation gets built, the carrier partnerships hold, and the revenue model scales. Let me be clear: I am not asserting those things will happen. But the market is pricing in a probability-weighted version of a world where ASTS captures a slice of the enormous global roaming and coverage gap market that no terrestrial carrier can economically address.

There are approximately 5 billion smartphone users on Earth. A meaningful fraction of them travel to, live in, or work in areas with no tower coverage. Every one of those moments of dead signal is addressable, in theory, by a satellite network that their existing phone can reach without modification. Carrier partners have both the incentive and the subscriber relationship to monetize that. ASTS just needs to build the infrastructure.

The ten banking agents listed in the Sales Agreement are not selling a lottery ticket. They are selling a call option on a network that, if it reaches 45–60 satellites, becomes a piece of critical global infrastructure with pricing power derived from the fact that there is no competitive equivalent. That is the premium. Whether it is this premium — 16x book — is the debate.

What Could Break This Thesis

None of the above changes the fact that there are at least four distinct ways this investment goes badly wrong.

Valuation-to-book compression. New investors absorb $60.81 per share in immediate dilution the moment they participate. If any significant operational setback — a launch delay, a Block 2 satellite anomaly, a carrier relationship falling through — hits sentiment, the stock does not need to go to zero to cause severe losses. A repricing from $67 to $30 wipes out 55% of capital. That is the nature of a 16x-book asset in a pre-revenue phase.

Pre-revenue capital dependency. The $800 million ATM and the $460 million in convertible notes are not enough to fully deploy a 90-satellite constellation. The company's own disclosures acknowledge the need for "substantial additional capital." If equity markets sour on speculative growth names between now and when the next raise is needed, ASTS could face a dilutive capital raise at far lower prices — or worse, an inability to raise at all.

Satellite execution risk. Block 2 BlueBird satellites are large, technically complex spacecraft. The history of satellite manufacturing is a history of schedule slippage and cost overruns. A single failed launch or an on-orbit anomaly does not just delay revenue — it extends the cash-burn runway at a time when the company has no operating income to buffer against.

MNO partnership concentration. The entire revenue model depends on carriers choosing to actively market SpaceMobile connectivity to their subscribers. These partners have no contractual obligation to prioritize ASTS service over competing terrestrial coverage improvements. If a major carrier deprioritizes the rollout — because of internal politics, a competing satellite deal, or regulatory complications — ASTS has no direct-to-consumer fallback.

The 25-Satellite Inflection Point

Here is what I keep coming back to: the company's own language identifies 25 operational BlueBird satellites as the threshold where cash flows from operations could begin. Not will — could. But that is a specific, falsifiable claim. It means the investment thesis has a checkable milestone, not an endless horizon.

If ASTS reaches 25 operational satellites, begins generating measurable revenue-share cash flows, and demonstrates that the carrier economics hold at the unit level, the entire risk profile of the story changes. It transitions from "pre-revenue infrastructure bet" to "early-stage cash-generating network" — and those two categories attract very different pools of capital at very different multiples.

The $800 million ATM is the mechanism for getting there without a single catastrophic dilution event. The irony is that the offering designed to protect existing shareholders is also the one that exposes new investors to the steepest near-term book-value gap. That tension is not unique to ASTS — it is the defining characteristic of any capital-intensive infrastructure business trying to cross the chasm between deployment and monetization. The question is whether you are willing to sit through the construction noise to see what the network looks like once it is built.