Due Diligence Capital Notes

On February 10, 2026, AST SpaceMobile deployed a satellite with a phased array — that is, a flat antenna panel that electronically steers radio beams — measuring roughly 2,400 square feet. To put that in perspective, it is larger than many Manhattan studio apartments, and it is now orbiting Earth at low altitude, bouncing LTE signals directly to ordinary smartphones below. It is, by any metric, an engineering milestone. Two months later, on April 19, the company lost the next satellite in that same Block 2 series when a New Glenn rocket upper stage dropped it into a fatally low orbit. The satellite powered on, realized it was too low to raise itself with its thrusters, and was de-orbited. Gone. Estimated value: $155 million to $160 million, to be written off in Q2 2026.

That pair of events captures the entire tension inside this company. The underlying technology is genuinely extraordinary. The business model — connecting every mobile subscriber on Earth through a satellite network that works with phones they already own — is potentially enormous. And yet, as of March 31, 2026, AST SpaceMobile has recognized exactly zero dollars of revenue from its SpaceMobile Service. Total quarterly revenues of $14.7 million are real but come almost entirely from selling gateway equipment to mobile network operators (MNOs) — the telecom companies like AT&T and Bell Canada that will eventually resell the service. Meanwhile, the company is burning through capital at a pace that demands close attention from anyone holding or considering these shares.

The Core Mechanic: Building a Constellation on Borrowed Time (and Money)

To understand ASTS as an investment, you have to understand what it actually is right now: a capital-deployment machine racing to get enough satellites in orbit before its cash cushion runs dry. The company's strategy is to build a BlueBird satellite constellation — a network of large phased-array satellites in low Earth orbit (LEO) that collectively create what would be the first truly global broadband coverage accessible to standard 4G/5G phones without special hardware.

Getting there requires billions of dollars spent before a single recurring revenue dollar flows in. AST funds this construction phase primarily through convertible notes — debt instruments that bond investors buy now, receiving modest interest, with the right to convert the loan into company stock if the share price rises above a preset threshold. This is the same mechanism Strategy uses for Bitcoin accumulation, but here the underlying asset being built is hardware hurtling through space rather than a digital ledger entry.

What makes the math so delicate is the relationship between three numbers: total liquidity (~~$3.46B), total debt ($3.02B), and the quarterly cash burn (~~$250M in net losses, though this includes non-cash charges). The company is, in essence, borrowing money at low interest rates from debt markets and racing to deploy a constellation that generates recurring service revenue before the arithmetic catches up.

The Moving Parts

1. The BB6 Breakthrough — and What It Actually Means

The Block 2 BlueBird satellites are a step-change from Block 1. According to AST's 10-Q filed May 11, 2026, the Block 2 satellites feature "an up to approximately 2,400 square feet phased array, the largest phased array ever deployed in a LEO for commercial use, which is more than three times larger than the phased array of the Block 1 BB satellites and designed to deliver up to 10 times the bandwidth capacity of the Block 1 BB satellites." Ten times the bandwidth per satellite means far fewer satellites needed to cover a given geography at a usable data rate. This is not incremental improvement — it is a compression of the required constellation size, which directly compresses the capital required to reach commercial viability.

As of quarter-end, there are 5 Block 1 satellites in orbit. BB6 is the first Block 2 in orbit. The loss of BB7 means the second Block 2 is gone, and a replacement timeline has not been publicly specified.

2. The BB7 Write-Off — An Expensive but Not Necessarily Fatal Setback

The April 19 satellite loss is painful on multiple fronts. First, there is the direct write-off: $155M–$160M in carrying value (the amount ASTS had capitalized on its balance sheet for the satellite) will disappear from assets in Q2 2026, hitting the income statement as a loss. Second, there is the schedule delay: every Block 2 satellite that is not in orbit is a satellite that is not generating the capacity needed to recognize SpaceMobile Service revenue. Third, insurance recovery is pending — the filing does not quantify expected proceeds, which means investors cannot yet net that against the loss.

The important context is that the $155M–$160M is a balance sheet impairment, not a cash outflow. The cash was spent building and launching the satellite. The write-off is accounting recognizing a loss that already happened. It will make Q2 2026 reported losses look severe, likely pushing the quarterly net loss well above the $191M reported in Q1 2026, but it does not change the company's cash position.

3. The $1.075B Convertible Note Raise — Funding the Build

In February 2026, AST issued $1.075 billion in 2036 2.25% Convertible Notes — bonds paying 2.25% annual interest that mature in April 2036 and can be converted into common shares if the stock price rises above the conversion price. Simultaneously, the company induced holders of its older 2032 4.25% Convertible Notes to convert most of that debt into shares — an induced conversion — paying $88.7M in conversion expense (a non-cash charge representing the sweetener given to noteholders to accept shares instead of waiting for maturity). The net result: older, higher-interest debt swapped into equity, new long-dated low-interest debt brought in.

The balance sheet now shows $3.02B in total debt, structured as:

$1.15B in 2036 2.00% Convertible Notes
$1.075B in 2036 2.25% Convertible Notes
$325M in 2032 2.375% Convertible Notes
$420M UBS Bridge Financing Loan

The two 2036 convertible tranches alone represent $2.225 billion in debt that matures in a decade, giving the company a long runway before principal repayment pressure hits. The UBS Bridge Loan is the near-term concern — $428M of the company's $3.46B total liquidity is locked up as restricted cash collateral for that facility.

4. The Revenue Gap — 20x Growth That Still Equals Almost Nothing

The headline revenue number looks explosive: Q1 2026 revenues of $14.7M versus $0.7M in Q1 2025. That is approximately a 20x year-over-year increase. But it is worth pausing on what this revenue actually represents. Almost all of it — $13.4M out of $14.7M — came from gateway equipment and software sales to MNOs: the telecom companies are buying ground infrastructure to prepare for the SpaceMobile Service. Another $1.3M came from U.S. government services contracts. None of it came from subscribers paying to use space-based cellular coverage on their phones.

The real revenue opportunity is captured in the remaining performance obligations backlog — approximately $1.2 billion as of March 31, 2026, representing contracts signed with MNO partners that have been paid or committed but not yet recognized as revenue. Accounting rules (specifically ASC 606, the revenue recognition standard) require that revenue only be recognized when the performance obligation is satisfied — in this case, when the SpaceMobile Service is actually delivered. Critically, only about 8.4% of that $1.2B backlog is expected to be recognized in the next 12 months. The rest is deferred further out, contingent on constellation completion, regulatory approvals, and MNO network integration.

5. The Patent Moat — Underappreciated Infrastructure

One element that rarely gets discussed in ASTS analysis is the intellectual property stack: approximately 3,900 patent claims worldwide, with roughly 2,000 already granted or allowed across 38 patent families. The phased-array satellite-to-unmodified-phone connectivity approach is deeply patented. This matters not just defensively but as a signal of how seriously the company has protected the specific technical approach that makes the constellation viable. Any competitor building a similar direct-to-device service at this scale has to navigate this IP portfolio.

What Could Break This Thesis

Constellation delay compounds the cash burn problem. The loss of BB7 and any additional launch failures push back the date when SpaceMobile Service revenue can start flowing. The company is losing roughly $250M per quarter on a net basis. Even netting out non-cash items (depreciation, stock compensation, induced conversion expense), the cash consumption is substantial. If the constellation build-out takes materially longer than the current plan implies, the $3.46B liquidity pool shrinks faster than revenue grows to meet it. The $3.0B debt stack is long-dated, but lenders do not simply disappear.

Zero SpaceMobile Service revenue is a critical vulnerability. Every quarter the "SpaceMobile Service revenue recognized" line stays at zero, the gap between the current valuation and fundamental business performance widens. MNO partners need to complete their network integrations; regulators in dozens of markets need to approve spectrum use; subscribers need to actually adopt the service. Each one of those dependencies is a potential stall.

Dilution is structural, not episodic. Q1 2026 alone saw approximately 13 million new Class A shares issued through induced note conversions, ATM (at-the-market) equity sales, and RSU vesting. With $2.225B in convertible notes sitting above the stock as potential future equity, the share count of ~388 million (across all three share classes as of May 7, 2026) is not a ceiling. Every capital raise, note conversion, or equity compensation grant expands the denominator against which future earnings must be spread.

Insurance recovery for BB7 is unknown. The filing explicitly states the company cannot yet quantify insurance proceeds for the lost satellite. If coverage is partial or disputed, the net economic loss from the April 19 failure is larger than the $155M–$160M carrying value figure suggests.

The Bet, Stated Plainly

I want to be direct about what investing in ASTS at this stage actually is. It is a bet that a company with $3.46B in liquidity, $3.02B in debt, zero SpaceMobile Service revenue, and a $1.2B backlog that pays out slowly will successfully deploy enough Block 2 BlueBird satellites — despite setbacks like BB7 — to convert that backlog into recurring revenue before the financial structure becomes untenable.

The milestones that matter most from here are not quarterly earnings beats. They are: the first recognized dollar of SpaceMobile Service revenue, the next Block 2 launch success, and whether the BB7 replacement timeline allows the company to reach minimum viable constellation size within the existing capital envelope. The first U.S. VoLTE call over satellite was completed with AT&T on July 21, 2025. Bell Canada achieved its first space-based 4G call on October 2, 2025. The technology demonstrably works. The question has always been whether it can scale at the economics required, on the timeline required, with the capital available.

The BB6 satellite sitting in orbit right now — the largest commercial phased array ever deployed in LEO — is proof that the engineering is real. What happens over the next four to six quarters will determine whether the business is too.