Due Diligence Capital Notes

There is a moment in the lifecycle of a technology company when the capital markets stop asking "does this work?" and start asking "how big can this get?" For AST SpaceMobile, that moment appears to have arrived. In October 2025, the company closed a combined $1.16 billion capital raise — $161 million in new equity and up to $1.15 billion in convertible notes — without a dollar of commercial revenue from its flagship SpaceMobile service yet on the books. Bond investors accepted a 2.00% annual coupon on a ten-year note from a company still deep in build-out mode. Equity investors paid $78.61 per share. Nobody blinked.

How does that happen? The answer lies in what ASTS is actually building: a constellation of low-earth-orbit satellites capable of beaming 4G-LTE and 5G service directly to ordinary smartphones — no specialized hardware, no dedicated terminal, no cell tower anywhere in range. If it scales commercially, the addressable market is every person on earth who carries a phone. That is the bet the capital markets are pricing in, and this post is about the specific financial mechanics that got us here.

What Is a Dual Capital Raise, and Why Does It Matter?

A registered direct offering is the most straightforward form of equity raise: the company sells a fixed number of shares at a fixed price directly to a specific set of institutional investors, bypassing the public market entirely. ASTS sold 2,048,849 Class A shares at $78.61 apiece, raising roughly $161 million gross. The price is set by negotiation — in practice, a modest discount to the market price that makes it attractive enough for institutional buyers to commit immediately.

At the same time, ASTS ran a concurrent offering of convertible senior notes — essentially corporate bonds that pay interest but include an embedded option for the bondholder to swap that debt into ASTS common stock at a predetermined price. The conversion rate here is 10.3845 shares per $1,000 in principal, implying a conversion price of roughly $96.30 per share — a 22.5% premium to where the stock was trading when the deal was signed. Investors accepted a below-market 2.00% coupon because the conversion option gives them equity-like upside if the stock climbs above $96.30 over the next decade. They are, in effect, trading yield for optionality.

The strategic logic of doing both simultaneously is worth pausing on. The equity placement raised just enough cash — roughly $160 million net — to retire $50 million in principal of the older, far more expensive 4.25% convertible notes. Those older notes had already caused significant pain earlier in 2025: ASTS repurchased $360 million of principal from that same series for approximately $849.8 million in cash across two tranches. That is a more than two-to-one premium — a measure of how much dilution pressure had built up. The new 2.00% notes, by contrast, carry a lower coupon and a higher conversion price, meaning the company's future dilution is more controlled if the stock continues its trajectory upward.

The Moving Parts: How $1.16 Billion Gets Deployed

Understanding where all this money goes requires mapping the constellation build-out and the spectrum acquisition underneath it.

The BlueBird Constellation — ASTS's satellite design is called BlueBird (BB). The 424B5 prospectus filed October 21, 2025 estimates average capital costs for a 90-satellite Block 2 constellation at approximately $21 million to $23 million per satellite, including materials and launch. "Initial launches [are] higher than that range and trending down over time as we optimize payloads and launch terms," the filing notes. At the midpoint of $22 million, 90 satellites cost roughly $1.98 billion in hardware and launches alone — before ground infrastructure, spectrum fees, or operating losses during build-out. The coverage milestones are graduated: 25 BlueBird satellites (5 Block 1 already in orbit, plus 20 Block 2) deliver noncontinuous service, meaning a phone connects when a satellite passes overhead. At 45–60 satellites, ASTS targets continuous coverage across the continental United States, Europe, and Japan. At 90, the network reaches full global coverage. Each milestone unlocks a new tier of carrier revenue.
The Ligado Spectrum Acquisition — Spectrum — the licensed radio frequencies over which wireless signals travel — is the invisible infrastructure of any cellular network. ASTS secured access to up to 45 MHz of lower mid-band spectrum in the United States through a bankruptcy court-approved transaction with Ligado Networks, with the court approval coming on June 23, 2025. The total cash consideration is $550 million across three payments: $420 million due October 31, 2025; $100 million due March 31, 2026; and a final $30 million at or after formal closing. Ligado also received 4,714,226 penny warrants — options exercisable at $0.01 per share, essentially free equity — as part of the deal. Mid-band spectrum is particularly valuable because it balances coverage area with data throughput; it is the same frequency band driving much of the terrestrial 5G rollout. Getting court-approved access to 45 MHz of it is a competitive moat that would be very difficult for any new entrant to replicate.
The Sound Point Credit Facility — To fund the $550 million Ligado payment without exhausting the public capital raise, ASTS arranged a $550 million non-recourse senior-secured delayed-draw term loan at the AST LLC subsidiary level. "Non-recourse" means lenders can only pursue the subsidiary's assets for repayment — the parent company is not liable. "Delayed-draw" means funds can be pulled in tranches over time rather than all at once. This structure isolates credit risk from the parent and gives management flexibility on timing.
The Verizon Commercial Agreement — On October 8, 2025, ASTS signed a definitive commercial agreement with Verizon to deliver direct-to-cellular SpaceMobile service across the continental United States, with service starting in 2026. A definitive commercial agreement is not a letter of intent — it is a binding contract. Verizon is the second-largest U.S. wireless carrier. The existence of a signed deal is a large part of what made bond investors willing to accept 2.00% on a ten-year note.
The ATM Program as a Continuous Lever — In addition to the registered direct offering, ASTS runs an ATM (At-The-Market) program, which lets the company gradually sell shares into the open market at prevailing prices without announcing a formal offering each time. The current ATM program, authorized in October 2025, has a total authorized capacity of $800 million. As of October 20, 2025, it had already raised approximately $277.4 million net through roughly 3.2 million shares. The ATM is a low-friction, continuous funding tool to top up the balance sheet between larger capital raises — think of it as a slow drip rather than a fire hose.

The Numbers After the Dust Settles

After accounting for all of the above, here is the balance sheet picture as filed in the AST SpaceMobile 424B5 Prospectus Supplement on SEC EDGAR:

Cash and restricted cash as of September 30, 2025: approximately $1,220.1 million
Total consolidated debt as of September 30, 2025: approximately $724.4 million
Class A shares outstanding after the October placement: 252,560,668
2.375% Convertible Notes issued July 2025: $575 million principal, due October 2032
New 2.00% Convertible Notes: $1 billion principal, due January 2036 (plus up to $150 million if the overallotment option is exercised)
Remaining 4.25% Convertible Notes: $100 million principal before this offering's partial repurchase

The net proceeds from the convertible notes — approximately $981.9 million, or roughly $1.13 billion if the overallotment is exercised — are earmarked, per the prospectus, for "general corporate purposes, including without limitation funding the deployment of our worldwide constellation of satellites in anticipation of adding incremental strategic markets for our SpaceMobile Service."

One structural detail worth highlighting: alongside the July 2025 convertible notes, ASTS purchased capped calls — an options strategy that offsets the dilutive effect of note conversions up to a stock price cap — for roughly $54 million. The cap price is $120.12 per share. This means that if the stock rises between the $96.30 conversion price and $120.12, the capped calls neutralize most of the dilution. Above $120.12, new shares start to hit the float again. The company is actively trying to manage the equity dilution from its own debt, which is a meaningful sign of capital discipline.

What Could Break This Thesis

Conviction-driven investing means naming the failure modes explicitly, not burying them.

The capital well runs dry before the constellation does. At $21–23 million per satellite, 90 BlueBirds cost roughly $2 billion in hardware and launches alone. Add $550 million for Ligado spectrum, ground infrastructure buildout, and sustained operating losses, and the total capital requirement far exceeds this single offering. If equity market sentiment toward ASTS deteriorates — whether broadly or company-specifically — the ATM program dries up, future convertible note offerings price at far worse terms, and the build schedule could slip or partially unwind. The filing itself warns that failure to secure additional funds could force cancellation of launch agreements and trigger material termination fees.
Dilution compounds faster than the stock price. Today there are 252.6 million Class A shares outstanding. The three tranches of convertible notes (4.25%, 2.375%, and 2.00%) can collectively convert into up to approximately 27.6 million additional shares. The ATM can issue hundreds of millions more. Ligado's 4.7 million penny warrants are essentially free shares at $0.01 exercise price. Stock-based compensation adds more on top. If the stock drifts lower over several years while satellites take longer than expected to launch, all of this converts at worse terms for existing holders.
Ligado spectrum execution stalls. The $420 million payment to Ligado due October 31, 2025 is contractually committed. The Sound Point credit facility that funds much of it is itself conditional on completing the regulatory approvals accompanying the spectrum transfer. If those approvals face legal challenge or regulatory delay, ASTS could find itself committed to a $550 million purchase with its credit facility unavailable — forcing a return to equity markets at a potentially difficult moment.
Convertible note hedging creates unpredictable selling pressure. Holders of the 4.25%, 2.375%, and 2.00% notes all engage in delta-hedging — selling ASTS shares short to manage their exposure as the stock moves. When notes are repurchased or converted, those hedges unwind in large, difficult-to-predict blocks. This has nothing to do with whether the satellites work; it is purely a function of options market mechanics. It is a persistent source of volatility that can look like fundamental deterioration when it is really just financial plumbing.

Conclusion

What strikes me about this capital raise is the specificity of the milestone ladder. ASTS is not raising a billion dollars to "explore opportunities" — a phrase that should always make investors suspicious. It is raising capital to hit three defined coverage thresholds, each of which corresponds to an incremental revenue unlock with named carrier partners who have signed binding contracts. The money raised in October 2025, combined with $1.22 billion already sitting on the balance sheet, is the clearest signal yet that this company has moved from "can we launch satellites that connect to phones?" to "how quickly can we fill out the constellation?"

The question I keep returning to is not whether the technology functions — Block 1 satellites are already in orbit and have demonstrated direct-to-phone connectivity — but whether the commercial revenue ramp can justify the ongoing capital consumption before the next shift in market sentiment. If ASTS reaches continuous U.S. coverage with 45–60 satellites and begins recognizing meaningful Verizon revenue, the bond investors sitting on $96.30 conversion prices will look prescient. If the satellite build drags, the dilution compounds, and the ATM program runs dry, this is a very different story. For now, the spectrum is secured, the carrier agreements are signed, and the balance sheet has more than a billion dollars in cash. The next act belongs to the launch pad.