Firefly Aerospace (FLY) Q3 2026 earnings review
Firefly wins billion-dollar space deals, but its losses keep widening
Firefly Aerospace, a builder of rockets, lunar landers and defense software, is winning huge orders while burning through its cash cushion. Third-quarter sales dipped 6% from the prior quarter to $111 million after an earlier defense order shift, yet backlog climbed to $1.7 billion before an even larger $1.3 billion engine and technology deal with AST SpaceMobile. Chief executive Jason Kim lifted the bottom of the full-year outlook, which by our math points to record fourth-quarter sales of about $136 million.
| Revenue | $110.7M -6% from last quarter; +260% from a year ago |
|---|---|
| Ending backlog | $1.7B up from $1.5B last quarter (before >$1.3B AST deal) |
| Free cash flow | -$85.3M $535M cash left vs $381M debt floor |
| Full-year revenue outlook | Raised $10M middle of the range: $445M ($440–450M) |
⚖️ Verdict: 🟢 Bullish
The story got better because the AST SpaceMobile deal and a $10 billion NASA lunar programme spot prove Firefly can sell engines, spacecraft and defense software without waiting on its own small-rocket launch schedule. One major caution: operating losses widened to $102 million and free cash flow was negative $85 million, leaving only $153 million of usable cash above the $381 million minimum required by its lenders.
The question now is whether the swelling order book brings enough upfront customer cash and profit margin to prevent another stock sale. Either the AST SpaceMobile contract delivers large upfront deposits and higher-margin licensing revenue, or ~23% gross margins and heavy research spending force Firefly to raise capital within two quarters. Fourth-quarter cash flow and the first Alpha Block II launch will tell.
🐂 Bull Case
Commercial Deals Push Future Orders past $3 Billion
Firefly's backlog, the total value of contracted orders not yet filled, hit a record $1.7 billion at the end of September. That is up 16% from $1.47 billion three months earlier. By our math, the space and defense group booked about $343 million in new orders during the quarter, more than three times the revenue it recorded.
Even larger deals arrived after the quarter closed. The Texas company signed contracts worth more than $1.3 billion with satellite-to-phone operator AST SpaceMobile, "which includes licensed IP, engine delivery, and engineering support". It also signed Lockheed Martin for up to 25 Alpha rocket flights through 2031, Japanese satellite maker Synspective for up to 10 flights, and SSC Space for two European launches from Sweden.
What to watch: how much of the AST SpaceMobile deal enters firm backlog and deferred revenue in the fourth-quarter report. Selling rocket engines and technology licences provides a new revenue stream that does not wait on Firefly's own launch pad schedule.
Moon and Mars Contracts Fill the Expanded Cleanroom
Firefly builds Blue Ghost lunar landers and Elytra orbital vehicles, which tug satellites and host cameras or computers in space. During the quarter, the company finished expanding its Texas spacecraft facility using a state grant. The bigger cleanroom allows "simultaneous assembly and integration of up to 12 lunar landers and orbital vehicles" as the team runs five Moon missions in parallel.
- NASA CLPS 2: onboarded to compete for a $10 billion cargo lander programme for the agency's Moon Base
- Mars SkyFall mission: won a $13 million NASA subcontract to build and test the protective aeroshell for a late-2028 launch
- Elytra and commercial payloads: won a Defense Innovation Unit contract to design a deorbit system, plus lunar deals with Starcloud and Zeno Power Systems
What to watch: the initial task orders awarded under NASA's $10 billion CLPS 2 programme over the next year. Winning a large cargo lander contract would turn that programme eligibility into funded backlog.
Defense Software and Radar Wins Expand SciTec
SciTec, the defense software and sensor unit Firefly bought in late 2025, continues to win US military business. The Space Force awarded Firefly a $94 million contract under the Ground-Based Radar Digitization programme "to support work overhauling legacy defense systems". The military also added the company to NITE-STAR, a $981 million contract pool for space testing and training through 2032.
SciTec also extended its US Air Force contract for Cloud-Based Command and Control to add counter-drone sensor feeds, and reached an operational milestone on FORGE, the Space Force's missile-warning software system. These wins show that defense software is driving revenue today while rocket launches remain infrequent.
What to watch: the segment revenue split between Spacecraft Solutions and Launch in the third-quarter filing. A rising share of software and engineering work would explain why gross margin improved even without a rocket launch.
Higher Full-Year Outlook Points to a Fourth-Quarter Jump
Quarterly revenue dipped 6% from the second quarter to $110.7 million because a defense customer had pulled a hardware order forward into the spring. Even so, chief executive Jason Kim raised the bottom of the full-year revenue outlook by $20 million, narrowing the range to $440–450 million after holding it at $420–450 million for three quarters.
By our math, the middle of the new plan leaves $135.8 million of revenue for the fourth quarter. That represents a 22.7% jump from the third quarter and a record quarterly figure, driven by spacecraft milestones and early engineering work on recent contract wins.
What to watch: whether fourth-quarter revenue reaches the $135.8 million implied by the middle of the outlook without relying on two Alpha rocket launches. Hitting the target on spacecraft and defense work alone would prove the top line no longer depends on launch timing.
🐻 Bear Case
Cash Burn Leaves Less Than Two Quarters Above the Debt Floor
Firefly's rapid contract growth still requires heavy cash spending. Free cash flow—operating cash flow minus property and software purchases—was negative $85.3 million in the third quarter, bringing the nine-month cash drain to $270.5 million. While the quarterly burn eased from $106.3 million in the second quarter, it remained 38% worse than a year ago.
The company ended September with $534.7 million in cash and short-term investments, down from $635.3 million in June. Under its credit agreement, Firefly must keep at least $381.3 million in liquidity. By our math, that leaves only $153.4 million of usable cash above the floor—less than two quarters of spending at the third-quarter pace.
What to watch: upfront customer deposits from the $1.3 billion AST SpaceMobile agreement in the fourth quarter. Unless that deal brings large upfront cash payments, the company will likely need to sell more shares or amend its debt floor within two quarters.
Wider Operating Losses Offset a Slight Gross Margin Rebound
"With five Moon missions running in parallel, Alpha Block II moving toward launch, SciTec executing on critical national security programs, and our strategic deal with AST SpaceMobile, we are converting our pipeline and backlog into results," chief executive Jason Kim said. While gross margin rose 2.6 percentage points from the second quarter to 22.9% as cost of sales eased to 77.1% of revenue, it remained 4.7 percentage points below last year's 27.6%.
- Research and development: $76.0 million, up from $71.5 million in Q2 to 68.7% of revenue
- Selling, general and administrative: $50.9 million, up from $47.5 million in Q2 to 46.0% of revenue
- Operating loss: widened to $101.6 million ($78.7 million excluding one-offs), while Adjusted EBITDA loss grew to $69.5 million
Revenue is nearly four times higher than a year ago, but operating losses are hitting new highs because engineering and overhead costs are rising alongside contract wins. A ~23% gross margin does not generate enough gross profit to cover $126.9 million in quarterly operating expenses.
What to watch: fourth-quarter gross margin and operating expenses excluding one-offs. If revenue jumps to $135.8 million as planned and the operating loss does not shrink, the current contract mix lacks the profit margin to reach breakeven.
Alpha Block II Still Has Not Launched as Fourth Quarter Begins
Alpha is Firefly's small-satellite rocket, and Block II is an upgraded version designed to improve reliability and speed up production. After cutting its 2026 launch target from four rockets to three last quarter, management aimed to fly both remaining launches—Flight 8 and Flight 9—in the fourth quarter. In the November 10 release, Kim said only that Alpha Block II is "moving toward launch".
The company did win a third hypersonic task order for Alpha and signed multi-launch contracts with Lockheed Martin, Synspective and SSC Space. However, Firefly recognizes launch revenue only when a rocket flies, and management relies on higher launch rates to spread out fixed factory costs and lift gross margin.
What to watch: the actual launch of Alpha Flight 8 before December 31. A slip into 2027, or any flight anomaly after previous setbacks on Flight 6 and a September 2025 ground test, would delay the expected margin recovery on rocket production.
Risks this quarter didn't answer
Four standing risks from prior quarters received no new numbers or dates in the third-quarter earnings release.
- Eclipse and Blue Ghost Mission 2 launch dates: Miranda engine testing passed 170 hot fires, but the release gave no launch dates; the conference call will test whether early-2027 targets hold.
- Fixed-price contract losses: whether loss provisions rose above Q2's $11.7 million lives in Note 4 of the upcoming 10-Q filing.
- Customer concentration: whether a single customer still accounts for over 40% of revenue will appear in Note 2 of the 10-Q filing.
- IPO securities lawsuit: any procedural update on the Alpha readiness class action will appear in the 10-Q legal footnote.
💲 Other KPIs
Total deferred revenue—cash customers have paid for work not yet delivered—rose 3.6% from last quarter to $217.2 million, after staying near $209 million in the first half. Meanwhile, contract assets—revenue recorded on milestones before the customer is billed—jumped to $25.4 million from $3.5 million at year-end, consuming $21.9 million of nine-month operating cash.
The average share count rose 4.1% from the second quarter and 79.4% from a year ago, following last year's initial public offering, the June 2026 stock sale, and the Space-ng acquisition. Stock-based compensation reached $15.3 million in the third quarter and $44.8 million over nine months, up from $5.2 million in the first nine months of 2025.
Unpaid customer bills stood at $56.4 million at the end of September, up 22.3% from $46.1 million at the end of 2025 as quarterly sales scaled following the SciTec acquisition. Collections brought in $1.7 million of operating cash during the third quarter, though rising receivables have used $10.1 million of cash over the first nine months.
🔮 Guidance
Raised. Firefly lifted the bottom of its full-year outlook by $20 million, moving the middle of the range up $10 million to $445 million (178.4% growth from 2025, boosted by the SciTec buyout). After three unchanged quarters, this is the first raise for 2026. By our math, the middle of the plan leaves $135.8 million for the fourth quarter, up 22.7% from the third quarter.
❓ Key Questions
How much upfront cash comes with the AST SpaceMobile deal?
Firefly signed contracts worth over $1.3 billion with AST SpaceMobile after the quarter closed. With usable cash above the $381.3 million debt floor down to $153.4 million, investors need to know the payment schedule and how much cash arrives in 2026.
Will Alpha Flight 8 and Flight 9 both launch in Q4?
Last quarter management planned two Alpha Block II launches in the fourth quarter, but the November 10 release gave no launch date for Flight 8. How much fourth-quarter revenue in the $440–450 million outlook depends on those two rockets flying before year-end?
What is the backlog split between rockets, spacecraft and SciTec?
Backlog reached $1.7 billion at quarter-end before the AST SpaceMobile and Synspective deals. Without a breakdown between unscheduled multi-year launch agreements and funded spacecraft or SciTec defense contracts, readers cannot judge how fast the new orders turn into revenue.
Did fixed-price lunar contracts take any new loss provisions?
In the second quarter, contract loss provisions rose to $11.7 million after two fixed-price contracts went over budget. Did cost estimates on the five parallel Blue Ghost lunar missions stay on budget in the third quarter?