RKLB vs. ASTS on Monday: One Has a $2.2B Backlog. The Other Has a $1.4B Burn Rate.

Both Rocket Lab and AST SpaceMobile report Q2 earnings after the close on Monday, August 10. The market treats them as the same type of call on the space economy. They're not. And the disconnect matters because earnings season compresses what should be a two-week evaluation window into a single day.

One company trades at 73 times trailing sales with $2.2B Backlog and just agreed to acquire a $495 million OEBITDA cash engine. The other trades at 329 times trailing sales while burning $1.4 billion trying to build its delivery infrastructure from scratch.

The real variable isn't satellite technology. It's contracted revenue.

Rocket Lab reported $200.3 million in Q1 2026 revenue, up 63.5% year over year. The $2.2 billion backlog more than doubled from the prior year. More launches were sold in one quarter than in all of 2025. The company signed its largest launch contract ever — five dedicated Neutron missions plus three Electron flights for a confidential customer, baselined through 2029.

That backlog is proof of demand, not a projection. These are signed, contracted missions. Rocket Lab is collecting.

AST SpaceMobile reported $14.7 million in Q1 2026 revenue, up from $718,000 a year earlier. That's triple-digit growth on a base that was essentially zero. The company has over $1.2 billion in contracted revenue commitments with mobile network operators — but it doesn't have enough satellites in orbit to deliver the service yet. BlueBird 7 failed in Q1, adding cost without revenue. The company is targeting 45 satellites in orbit by early 2027 and has launched perhaps a dozen so far.

The difference between a contract and delivered revenue is the difference between these two companies right now. One is collecting on its backlog. The other needs to build the delivery infrastructure first.

The Iridium deal changes Rocket Lab's entire profile

The number that matters for Rocket Lab isn't its own $680 million in trailing revenue. It's the Iridium acquisition, announced June 29.

Rocket Lab agreed to acquire Iridium Communications for approximately $8 billion in enterprise value. Iridium generated $871.7 million in revenue in 2025 and $495 million in operational EBITDA — a 57% cash earnings margin on a global satellite network serving 2.55 million active subscribers. The deal is expected to close in mid-2027.

Operational EBITDA — earnings before interest, taxes, and depreciation and amortization, a rough proxy for operating cash generation — at a 57% margin means nearly 57 cents of every dollar in revenue converts to operating cash. That's exceptional for an infrastructure business.

Right now, Rocket Lab is burning $316 million in free cash flow annually. The Iridium acquisition flips the combined entity to cash-flow-positive. That's the shortcut CEO Peter Beck described: acquiring an operating constellation instead of spending years building one from scratch.

The deal also gives Rocket Lab Iridium's L-band spectrum (licensed radio frequency space for satellite communication), which is nearly impossible for new entrants to obtain. That spectrum covers aviation, maritime, defense, government, IoT, and direct-to-device services. It instantly puts Rocket Lab on the same spectrum playing field as SpaceX, which paid roughly $17 billion for EchoStar's spectrum, and Amazon, which acquired Globalstar for its LEO network.

Rocket Lab's market cap sits at $49.5 billion. At the current market cap, the combined entity would operate roughly $1.55 billion in annual revenue once the acquisition closes — roughly $680 million from Rocket Lab's own growing base plus $872 million from Iridium. That's about 32 times combined forward sales, with Iridium contributing the vast majority of the cash earnings.

Rocket Lab trades at 73 times its own trailing sales today. That number only looks disconnected because it doesn't include Iridium. Once the deal closes, the multiple compresses sharply and the cash flow profile changes from negative to positive.

AST SpaceMobile's $1.4 billion burn rate doesn't care about your thesis

AST SpaceMobile is building the first space-based cellular broadband network accessible directly from unmodified smartphones. The ambition is real. The FCC authorized deployment of up to 248 satellites in the U.S. The company has nearly 60 mobile network operator partners covering over 3 billion subscribers. It hit 98.9 Mbps peak download speeds from orbit to a standard phone.

But the execution gap between ambition and revenue is enormous.

The company burned $1.37 billion in free cash flow over the trailing twelve months. Q1 2026 operating expenses rose $37.5 million quarter over quarter to $164.1 million, driven by engineering services costs related to the BlueBird 7 launch failure. Capital expenditures alone were $1.28 billion over the past year.

AST SpaceMobile holds $3.03 billion in cash, which gives it runway — probably two to three years at the current burn rate, assuming guidance holds and no more launch failures. But the revenue timeline is backloaded. The company guided to $150–$200M in 2026 revenue. At the midpoint, that's still roughly 180 times the current $28 billion market cap. Even if they hit the top of guidance, the stock is pricing in years of flawless execution followed by a path to $2.1 billion in revenue by 2028 — a growth rate of roughly 386% annually from a $150 million base.

The company launched BlueBirds 11 through 13 on August 5, just before earnings. Manufacturing is advanced through satellite 42. That production pipeline is encouraging, but it's still a deployment story, not a revenue story. The contracted revenue commitments with operators can't be recognized until the satellites deliver service.

AST SpaceMobile trades at 329 times trailing sales. At that multiple, every launch delay, every margin miss, every quarter of widening losses is priced against the stock. AInvest's aggregate signal rates it a Hold, which reflects a market caught between the optionality of the endgame and the reality of the burn rate.

The earnings catalyst on Monday

Both companies report after the close on August 10.

For Rocket Lab, Q2 revenue was guided to $225–240 million. The consensus estimate sits below that range, so a beat at the midpoint is likely. The more important question is Neutron progress — the first flight is now expected in Q4 2026, and any slip past year-end would rattle investors. The Iridium deal also needs to stay on track for a mid-2027 close.

For AST SpaceMobile, the Q2 report is a stress test. The company needs to show revenue ramping toward its $150–200 million annual target while containing the cash burn. The August 5 launch of BlueBirds 11 through 13 is a positive operational signal — it positions the company for beta services later this year. But one successful launch doesn't close the gap between $14.7 million in quarterly revenue and a $28 billion market cap.

The break condition

Rocket Lab needs Neutron to launch in Q4 2026 and the Iridium deal to close on schedule in mid-2027. If Neutron slips materially or the Iridium acquisition faces regulatory blockage, the current premium valuation has no near-term justification. The stock has quadrupled over the past year — it's not sitting at a beaten-down price. A pullback would set up a cleaner entry point.

AST SpaceMobile needs to execute 30+ more satellite launches, convert its $1.2 billion in contracted commitments into recognized revenue, and shrink a $1.37 billion annual cash burn into something approaching sustainability — all while maintaining a $28 billion market cap. The break condition is revenue inflection: once quarterly revenue starts running above $50 million consistently, the growth narrative catches up to the multiple. Until then, the stock is priced for perfection.

AInvest's aggregate signal labels Rocket Lab a Buy and AST SpaceMobile a Hold. The math supports that split. Rocket Lab's valuation looks disconnected only if you ignore Iridium. AST SpaceMobile's valuation is disconnected from reality unless every satellite launches on time and every operator converts its commitment into a paying contract.

The market is comparing two space stocks. The forward math says they're different asset classes. Monday's earnings will test whether that gap narrows or widens.